Index to Larval Food Plants

A

Abies balsamea,

see Pine White

Agropyron repens,

see European Skipper and Long Dash Skipper

Agrostis spp.,

see Common Roadside Skipper

Alder,

see Green Comma

Alfalfa,

see Clouded Sulphur and Silvery Blue

Alkali Mallow,

see Small Checkered Skipper

Alnus spp.,

see Green Comma

Alpine Bistort,

see Mountain Fritillary and Bog Fritillary

Alpine Goldenrod,

see Damoetas Checkerspot

Alpine Milk-vetch,

see Hecla Sulphur, and Labrador Sulphur

Alsike Clover,

see Greenish Blue

Amaranthaceae,

see Common Sootywing

Amaranthus graecizans,

see Common Sootywing

Amelanchier alnifolia,

see Coral Hairstreak

Amelanchier spp.,

see California Hairstreak

American Beech,

see Early Hairstreak

Amorpha fruticosa,

see Silver-spotted Skipper and Hoary Edge

Amphicarpaea bracteata,

see Silver-spotted Skipper, and Northern Cloudywing

Anaphalis spp.,

see American Lady

Andropogon gerardii,

see Delaware Skipper and Dusted Skipper

Andropogon scoparius,

see Ottoe Skipper, Indian Skipper, Crossline Skipper, and Dusted Skipper

Andropogon spp.,

see Common Branded Skipper and Common Wood-Nymph

Angelica,

see Short-tailed Swallowtail

Angelica atropurpurea,

see Short-tailed Swallowtail

Angelica spp.,

see Anise Swallowtail

Antelope-brush,

see Behr's Hairstreak and California Hairstreak

Antennaria spp.,

see American Lady

Antirrhinum spp.,

see Common Buckeye

Apiaceae,

see Black Swallowtail, Short-tailed Swallowtail, and Old World Swallowtail

Apios americana,

see Silver-spotted Skipper

Apocynaceae,

see Subfamily Danainae

Apple,

see Lorquin's Admiral

Aquilegia brevistyla,

see Columbine Duskywing

Aquilegia canadensis,

see Columbine Duskywing

Arabis glabra,

see Large Marble

Arabis spp.,

see Spring White, Mustard White, and Olympia Marble

Aralia hispida,

see Cherry Gall Azure

Arbutus, Trailing,

see Hoary Elfin

Arceuthobium campylopodum,

see Johnson's Hairstreak

Arceuthobium spp.,

see Thicket Hairstreak

Arctic Blueberry,

see Heath Sulphur

Arctic Avens,

see Frigga Fritillary

Arctium spp.,

see Painted Lady

Arctostaphylos uva-ursi,

see Brown Elfin, Hoary Elfin, and Freija Fritillary

Aristolochia macrophylla,

see Pipevine Swallowtail

Artemisia arctica,

see Old World Swallowtail

Artemisia dracunculus,

see Old World Swallowtail

Artemisia spp.,

see Painted Lady

Asclepiadaceae,

see Subfamily Danainae

Asclepias incarnata,

see Monarch

Asclepias ovalifolia,

see Monarch

Asclepias speciosa,

see Monarch

Asclepias syriaca,

see Monarch

Asclepias tuberosa,

see Monarch

Asclepias viridiflora,

see Monarch

Ash,

see Eastern Tiger Swallowtail, Canadian Tiger Swallowtail, and Baltimore Checkerspot

Ash, Northern Prickly,

see Giant Swallowtail

Ash, White,

see Hickory Hairstreak

Asimina triloba,

see Zebra Swallowtail

Aspen,

see Subfamily Limenitidinae, Dreamy Duskywing, and White Admiral

Aster,

see Gorgone Checkerspot, Silvery Checkerspot, Pearl Crescent, Northern Crescent, Tawny Crescent, and Field Crescent

Aster, Flat-topped White,

see Harris's Checkerspot

Aster, Small Blue,

see Northern Crescent

Aster ciliolatus,

see Pearl Crescent

Aster lanceolatus,

see Gorgone Checkerspot

Aster novae-angliae,

see Gorgone Checkerspot

Aster simplex,

see Northern Crescent

Aster spp.,

see Gorgone Checkerspot, Silvery Checkerspot, Pearl Crescent, Northern Crescent, Tawny Crescent, and Field Crescent

Aster umbellatus,

see Harris's Checkerspot

Asteraceae,

see Subfamily Melitaeinae, Old World Swallowtail, Silvery Checkerspot, American Lady, and Painted Lady

Astragalus alpinus,

see Hecla Sulphur and Labrador Sulphur

Astragalus crassicarpus,

see Afranius Duskywing

Astragalus spp.,

see Queen Alexandra's Sulphur, Silvery Blue, Northern Blue, Shasta Blue, and Arctic Blue

Avena fatua,

see Common Wood-Nymph

Avena sativa,

see Common Roadside Skipper

Avens, Arctic,

see Frigga Fritillary

Avens, Mountain,

see Polaris Fritillary and Alberta Fritillary

B

Balsam Fir,

see Pine White

Baptisia tinctoria,

see Wild Indigo Duskywing and Frosted Elfin

Barnyard Grass,

see Long Dash Skipper

Beach Pea,

see Silvery Blue

Beaked Hazelnut,

see Early Hairstreak

Bean,

see Long-tailed Skipper and Grey Hairstreak

Bean, Buffalo,

see Afranius Duskywing

Bearberry,

see see Brown Elfin, Hoary Elfin, and Freija Fritillary

Bearded Shortgrass,

see Northern Pearly-Eye

Beardtongue,

see Variable Checkerspot

Beech, American,

see Early Hairstreak

Bent Grass,

see Common Roadside Skipper

Bermuda Grass,

see Sandhill Skipper and Sachem

Betula spp.,

see Green Comma, Compton Tortoiseshell, and White Admiral

Big Bluestem,

see Delaware Skipper and Dusted Skipper

Birch,

see Dreamy Duskywing, Western Tiger Swallowtail, Green Comma, Compton Tortoiseshell, and White Admiral

Bistort, Alpine,

see Mountain Fritillary and Bog Fritillary

Bistort, Western,

see Arctic Fritillary

Bitternut Hickory,

see Hickory Hairstreak

Black Buckthorn,

see Henry's Elfin

Black Cohosh,

see Spring Azure

Black Crowberry,

see Northern Blue and Arctic Blue

Black Locust,

see Silver-spotted Skipper

Black Oak,

see Edwards' Hairstreak

Black Spruce,

see Bog Elfin and Western Pine Elfin

Black-eyed Susan,

see Gorgone Checkerspot

Blue Grama,

see Uncas Skipper, Plains Skipper, Leonard's Skipper, Pahaska Skipper, Rhesus Skipper, Simius Roadside Skipper, Oslar's Roadside Skipper, and Ridings' Satyr

Blue Grass,

see Least Skipper, Juba Skipper, Common Branded Skipper, Sandhill Skipper, Tawny-edged Skipper, Long Dash Skipper, Hobomok Skipper, Little Wood-Satyr, and Common Ringlet

Blueberry,

see Pelidne Sulphur, Pink-edged Sulphur, Striped Hairstreak, Brown Elfin, Henry's Elfin, Spring Azure, Cranberry Blue, Freija Fritillary, and Green Comma

Blueberry, Arctic,

see Heath Sulphur

Blueberry, Bog,

see Polaris Fritillary

Blueberry, Dwarf,

see Heath Sulphur and Northern Blue

Bluestem,

see Common Branded Skipper, Common Wood-Nymph

Bluestem, Big,

see Delaware Skipper and Dusted Skipper

Bluestem, Little,

see Ottoe Skipper, Dakota Skipper, Indian Skipper, Crossline Skipper, and Dusted Skipper

Bog Blueberry,

see Polaris Fritillary

Bouteloua gracilis,

see Uncas Skipper, Plains Skipper, Leonard's Skipper, Pahaska Skipper, Rhesus Skipper, Simius Roadside Skipper, Oslar's Roadside Skipper, and Ridings' Satyr

Brachyelytrum erectum,

see Northern Pearly-Eye

Bracted Honeysuckle,

see Gillette's Checkerspot

Brassicaceae,

see Subfamily Pierinae, Becker's White, Checkered White, Margined White, and Mustard White

Braya humilis,

see Green Marble

Bristly Sarsaparilla,

see Cherry Gall Azure

Broccoli,

see Cabbage White

Brome Grass,

see Western Branded Skipper

Bromus spp.,

see Western Branded Skipper

Buckbrush,

see California Hairstreak and Hedgerow Hairstreak

Buckthorn, Black,

see Henry's Elfin

Buckwheat,

see Blue Copper, Sheridan's Hairstreak, Square-spotted Blue, Rocky Mountain Dotted Blue, and Mormon Metalmark

Buckwheat, Parsnip-flowered,

see Western Green Hairstreak

Buckwheat, Snow,

see Mormon Metalmark

Buffalo Bean,

see Afranius Duskywing

Bur Oak,

see Sleepy Duskywing and Edwards' Hairstreak

Burdock,

see Painted Lady

Bush-Clover,

see Hoary Edge

Butterfly-weed,

see Monarch

Butternut,

see Banded Hairstreak and Hickory Hairstreak

C

Cabbage,

see Checkered White and Cabbage White

Canary Reed Grass,

see Least Skipper

Canby's Blue Grass,

see Red-disked Alpine

Canna,

see Brazilian Skipper

Cannaceae,

see Brazilian Skipper

Carduus spp.,

see Mylitta Crescent and Painted Lady

Carex aquatilis,

see Mulberry Wing

Carex atherodes,

see Eyed Brown

Carex atrofusca,

see Ross's Alpine

Carex bigelowii,

see Melissa Arctic

Carex concinna,

see Jutta Arctic

Carex geyeri,

see Jutta Arctic

Carex gracillima,

see Dun Skipper

Carex heliophila,

see Dun Skipper

Carex hyalinolepis,

see Dion Skipper, Dukes' Skipper

Carex lacustris,

see Broad-winged Skipper, Dion Skipper, Dukes' Skipper, Dun Skipper, Eyed Brown, and Appalachian Brown

Carex misandra,

see White-Veined Arctic and Polixenes Arctic

Carex rariflora,

see Ross's Alpine

Carex rostrata,

see Broad-winged Skipper and Eyed Brown

Carex rupestris,

see Melissa Arctic

Carex spissa,

see Dun Skipper

Carex stricta,

see Mulberry Wing, Dion Skipper, Eyed Brown, Black Dash, and Appalachian Brown

Carex trichocarpa,

see Two-spotted Skipper

Carrot,

see Black Swallowtail

Carya cordiformis,

see Hickory Hairstreak

Cassia spp.,

see Cloudless Sulphur and Sleepy Orange

Castilleja spp.,

see Northern Checkerspot, Variable Checkerspot, and Edith's Checkerspot

Cauliflower,

see Cabbage White

Ceanothus americanus,

see Mottled Duskywing and Summer Azure

Ceanothus cordulatus,

see Pacuvius Duskywing

Ceanothus ovatus,

see Mottled Duskywing

Ceanothus sangineum,

see California Tortoiseshell

Ceanothus spp.,

see Pacuvius Duskywing, Pale Swallowtail, California Hairstreak, Hedgerow Hairstreak, and California Tortoiseshell

Cedar, Eastern Red,

see Juniper Hairstreak

Cedar, Western Red,

see Rosner's Hairstreak

Celery,

see Black Swallowtail

Celtis occidentalis,

see American Snout and Hackberry Emperor

Celtis spp.,

see Mourning Cloak

Celtis tenuifolia,

see Hackberry Emperor

Centaurea spp.,

see Painted Lady

Chamaedaphne calyculata,

see Brown Elfin

Chelone glabra,

see Baltimore Checkerspot

Chenopodiaceae,

see Hayhurst's Scallopwing and Common Sootywing

Chenopodium album,

see Hayhurst's Scallopwing and Common Sootywing

Cherry,

see Eastern Tiger Swallowtail, Canadian Tiger Swallowtail, Pale Swallowtail, California Hairstreak, Coral Hairstreak, Striped Hairstreak, Spring Azure, Cherry Gall Azure, White Admiral, and Lorquin's Admiral

Cherry, Choke,

see Cherry Gall Azure

Chickweed,

see Dainty Sulphur

Choke Cherry,

see Cherry Gall Azure

Chrysothamnus viscidiflorus,

see Northern Checkerspot

Cimicifuga racemosa,

see Spring Azure

Cinquefoil,

see Grizzled Skipper

Cinquefoil, Shrubby,

see Dorcas Copper

Cirsium muticum, see Family Riodinidae

Cirsium spp.,

see Pale Crescent and Painted Lady

Cloudberry,

see Grizzled Skipper

Clover,

see Clouded Sulphur

Clover, Alsike,

see Greenish Blue

Clover, Red,

see Eastern Tailed Blue and Greenish Blue

Clover, White,

see Eastern Tailed Blue and Greenish Blue

Cocksfoot,

see European Skipper and Little Wood-Satyr

Coltsfoot ,

see Old World Swallowtail

Columbine,

see Columbine Duskywing

Common Milkweed (see also Asteraceae),

see Monarch

Compositae,

see Subfamily Melitaeinae and Old World Swallowtail

Comptonia peregrina,

see Grey Hairstreak

Coneflower,

see Silvery Checkerspot

Cornus florida,

see Spring Azure

Cornus spp.,

see Summer Azure

Coronilla varia,

see Wild Indigo Duskywing

Corydalis pauciflora,

see Eversmann's Parnassian

Corydalis spp.,

see Eversmann's Parnassian

Corylus cornuta,

see Early Hairstreak

Cotton,

see Grey Hairstreak

Cotton-grass,

see Banded Alpine and Philip's Arctic

Cotton-grass, Dense,

see Jutta Arctic

Cottonwood,

see Mourning Cloak and Lorquin's Admiral

Couch Grass,

see European Skipper

Cow-Parsnip,

see Short-tailed Swallowtail and Anise Swallowtail

Cow Vetch,

see Eastern Tailed Blue and Silvery Blue

Cowania,

see Moss's Elfin

Crab Grass,

see Tawny-edged Skipper, Northern Broken-Dash, and Sachem

Cranberry,

see Bog Copper and Cranberry Blue

Cranberry, Small,

see Bog Fritillary

Crassulaceae,

see Phoebus Parnassian and Moss's Elfin

Crataegus spp.,

see Hickory Hairstreak, Striped Hairstreak, and Southern Hairstreak

Creeping Juniper,

see Juniper Hairstreak

Creeping Snowberry,

see Bog Fritillary

Croton,

see Red-banded Hairstreak

Croton spp.,

see Red-banded Hairstreak

Crowberry, Black,

see Northern Blue and Arctic Blue

Crown-vetch,

see Wild Indigo Duskywing

Cruciferae,

see Subfamily Pierinae

Cudweed,

see American Lady

Cultivated Oats,

see Common Roadside Skipper

Curled Dock,

see American Copper, Grey Copper, and Bronze Copper

Currant,

see Hoary Comma and Grey Comma

Cynodon dactylon,

see Sandhill Skipper and Sachem

D

Dactylis glomerata,

see European Skipper and Little Wood-Satyr

Danthonia spicata,

see Indian Skipper and Chryxus Arctic

Daucus carota,

see Black Swallowtail

Dense Cotton-grass,

see Jutta Arctic

Dentaria diphylla,

see West Virginia White

Dentaria spp.,

see Mustard White

Deschampsia elongata,

see Juba Skipper

Desert-aster,

see Sagebrush Checkerspot

Desert Parsley,

see Indra Swallowtail

Desert Saltgrass,

see Sandhill Skipper

Desmodium canadense,

see Silver-spotted Skipper

Desmodium spp.,

see Hoary Edge and Wild Indigo Duskywing

Diapensia lapponica,

see Arctic Blue

Diapensiaceae,

see Arctic Blue

Dicentra spp.,

see Clodius Parnassian

Digitaria sanguinalis,

see Northern Broken-Dash and Sachem

Digitaria spp.,

see Tawny-edged Skipper

Dill,

see Black Swallowtail

Distichlis spicata var. stricta,

see Sandhill Skipper

Dock,

see Lustrous Copper, Grey Copper, Ruddy Copper, and Purplish Copper

Dock, Curled,

see American Copper, Grey Copper, and Bronze Copper

Dock, Sand,

see Ruddy Copper

Dock, Water,

see Bronze Copper

Dock, Western,

see Grey Copper

Dogbane family,

see Subfamily Danainae

Dogwood,

see Summer Azure

Dogwood, Flowering,

see Spring Azure

Douglas-fir,

see Pine White

Douglas's Knotweed,

see Lilac-bordered Copper and Mariposa Copper

Draba lanceolata,

see Northern Marble

Draba spp.,

see Green Marble

Dragonwort,

see Old World Swallowtail

Dryas integrifolia,

see Frigga Fritillary

Dryas octopetala,

see Alberta Fritillary

Dryas spp.,

see Polaris Fritillary

Dutchman's Pipe,

see Pipevine Swallowtail

Dwarf Blueberry,

see Heath Sulphur and Northern Blue

Dwarf Mistletoe,

see Thicket Hairstreak

Dwarf Willow,

see Dingy Fritillary

E

Eastern Red Cedar,

see Juniper Hairstreak

Echinochloa repens,

see Long Dash Skipper

Eleocharis elliptica,

see Poweshiek Skipperling

Elm,

see Question Mark, Eastern Comma, Hoary Comma, and Mourning Cloak

Empetrum nigrum,

see Northern Blue and Arctic Blue

Epigaea repens,

see Hoary Elfin

Erianthus sp.,

see Delaware Skipper

Ericaceae,

see Subfamily Coliadinae, Brown Elfin and Cranberry Blue

Erigeron leiomerus,

see Damoetas Checkerspot

Eriogonum flavum,

see Rocky Mountain Dotted Blue

Eriogonum heracloides,

see Western Green Hairstreak

Eriogonum multiceps,

see Mormon Metalmark

Eriogonum niveum,

see Mormon Metalmark

Eriogonum spp.,

see Blue Copper, Sheridan's Hairstreak, Square-spotted Blue, Rocky Mountain Dotted Blue, Lupine Blue, and Mormon Metalmark

Eriogonum umbellatum,

see Sheridan's Hairstreak and Square-spotted Blue

see Banded Alpine and Philip's Arctic

Everlasting,

see American Lady

F

Fabaceae,

see Subfamily Coliadinae, Subfamily Polyommatinae, Subfamily Pyrginae, Genus Erynnis, Silver-spotted Skipper, Long-tailed Skipper, Hoary Edge, Southern Cloudywing, Northern Cloudywing, Zarucco Duskywing, Funereal Duskywing, Wild Indigo Duskywing, Afranius Duskywing, Persius Duskywing, Clouded Sulphur, Mexican Yellow, Little Yellow, Sleepy Orange, Marine Blue, Reakirt's Blue, Eastern Tailed Blue, Western Tailed Blue, Arrowhead Blue, Silvery Blue, Northern Blue, Melissa Blue, Shasta Blue, Lupine Blue, and Arctic Blue

Fagaceae,

see Subfamily Pyrginae, Genus Erynnis, Sleepy Duskywing, and Horace's Duskywing

Fagus grandifolia,

see Early Hairstreak

Fall Witchgrass,

see Ottoe Skipper

False Indigo,

see Silver-spotted Skipper and Hoary Edge

False Melic Grass,

see Northern Pearly-Eye

Fescue,

see Common Branded Skipper

Fescue, Idaho,

see Sonoran Skipper

Fescue, Nodding,

see Indian Skipper

Fescue, Sheep,

see Nevada Skipper

Festuca brachyphylla,

see White-Veined Arctic

Festuca idahoensis,

see Sonoran Skipper

Festuca mibra,

see White-Veined Arctic and Polixenes Arctic

Festuca obtusa,

see Indian Skipper

Festuca ovina,

see Nevada Skipper

Festuca spp.,

see Common Branded Skipper

Festuca vivipara,

see White-Veined Arctic

Figwort family,

see Common Buckeye

Fir, Balsam,

see Pine White

Flat-topped White Aster,

see Harris's Checkerspot

Flax,

see Variegated Fritillary

Fleabane,

see Damoetas Checkerspot

Flowering Dogwood,

see Spring Azure

Fluff Grass,

see Pahaska Skipper

Fraxinus americana,

see Hickory Hairstreak

Fraxinus spp.,

see Eastern Tiger Swallowtail, Canadian Tiger Swallowtail, and Baltimore Checkerspot

Fumariaceae,

see Eversmann's Parnassian and Clodius Parnassian

G

Garry Oak,

see Propertius Duskywing

Gaultheria hispidula,

see Bog Fritillary

Gerardia,

see Common Buckeye

Gerardia spp.,

see Common Buckeye

Glycyrrhiza lepidota,

see Silver-spotted Skipper

Gnaphalium spp.,

see American Lady

Goldenrod, Alpine,

see Damoetas Checkerspot

Gooseberry,

see Oreas Comma

Grass,

see Subfamily Hesperiinae, Subfamily Heteropterinae, Genus Hesperia, Arctic Skipper, Least Skipper, Garita Skipperling, European Skipper, Fiery Skipper, Common Branded Skipper, Western Branded Skipper, Plains Skipper, Leonard's Skipper, Dakota Skipper, Indian Skipper, Nevada Skipper, Peck's Skipper, Sandhill Skipper, Draco Skipper, Tawny-edged Skipper, Crossline Skipper, Long Dash Skipper, Rhesus Skipper, Sonoran Skipper, Whirlabout, Northern Broken-Dash, Little Glassywing, Sachem, Delaware Skipper, Woodland Skipper, Hobomok Skipper, Dusted Skipper, Pepper and Salt Skipper, Common Roadside Skipper, Ocola Skipper, Subfamily Satyrinae, Northern Pearly-Eye, Little Wood-Satyr, Common Ringlet, Great Basin Wood-Nymph, Small Wood-Nymph, Genus Erebia, Vidler's Alpine, Disa Alpine, Taiga Alpine, Magdalena Alpine, Mt. McKinley Alpine, Yellow-dotted Alpine, Four-dotted Alpine, Common Alpine, Ridings' Satyr, Genus Oeneis, Great Arctic, Macoun's Arctic, Chryxus Arctic, Uhler's Arctic, Alberta Arctic, White-Veined Arctic, Jutta Arctic, Melissa Arctic, and Polixenes Arctic

Grass, Barnyard,

see Long Dash Skipper

Grass, Bent,

see Common Roadside Skipper

Grass, Bermuda,

see Sandhill Skipper and Sachem

Grass, Blue (Poa pratensisand Poa agassizensissee Least Skipper, Juba Skipper, Common Branded Skipper, Sandhill Skipper, Tawny-edged Skipper, Long Dash Skipper, Hobomok Skipper, Little Wood-Satyr, and Common Ringlet

Grass, Brome,

see Western Branded Skipper

Grass, Canary Reed,

see Least Skipper

Grass, Canby's Blue,

see Red-disked Alpine

Grass, Couch,

see European Skipper

Grass, Crab,

see Tawny-edged Skipper, Northern Broken-Dash, Sachem

Grass, False Melic,

see Northern Pearly-Eye

Grass, Fluff,

see Pahaska Skipper

Grass, Indian (Sorghastrum nutansand Sorghastrum secundumsee Pepper and Salt Skipper

Grass, June,

see Plains Skipper

Grass, Kentucky Blue,

see Pepper and Salt Skipper and Common Roadside Skipper

Grass, Lawn,

see Fiery Skipper

Grass, Meadow (Poa alpinaand Poa glaucasee Red-disked Alpine

Grass, Panic (Panicum clandestinumand Panicum dichotomumsee Leonard's Skipper, Indian Skipper, Tawny-edged Skipper, Northern Broken-Dash, and Hobomok Skipper

Grass, Poverty,

see Indian Skipper and Chryxus Arctic

Grass, Purpletop (see also Redtop Grass),

see Dun Skipper and Common Wood-Nymph

Grass, Quack,

see Long Dash Skipper

Grass, Redtop (see also Purpletop Grass),

see Crossline Skipper and Little Glassywing

Grass, Rye,

see Western Branded Skipper

Grass, Timothy,

see European Skipper and Long Dash Skipper

Grass, Woolly Beard,

see Delaware Skipper

Green Milkweed,

see Monarch

Groundnut,

see Silver-spotted Skipper

H

Hackberry (Celtis occidentalisand Celtis tenuifolia,

see American Snout, Mourning Cloak, Subfamily Apaturinae, and Hackberry Emperor

Hairgrass,

see Juba Skipper

Hawthorn,

see Hickory Hairstreak, Striped Hairstreak, and Southern Hairstreak

Hazelnut, Beaked,

see Early Hairstreak

Heart-leaved Alexander,

see Black Swallowtail

Heath family,

see Subfamily Coliadinae

Hedge Mustard,

see Spring White and Olympia Marble

Hedysarum spp.,

see Christina Sulphur and Johansen's Sulphur

Helianthus spp.,

see Gorgone Checkerspot, Silvery Checkerspot, and Painted Lady

Heracleum spp.,

see Short-tailed Swallowtail and Anise Swallowtail

Hickory,

see Banded Hairstreak

Hickory, Bitternut,

see

Hog Peanut,

see Silver-spotted Skipper and Northern Cloudywing

Hollyhock,

see West Coast Lady

Honeysuckle, Bracted,

see Gillette's Checkerspot

Hop,

see Grey Hairstreak, Question Mark, Eastern Comma, and Red Admiral

Hop Tree,

see Giant Swallowtail and Eastern Tiger Swallowtail

Horkelia spp.,

see Two-banded Checkered Skipper

Humulus lupulus,

see Grey Hairstreak, Question Mark and Eastern Comma

I

Idaho Fescue,

see Sonoran Skipper

Indian Grass,

see Pepper and Salt Skipper

Indian Paintbrush,

see Northern Checkerspot, Variable Checkerspot and Edith's Checkerspot

Indigo, False,

see Silver-spotted Skipper and Hoary Edge

Indigo, Wild,

see Wild Indigo Duskywing, Frosted Elfin

J

Jack Pine,

see Eastern Pine Elfin

Jointed Rush,

see Jutta Arctic

Juglans cinerea,

see Banded Hairstreak and Hickory Hairstreak

Juncaceae,

see Mt. McKinley Alpine

Juncus articulatus,

see Jutta Arctic

June Grass,

see Plains Skipper

Juniper, Creeping,

see Juniper Hairstreak

Juniper, Rocky Mountain,

see Rosner's Hairstreak and Barry's Hairstreak

Juniperus horizontalis,

see Juniper Hairstreak

Juniperus scopulorum,

see Rosner's Hairstreak and Barry's Hairstreak

Juniperus virginiana,

see Juniper Hairstreak

K

Kalmia angustifolia,

see Northern Blue

Kentucky Blue Grass,

see Pepper and Salt Skipper and Common Roadside Skipper

Knapweed,

see Painted Lady

Knotweed,

see Bronze Copper and Purplish Copper

Knotweed, Douglas's,

see Lilac-bordered Copper and Mariposa Copper

Koeleria cristata,

see Plains Skipper

L

Labrador Tea,

see Brown Elfin and Northern Blue

Lamb's Quarters,

see Hayhurst's Scallopwing and Common Sootywing

Lance-leafed Stonecrop,

see Rocky Mountain Parnassian

Laportea canadensis,

see Eastern Comma and Red Admiral

Lathyrus japonicus,

see Silvery Blue

Lathyrus spp.,

see Western Sulphur, Western Tailed Blue, Silvery Blue, and Northern Blue

Laurel, Sheep,

see Northern Blue

Leatherleaf,

see Brown Elfin

Ledum groenlandicum,

see Brown Elfin and Northern Blue

Leersia oryzoides(see also Fabaceae),

see Least Skipper and Peck's Skipper

Leguminosae,

see Subfamily Pyrginae, Subfamily Coliadinae, Subfamily Polyommatinae

Leptoloma cognatum,

see Ottoe Skipper

Lespedeza spp.,

see Hoary Edge

Licorice, Wild,

see Silver-spotted Skipper

Ligusticum scoticum,

see Short-tailed Swallowtail and Old World Swallowtail

Linaria spp.,

see Common Buckeye

Lindera benzoin,

see Spicebush Swallowtail

Linum spp.,

see Variegated Fritillary

Liriodendron tulipifera,

see Eastern Tiger Swallowtail and Spicebush Swallowtail

Little Bluestem,

see Ottoe Skipper, Indian Skipper, Crossline Skipper, and Dusted Skipper

Locust, Black,

see Silver-spotted Skipper

Lodgepole Pine,

see Western Pine Elfin

Lolium spp.,

see Western Branded Skipper

Lomatium spp.,

see Indra Swallowtail

Lonicera involucrata,

see Gillette's Checkerspot

Lotus spp.,

see Silvery Blue

Lousewort,

see Edith's Checkerspot

Low Milkweed,

see Monarch

Lupine,

see Afranius Duskywing, Western Sulphur, Sooty Hairstreak, Arrowhead Blue, Boisduval's Blue, and West Coast Lady

Lupine, Wild,

see Persius Duskywing, Frosted Elfin, and Melissa Blue

Lupinus perennis,

see Persius Duskywing, Frosted Elfin, and Melissa Blue

Lupinus spp.,

see Afranius Duskywing, Western Sulphur, Sooty Hairstreak, Arrowhead Blue, Northern Blue, Melissa Blue, Boisduval's Blue, Shasta Blue, and West Coast Lady

M

Machaeranthera spp.,

see Sagebrush Checkerspot

Mallow,

see Common Checkered Skipper and West Coast Lady

Mallow, Alkali,

see Common Checkered Skipper

Malva spp.,

see West Coast Lady

Malvaceae,

see Subfamily Pyrginae, Small Checkered Skipper, and Common Checkered Skipper

Marigold,

see Dainty Sulphur

Meadow Grass Poa alpinaand Poa glaucasee Red-disked Alpine

Meadow Parsnip,

see Old World Swallowtail

Meadowsweet,

see Summer Azure

Medicago sativa,

see Silvery Blue

Melilotus alba,

see Marine Blue and Silvery Blue

Mesquite,

see Reakirt's Blue

Milk-vetch,

see Queen Alexandra's Sulphur and Silvery Blue

Milk-vetch, Alpine,

see Hecla Sulphur and Labrador Sulphur

Milkweed family,

see Subfamily Danainae

Milkweed, Common,

see Monarch

Milkweed, Green,

see Monarch

Milkweed, Low,

see Monarch

Milkweed, Showy,

see Monarch

Milkweed, Swamp,

see Monarch

Mistletoe, Dwarf (Arceuthobium spp. and Viscaceae),

see Thicket Hairstreak

Mistletoe, Western Dwarf,

see Johnson's Hairstreak

Mountain Avens,

see Polaris Fritillary and Alberta Fritillary

Mountain Sorrel,

see American Copper and Lustrous Copper

Mountain Whitethorn,

see Pacuvius Duskywing

Mustard family,

see Becker's White, Spring White, Checkered White, Mustard White, Cabbage White, Large Marble, Desert Marble, Pacific Orangetip, and Stella Orangetip

Mustard,

see Checkered White, Great Southern White, and Northern Marble

Mustard, Hedge,

see Spring White and Olympia Marble

Mustard, Tower,

see Large Marble

Mustard, Tumble,

see Western White and Large Marble

Myricaceae,

see Grey Hairstreak

N

Nannyberry,

see Cherry Gall Azure

Needlegrass,

see Uncas Skipper, Plains Skipper, and Common Ringlet

Needlegrass, Western,

see Nevada Skipper

Nettle,

see Subfamily Nymphalinae and Satyr Comma

Nettle, Stinging,

see Question Mark, Eastern Comma, Satyr Comma, Milbert's Tortoiseshell, West Coast Lady, and Red Admiral

Nettle, Wood,

see Eastern Comma and Red Admiral

New Jersey Tea,

see Mottled Duskywing and Summer Azure

Nodding Fescue,

see Indian Skipper

Northern Prickly Ash,

see Giant Swallowtail

Nuttall's Yellow Violet,

see Edwards' Fritillary

O

Oak,

see Dreamy Duskywing, Juvenal's Duskywing, Horace's Duskywing, California Hairstreak, Coral Hairstreak, Edwards' Hairstreak, Striped Hairstreak, Southern Hairstreak, White-M Hairstreak, Early Hairstreak, and White Admiral

Oak, Black,

see Edwards' Hairstreak

Oak, Bur,

see Sleepy Duskywing and Edwards' Hairstreak

Oak, Garry,

see Propertius Duskywing

Oak, Red,

see Edwards' Hairstreak and Hickory Hairstreak

Oak, White,

see Edwards' Hairstreak and Southern Hairstreak

Oats, Cultivated,

see Common Roadside Skipper

Oats, Wild,

see Common Wood-Nymph

Oval-leaved Redroot,

see Mottled Duskywing

Oxyria digyna,

see American Copper

P

Panic Grass (Panicum clandestinumand Panicum dichotomumsee Leonard's Skipper, Indian Skipper, Tawny-edged Skipper, Northern Broken-Dash, and Hobomok Skipper

Panicum clandestinum,

see Northern Broken-Dash

Panicum dichotomum,

see Northern Broken-Dash

Panicum spp.,

see Leonard's Skipper, Indian Skipper, Tawny-edged Skipper, and Hobomok Skipper

Panicum virgatum,

see Delaware Skipper

Pansy,

see Variegated Fritillary

Parsley,

see Black Swallowtail

Parsley family,

see Black Swallowtail, Short-tailed Swallowtail, Old World Swallowtail, Anise Swallowtail, and Indra Swallowtail

Parsnip, Meadow,

see Old World Swallowtail

Parsnip-flowered Buckwheat,

see Western Green Hairstreak

Passiflora spp.,

see Gulf Fritillary and Mexican Fritillary

Passion flower,

see Gulf Fritillary and Mexican Fritillary

Pawpaw,

see Zebra Swallowtail

Pea family,

see Silver-spotted Skipper, Cloudless Sulphur, Orange-barred Sulphur, and Mexican Yellow

Pea, Beach,

see Silvery Blue

Pea, Wild,

see Western Tailed Blue and Silvery Blue

Pedicularis spp.,

see Edith's Checkerspot

Penstemon spp.,

see Variable Checkerspot

Petasites spp.,

see Old World Swallowtail

Phalaris arundinacea,

see Least Skipper

Phleum pratense,

see European Skipper and Long Dash Skipper

Picea mariana,

see Bog Elfin and Western Pine Elfin

Pine,

see Eastern Pine Elfin

Pine, Jack,

see Eastern Pine Elfin

Pine, Lodgepole,

see Western Pine Elfin

Pine, Ponderosa,

see Pine White

Pine, White,

see Eastern Pine Elfin

Pinus banksiana,

see Eastern Pine Elfin

Pinus contorta,

see Western Pine Elfin

Pinus ponderosa,

see Pine White

Pinus strobus,

see Eastern Pine Elfin

Plantago spp.,

see Variegated Fritillary, Variable Checkerspot, Edith's Checkerspot, and Common Buckeye

Plantain,

see Variegated Fritillary, Variable Checkerspot, Edith's Checkerspot, and Common Buckeye

Plum,

see Coral Hairstreak, Striped Hairstreak, Henry's Elfin, and Lorquin's Admiral

Poa agassizensis,

see Juba Skipper

Poa alpina,

see Red-disked Alpine

Poa canbyi,

see Red-disked Alpine

Poa glauca,

see Red-disked Alpine

Poa pratensis,

see Juba Skipper, Sandhill Skipper, Pepper and Salt Skipper, Common Roadside Skipper, Little Wood-Satyr, and Common Ringlet

Poa spp.,

see Least Skipper, Common Branded Skipper, Tawny-edged Skipper, Long Dash Skipper, Hobomok Skipper

Polygonaceae,

see Blue Copper, Purplish Copper, Western Green Hairstreak, Sheridan's Hairstreak, Lupine Blue, and Mormon Metalmark

Polygonum bistortoides,

see Arctic Fritillary

Polygonum douglasii,

see Lilac-bordered Copper and Mariposa Copper

Polygonum spp.,

see Bronze Copper, Dorcas Copper, and Purplish Copper

Polygonum viviparum,

see Mountain Fritillary and Bog Fritillary

Ponderosa Pine,

see Pine White

Poplar,

see Dreamy Duskywing, Persius Duskywing, Canadian Tiger Swallowtail, Western Tiger Swallowtail, Striped Hairstreak, Compton Tortoiseshell, White Admiral, Viceroy, Weidemeyer's Admiral, and Lorquin's Admiral

Populus spp.,

see Canadian Tiger Swallowtail, Compton Tortoiseshell, Mourning Cloak, Subfamily Limenitidinae, White Admiral, Viceroy, Weidemeyer's Admiral, and Lorquin's Admiral

Potentilla anserina,

see Maritime Copper

Potentilla drummondii,

see Two-banded Checkered Skipper

Potentilla egedii,

see Maritime Copper

Potentilla fruticosa,

see Dorcas Copper and Maritime Copper

Potentilla spp.,

see Grizzled Skipper

Poverty Grass,

see Indian Skipper and Chryxus Arctic

Primulaceae,

see Arctic Blue

Prosopis spp.,

see Reakirt's Blue

Prunus spp.,

see Eastern Tiger Swallowtail, Canadian Tiger Swallowtail, Pale Swallowtail, California Hairstreak, Coral Hairstreak, Striped Hairstreak, Henry's Elfin, Spring Azure, White Admiral, and Lorquin's Admiral

Prunus virginiana,

see Cherry Gall Azure

Pseudotsuga menziesii,

see Pine White

Ptelea trifoliata,

see Giant Swallowtail and Eastern Tiger Swallowtail

Purpletop Grass (see also Redtop Grass),

see Dun Skipper and Common Wood-Nymph

Purshia tridentata,

see Behr's Hairstreak and California Hairstreak

Q

Quack Grass,

see Long Dash Skipper

Queen Anne's Lace,

see Black Swallowtail

Quercus alba,

see Edwards' Hairstreak and Southern Hairstreak

Quercus garryana,

see Propertius Duskywing

Quercus macrocarpa,

see Sleepy Duskywing and Edwards' Hairstreak

Quercus rubra,

see Edwards' Hairstreak and Hickory Hairstreak

Quercus spp.,

see Juvenal's Duskywing, Horace's Duskywing, California Hairstreak, Coral Hairstreak, White-M Hairstreak, Early Hairstreak, and White Admiral

Quercus velutina,

see Edwards' Hairstreak

R

Rabbit-brush,

see Northern Checkerspot

Ranunculaceae,

see Columbine Duskywing

Red Oak,

see Edwards' Hairstreak and Hickory Hairstreak

Red Clover,

see Eastern Tailed Blue

Redroot,

see California Tortoiseshell

Redroot, Oval-leaved,

see Mottled Duskywing

Redtop Grass (see also Purpletop Grass),

see Crossline Skipper and Little Glassywing

Rhamnaceae,

see Genus Erynnis, Mottled Duskywing, Pale Swallowtail, Hedgerow Hairstreak, and Henry's Elfin

Rhamnus frangula,

see Henry's Elfin

Rhododendron spp.,

see Hoary Comma

Ribes spp.,

see Hoary Comma and Oreas Comma

Rice Cutgrass,

see Least Skipper and Peck's Skipper

Robinia pseudo-acacia,

see Silver-spotted Skipper

Rock Cress,

see Spring White, Mustard White, and Olympia Marble

Rocky Mountain Juniper,

see Rosner's Hairstreak and Barry's Hairstreak

Rosaceae,

see Two-banded Checkered Skipper, Pale Swallowtail, Behr's Hairstreak, Striped Hairstreak, and Moss's Elfin

Roseroot,

see Phoebus Parnassian

Rubus chamaemorus,

see Grizzled Skipper

Rudbeckia hirta,

see Gorgone Checkerspot

Rudbeckia spp.,

see Silvery Checkerspot

Rumex acetosella,

see American Copper

Rumex crispus,

see American Copper, Grey Copper, and Bronze Copper

Rumex occidentalis,

see Grey Copper

Rumex orbiculatus,

see Bronze Copper

Rumex spp.,

see Lustrous Copper, Ruddy Copper, Dorcas Copper, and Purplish Copper

Rumex venosus,

see Ruddy Copper

Rush,

see Genus Erebia, Mt. McKinley Alpine, and Yellow-dotted Alpine

Rush, Jointed,

see Jutta Arctic

Rye Grass,

see Western Branded Skipper

S

Salicaceae,

see Subfamily Pyrginae, Genus Erynnis, Persius Duskywing, and Subfamily Coliadinae

Salix herbacea,

see Dingy Fritillary

Salix spp.,

see Canadian Tiger Swallowtail, Giant Sulphur, Acadian Hairstreak, Sylvan Hairstreak, Frigga Fritillary, Arctic Fritillary, Green Comma, Compton Tortoiseshell, Mourning Cloak, Subfamily Limenitidinae, White Admiral, Viceroy, Weidemeyer's Admiral, and Lorquin's Admiral

Salt-Meadow Cordgrass,

see Maritime Ringlet

Sand Dock,

see Bronze Copper

Sarsaparilla, Bristly,

see Cherry Gall Azure

Saskatoon,

see California Hairstreak and Coral Hairstreak

Sassafras,

see Spicebush Swallowtail

Sassafras albidum,

see Spicebush Swallowtail

Saxifraga bronchialis,

see Astarte Fritillary

Saxifraga oppositifolia,

see Arctic Blue

Saxifragaceae,

see Arctic Blue

Saxifrage, Spotted,

see Astarte Fritillary

Schizachne purpurascens,

see Northern Pearly-Eye

Scotch Lovage,

see Short-tailed Swallowtail and Old World Swallowtail

Scrophulariaceae,

see Subfamily Melitaeinae, Northern Checkerspot, and Common Buckeye

Sedge,

see Subfamily Hesperiinae, Poweshiek Skipperling, Mulberry Wing, Broad-winged Skipper, Dion Skipper, Dukes' Skipper, Two-spotted Skipper, Dun Skipper, Subfamily Satyrinae, Eyed Brown, Appalachian Brown, Genus Erebia, Ross's Alpine, Disa Alpine, Taiga Alpine, Mt. McKinley Alpine, Banded Alpine, Red-disked Alpine, Yellow-dotted Alpine, Four-dotted Alpine, Genus Oeneis, Macoun's Arctic, White-Veined Arctic, Jutta Arctic, Melissa Arctic, and Polixenes Arctic

Sedum lanceolatum,

see Rocky Mountain Parnassian

Sedum roseum,

see Phoebus Parnassian

Sedum spp.,

see Phoebus Parnassian, Rocky Mountain Parnassian, Moss's Elfin, and Variegated Fritillary

Senna,

see Sleepy Orange

Sheep Fescue,

see Nevada Skipper

Sheep Laurel,

see Northern Blue

Sheep Sorrel,

see American Copper

Showy Milkweed,

see Monarch

Showy Tick-trefoil,

see Silver-spotted Skipper

Shrubby Cinquefoil,

see Dorcas Copper

Sida hederacea,

see Small Checkered Skipper

Silverweed,

see Maritime Copper

Sisymbrium altissimum,

see Western White and Large Marble

Sisymbrium officinale,

see Olympia Marble

Sisymbrium spp.,

see Spring White

Slender Spike-Rush,

see Poweshiek Skipperling

Small Blue Aster,

see Northern Crescent

Small Cranberry,

see Bog Fritillary

Snapdragon,

see Common Buckeye

Snow Buckwheat,

see Mormon Metalmark

Snowberry,

see Variable Checkerspot

Snowberry, Creeping,

see Bog Fritillary

Solidago multiradiata,

see Damoetas Checkerspot

Sorghastrum nutans,

see Pepper and Salt Skipper

Sorghastrum secundum,

see Pepper and Salt Skipper

Sorrel, Mountain,

see American Copper

Sorrel, Sheep,

see American Copper

Spartina patens,

see Maritime Ringlet

Spicebush,

see Spicebush Swallowtail

Spikegrass,

see Pepper and Salt Skipper and Common Roadside Skipper

Spiraea spp.,

see Summer Azure

Spotted Saxifrage,

see Astarte Fritillary

Spruce, Black,

see Bog Elfin

Stinging Nettle,

see Question Mark, Eastern Comma, Satyr Comma, Milbert's Tortoiseshell, West Coast Lady, and Red Admiral

Stinkweed,

see Western White

Stipa occidentalis,

see Nevada Skipper

Stipa spp.,

see Uncas Skipper, Plains Skipper, and Common Ringlet

Stonecrop,

see Phoebus Parnassian, Rocky Mountain Parnassian, Moss's Elfin, and Variegated Fritillary

Sulphur Umbrella Plant,

see Sheridan's Hairstreak

Sunflower,

see Gorgone Checkerspot, Silvery Checkerspot, and Painted Lady

Swamp Milkweed,

see Monarch

Swamp Thistle,

see Family Riodinidae

Sweet Clover, White,

see Marine Blue, Silvery Blue

Sweetfern,

see Western Pine Elfin

Sweet-vetch,

see Christina Sulphur and Johansen's Sulphur

Switchgrass,

see Little Glassywing

Symphoricarpos spp.,

see Variable Checkerspot

T

Thistle,

see Pale Crescent and Painted Lady

Thistle, Swamp,

see Family Riodinidae

Thlaspi arvense,

see Western White

Thuja plicata,

see Rosner's Hairstreak

Tick-trefoil,

see Hoary Edge and Wild Indigo Duskywing

Tick-trefoil, Showy,

see Silver-spotted Skipper

Timothy Grass,

see European Skipper and Long Dash Skipper

Toadflax,

see Common Buckeye

Toothwort,

see Mustard White and West Virginia White

Tower Mustard,

see Large Marble

Trailing Arbutus,

see Hoary Elfin

Trefoil,

see Silvery Blue

Tridens flavus,

see Crossline Skipper, Little Glassywing, Dun Skipper, and Common Wood-Nymph

Trifolium hybridum,

see Greenish Blue

Trifolium pratense,

see Reakirt's Blue and Greenish Blue

Trifolium repens,

see Reakirt's Blue and Greenish Blue

Trifolium spp.,

see Shasta Blue

Tulip Tree,

see Eastern Tiger Swallowtail and Spicebush Swallowtail

Tumble Mustard,

see Western White and Large Marble

Tumbleweed,

see Common Sootywing

Turnip,

see Checkered White

Turtlehead,

see Baltimore Checkerspot

U

Ulmus spp.,

see Question Mark, Eastern Comma, Hoary Comma, and Mourning Cloak

Umbelliferae,

see Black Swallowtail

Uniola latifolia,

see Pepper and Salt Skipper and Common Roadside Skipper

Urtica dioica,

see Question Mark and Satyr Comma

Urtica spp.,

see Eastern Comma, Milbert's Tortoiseshell, West Coast Lady, and Red Admiral

Urticaceae,

see Subfamily Nymphalinae

V

Vaccinium arbuscula,

see Mariposa Copper

Vaccinium caespitosum,

see Pelidne Sulphur and Silvery Blue

Vaccinium macrocarpon,

see Bog Copper

Vaccinium oxycoccus,

see Bog Copper and Mormon Fritillary

Vaccinium spp.,

see Pelidne Sulphur, Pink-edged Sulphur, Striped Hairstreak, Brown Elfin, Henry's Elfin, Spring Azure, Cranberry Blue, Freija Fritillary, and Green Comma

Vaccinium uliginosum,

see Pelidne Sulphur and Dingy Fritillary

Vetch,

see Western Sulphur

Vetch, Cow,

see Reakirt's Blue and Silvery Blue

Vetchling,

see Western Sulphur

Viburnum,

see Spring Azure and Summer Azure

Viburnum lentago,

see Cherry Gall Azure

Viburnum spp.,

see Spring Azure and Summer Azure

Vicia cracca,

see Reakirt's Blue and Silvery Blue

Vicia spp.,

see Western Sulphur

Viola nuttallii,

see Edwards' Fritillary

Viola spp., see Subfamily Arhynninae and Variegated Fritillary

Violet,

see Subfamily Arhynninae, Variegated Fritillary, Great Spangled Fritillary, Regal Fritillary, Edwards' Fritillary, Bog Fritillary, Silver-bordered Fritillary, Meadow Fritillary, Pacific Fritillary, and Arctic Fritillary

Violet, Nuttall's Yellow,

see Edwards' Fritillary

Viscaceae,

see Thicket Hairstreak

W

Walnut,

see Banded Hairstreak

Water Dock,

see Bronze Copper

Western Bistort,

see Arctic Fritillary

Western Dock,

see Grey Copper

Western Dwarf Mistletoe,

see Johnson's Hairstreak

Western Needlegrass,

see Nevada Skipper

Western Red Cedar,

see Rosner's Hairstreak

White Ash,

see Hickory Hairstreak

White Clover,

see Eastern Tailed Blue and Greenish Blue

White Oak,

see Edwards' Hairstreak and Southern Hairstreak

White Pine,

see Henry's Elfin

White Sweet Clover,

see Early Hairstreak and Silvery Blue

Wild Indigo,

see Wild Indigo Duskywing and Frosted Elfin

Licorice,

see Silver-spotted Skipper

Lupine,

see Persius Duskywing, Frosted Elfin, and Melissa Blue

Wild Oats,

see Common Wood-Nymph

Wild Pea,

see Western Tailed Blue and Silvery Blue

Wild Plum,

see Coral Hairstreak

Willow,

see Dreamy Duskywing, Persius Duskywing, Canadian Tiger Swallowtail, Subfamily Coliadinae, Giant Sulphur, Acadian Hairstreak, Sylvan Hairstreak, Striped Hairstreak, Bog Fritillary, Frigga Fritillary, Arctic Fritillary, Green Comma, Compton Tortoiseshell, Mourning Cloak, Subfamily Limenitidinae, White Admiral, Viceroy, Weidemeyer's Admiral, and Lorquin's Admiral

Willow, Dwarf,

see Dingy Fritillary

Witchgrass, Fall,

see Ottoe Skipper

Wood Nettle,

see Eastern Comma and Red Admiral

Woolly Beard Grass,

see Little Glassywing

Wormwood,

see Painted Lady

Y

Zanthoxylum americanum,

see Giant Swallowtail

Z

Zizia aptera,

see Black Swallowtail and Old World Swallowtail

Reproduced with permission from The Butterflies of Canada by Ross A. Layberry, Peter W. Hall, and J. Donald Lafontaine. University of Toronto Press; 1998. Specimen photos courtesy of John T. Fowler.