Black HillsWildflowers

All plants A to Z

Every plant in the guide, by common name.

Alfalfa (Medicago sativa)

Alfalfa

Medicago sativa

May–Aug · Introduced

Alumroot (Heuchera richardsonii)

Alumroot

Heuchera richardsonii

Jun–Jul · Native

Alyssum-leaf Phlox (Phlox alyssifolia)

Alyssum-leaf Phlox

Phlox alyssifolia

Apr–Jul · Native

Photo: Jody Shugart, CC BY 4.0

American Speedwell (Veronica americana)

American Speedwell

Veronica americana

May–Oct · Native

American Vetch (Vicia americana)

American Vetch

Vicia americana

May–Aug · Native

Photo: Jo Roberts, CC BY 4.0

Anise Hyssop (Agastache foeniculum)

Anise Hyssop

Agastache foeniculum

Jun–Sep · Native

Photo: Courtney Celley/USFWS, Public Domain

Aromatic Aster (Symphyotrichum oblongifolium)

Aromatic Aster

Symphyotrichum oblongifolium

Aug–Sep · Native

Arrowleaf Balsamroot (Balsamorhiza sagittata)

Arrowleaf Balsamroot

Balsamorhiza sagittata

May–Jul · Native

Arrowleaf Sweet Coltsfoot (Petasites frigidus var. sagittatus)

Arrowleaf Sweet Coltsfoot

Petasites frigidus var. sagittatus

May–Jun · Native

Bachelor's Button (Centaurea cyanus)

Bachelor's Button

Centaurea cyanus

Jun–Sep · Introduced

Bastard Toadflax (Comandra umbellata)

Bastard Toadflax

Comandra umbellata

May–Jul · Native

Beaked Hazelnut (Corylus cornuta)

Beaked Hazelnut

Corylus cornuta

Apr–May · Native

Black Henbane (Hyoscyamus niger)

Black Henbane

Hyoscyamus niger

Jun–Sep · Introduced

Black Hills Spruce (Picea glauca var. densata)

Black Hills Spruce

Picea glauca var. densata

May–Jun · Native

Photo: Caleb Catto, CC BY 4.0

Black Medic (Medicago lupulina)

Black Medic

Medicago lupulina

May–Aug · Introduced

Black-eyed Susan (Rudbeckia hirta)

Black-eyed Susan

Rudbeckia hirta

May–Sep · Native

Bladder Campion (Silene vulgaris)

Bladder Campion

Silene vulgaris

Jun–Oct · Introduced

Blanket Flower (Gaillardia aristata)

Blanket Flower

Gaillardia aristata

Jun–Sep · Native

Photo: Black Hills National Forest (photo by Chelsea Monks, USDA Forest Service/Black Hills National Forest), Public Domain

Blue Lettuce (Lactuca tatarica)

Blue Lettuce

Lactuca tatarica

Jun–Sep · Native

Blue-eyed Grass (Sisyrinchium montanum)

Blue-eyed Grass

Sisyrinchium montanum

May–Jul · Native

Buffalo Grass (Bouteloua dactyloides)

Buffalo Grass

Bouteloua dactyloides

Apr–Jun · Native

Photo: Matt Lavin, CC BY-SA 2.0

Bunchberry (Cornus canadensis)

Bunchberry

Cornus canadensis

May–Jul · Native

Bur Oak (Quercus macrocarpa)

Bur Oak

Quercus macrocarpa

Apr–May · Native

Photo: Bob Miller, CC BY 4.0

Butte Candle (Oreocarya celosioides)

Butte Candle

Oreocarya celosioides

May–Jul · Native

Butter-and-Eggs (Linaria vulgaris)

Butter-and-Eggs

Linaria vulgaris

Jun–Aug · Introduced

Canada Hawkweed (Hieracium umbellatum)

Canada Hawkweed

Hieracium umbellatum

Jun–Sep · Native

Canada Milkvetch (Astragalus canadensis)

Canada Milkvetch

Astragalus canadensis

May–Aug · Native

Canada Thistle (Cirsium arvense)

Canada Thistle

Cirsium arvense

Jul–Oct · Introduced

Photo: Sage, CC BY 4.0

Canada Violet (Viola canadensis)

Canada Violet

Viola canadensis

May–Aug · Native

Candle Anemone (Anemone cylindrica)

Candle Anemone

Anemone cylindrica

Jun–Jul · Native

Catnip (Nepeta cataria)

Catnip

Nepeta cataria

Jun–Sep · Introduced

Chicory (Cichorium intybus)

Chicory

Cichorium intybus

Jun–Oct · Introduced

Chokecherry (Prunus virginiana)

Chokecherry

Prunus virginiana

Apr–Jun · Native

Photo: mfeaver, CC BY 4.0

Clustered Broomrape (Aphyllon fasciculatum)

Clustered Broomrape

Aphyllon fasciculatum

Jun–Aug · Native

Common Juniper (Juniperus communis var. depressa)

Common Juniper

Juniperus communis var. depressa

May–Jun · Native

Photo: John Brew, CC BY 4.0

Common Mullein (Verbascum thapsus)

Common Mullein

Verbascum thapsus

Jun–Aug · Introduced

Common Starlily (Leucocrinum montanum)

Common Starlily

Leucocrinum montanum

Apr–Jun · Native

Photo: Brian Dickerson, CC0 1.0

Common Sunflower (Helianthus annuus)

Common Sunflower

Helianthus annuus

Jul–Oct · Native

Photo: Jo Roberts, CC BY 4.0

Common Tansy (Tanacetum vulgare)

Common Tansy

Tanacetum vulgare

Jul–Sep · Introduced

Photo: Laurel Meredyk, CC BY 4.0

Common Yarrow (Achillea millefolium)

Common Yarrow

Achillea millefolium

Jun–Sep · Native

Photo: Jared Shorma, CC BY 4.0

Corn Speedwell (Veronica arvensis)

Corn Speedwell

Veronica arvensis

May–Sep · Introduced

Cow Parsnip (Heracleum maximum)

Cow Parsnip

Heracleum maximum

Jun–Jul · Native

Crested Prickly Poppy (Argemone polyanthemos)

Crested Prickly Poppy

Argemone polyanthemos

May–Sep · Native

Curly Dock (Rumex crispus)

Curly Dock

Rumex crispus

Jun–Jul · Introduced

Curlycup Gumweed (Grindelia squarrosa)

Curlycup Gumweed

Grindelia squarrosa

Jul–Sep · Native

Cut-leaved Anemone (Anemone multifida)

Cut-leaved Anemone

Anemone multifida

May–Jun · Native

Cutleaf Coneflower (Rudbeckia laciniata)

Cutleaf Coneflower

Rudbeckia laciniata

Jul–Sep · Native

Dame's Rocket (Hesperis matronalis)

Dame's Rocket

Hesperis matronalis

May–Jun · Introduced

Dock (Rumex sp.)

Dock

Rumex sp.

Jun–Aug

Dotted Gayfeather (Liatris punctata)

Dotted Gayfeather

Liatris punctata

Jul–Sep · Native

Photo: Jim Pisarowicz (National Park Service), Public Domain

Downy Paintbrush (Castilleja sessiliflora)

Downy Paintbrush

Castilleja sessiliflora

May–Jul · Native

Photo: Brian Dickerson, CC0 1.0

Early Cinquefoil (Potentilla concinna)

Early Cinquefoil

Potentilla concinna

May–Jun · Native

Enchanter's Nightshade (Circaea alpina)

Enchanter's Nightshade

Circaea alpina

Jun–Aug · Native

Fairy Slipper (Calypso bulbosa var. americana)

Fairy Slipper

Calypso bulbosa var. americana

May–Jun · Native

Photo: John Gaskin, CC0 1.0

False Gromwell (Onosmodium bejariense)

False Gromwell

Onosmodium bejariense

May–Jul · Native

Fetid Marigold (Dyssodia papposa)

Fetid Marigold

Dyssodia papposa

Jul–Sep · Native

Field Chickweed (Cerastium arvense)

Field Chickweed

Cerastium arvense

May–Jul · Native

Photo: Brian Finzel, CC BY-SA 4.0

Field Milkvetch (Astragalus agrestis)

Field Milkvetch

Astragalus agrestis

Jun–Jul · Native

Fireweed (Chamaenerion angustifolium)

Fireweed

Chamaenerion angustifolium

Jun–Sep · Native

Photo: marek, CC0 1.0

Forget-me-not (Myosotis scorpioides)

Forget-me-not

Myosotis scorpioides

May–Sep · Introduced

Foxtail Barley (Hordeum jubatum)

Foxtail Barley

Hordeum jubatum

Jun–Aug · Native

Fringed Loosestrife (Lysimachia ciliata)

Fringed Loosestrife

Lysimachia ciliata

Jun–Aug · Native

Fringed Puccoon (Lithospermum incisum)

Fringed Puccoon

Lithospermum incisum

Apr–Jun · Native

Golden Currant (Ribes aureum)

Golden Currant

Ribes aureum

Apr–Jun · Native

Photo: psweet, CC BY-SA 4.0

Golden Pea (Thermopsis rhombifolia)

Golden Pea

Thermopsis rhombifolia

Apr–Jun · Native

Great Plains Yucca (Yucca glauca)

Great Plains Yucca

Yucca glauca

Jun–Jul · Native

Photo: Connor Haindfield, CC BY 4.0

Green Comet Milkweed (Asclepias viridiflora)

Green Comet Milkweed

Asclepias viridiflora

Jun–Aug · Native

Green Gentian (Frasera speciosa)

Green Gentian

Frasera speciosa

May–Aug · Native

Green-flowered Hedgehog Cactus (Echinocereus viridiflorus)

Green-flowered Hedgehog Cactus

Echinocereus viridiflorus

May–Jul · Native

Photo: Tom Norton, CC BY 4.0

Groundplum Milkvetch (Astragalus crassicarpus)

Groundplum Milkvetch

Astragalus crassicarpus

Apr–May · Native

Gunnison's Mariposa Lily (Calochortus gunnisonii)

Gunnison's Mariposa Lily

Calochortus gunnisonii

Jun–Aug · Native

Hairy Golden Aster (Heterotheca villosa)

Hairy Golden Aster

Heterotheca villosa

Jul–Sep · Native

Harebell (Campanula rotundifolia)

Harebell

Campanula rotundifolia

Jun–Sep · Native

Heart-leaved Arnica (Arnica cordifolia)

Heart-leaved Arnica

Arnica cordifolia

May–Aug · Native

Heartleaf Alexanders (Zizia aptera)

Heartleaf Alexanders

Zizia aptera

Apr–Jul · Native

Hoary Vervain (Verbena stricta)

Hoary Vervain

Verbena stricta

Jun–Sep · Native

Photo: Jim Pisarowicz, Public Domain

Hookedspur Violet (Viola adunca)

Hookedspur Violet

Viola adunca

Apr–Jul · Native

Photo: Brian Dickerson, CC0 1.0

Horseweed (Erigeron canadensis)

Horseweed

Erigeron canadensis

Jul–Oct · Native

Hound's Tongue (Cynoglossum officinale)

Hound's Tongue

Cynoglossum officinale

Jun–Jul · Introduced

Kinnikinnick (Arctostaphylos uva-ursi)

Kinnikinnick

Arctostaphylos uva-ursi

May–Jul · Native

Lambert's Crazyweed (Oxytropis lambertii)

Lambert's Crazyweed

Oxytropis lambertii

May–Jul · Native

Lambstongue Groundsel (Senecio integerrimus)

Lambstongue Groundsel

Senecio integerrimus

Jun–Aug · Native

Lanceleaf Bluebells (Mertensia lanceolata)

Lanceleaf Bluebells

Mertensia lanceolata

Apr–May · Native

Large Beardtongue (Penstemon grandiflorus)

Large Beardtongue

Penstemon grandiflorus

May–Jul · Native

Photo: NPS/Michael Wheeler, Public Domain

Laxmann's Milkvetch (Astragalus laxmannii var. robustior)

Laxmann's Milkvetch

Astragalus laxmannii var. robustior

Jun–Aug · Native

Photo: Ryan Donnelly, CC BY 4.0

Lead Plant (Amorpha canescens)

Lead Plant

Amorpha canescens

Jun–Jul · Native

Leafy Cinquefoil (Drymocallis fissa)

Leafy Cinquefoil

Drymocallis fissa

May–Aug · Native

Leafy Spurge (Euphorbia virgata)

Leafy Spurge

Euphorbia virgata

May–Aug · Introduced

Photo: John Brew, CC BY 4.0

Long-leaved Ground Cherry (Physalis longifolia)

Long-leaved Ground Cherry

Physalis longifolia

May–Aug · Native

Low Larkspur (Delphinium bicolor)

Low Larkspur

Delphinium bicolor

Apr–Jul · Native

Low Whitlow-wort (Paronychia sessiliflora)

Low Whitlow-wort

Paronychia sessiliflora

Native

Mat Rock Spiraea (Petrophytum caespitosum)

Mat Rock Spiraea

Petrophytum caespitosum

Jun–Aug · Native

Meadow Deathcamas (Toxicoscordion venenosum)

Meadow Deathcamas

Toxicoscordion venenosum

Apr–Jun · Native

Photo: Nick Block, CC BY 4.0

Missouri Foxtail Cactus (Pelecyphora missouriensis)

Missouri Foxtail Cactus

Pelecyphora missouriensis

May–Jun · Native

Photo: Larry Jensen, CC BY 4.0

Mosses

Mosses

Mountain Dandelion (Agoseris glauca)

Mountain Dandelion

Agoseris glauca

May–Jun · Native

Narrowleaf Beardtongue (Penstemon angustifolius)

Narrowleaf Beardtongue

Penstemon angustifolius

May–Jun · Native

Nodding Onion (Allium cernuum)

Nodding Onion

Allium cernuum

Jul–Sep · Native

Photo: Jason Leduc, CC0 1.0

Northern Bedstraw (Galium boreale)

Northern Bedstraw

Galium boreale

Jun–Sep · Native

Northern Bog Violet (Viola nephrophylla)

Northern Bog Violet

Viola nephrophylla

May–Jun · Native

Northern Gooseberry (Ribes oxyacanthoides)

Northern Gooseberry

Ribes oxyacanthoides

Apr–Jun · Native

Northern Paintbrush (Castilleja septentrionalis)

Northern Paintbrush

Castilleja septentrionalis

May–Aug · Native

Photo: Matt Berger, CC BY 4.0

Oregon Grape (Mahonia repens)

Oregon Grape

Mahonia repens

Apr–Jul · Native

Photo: Anders Hastings, CC BY 4.0

Oxeye Daisy (Leucanthemum vulgare)

Oxeye Daisy

Leucanthemum vulgare

May–Aug · Introduced

Paper Birch (Betula papyrifera)

Paper Birch

Betula papyrifera

Apr–May · Native

Photo: Caleb Catto, CC BY 4.0

Pasque Flower (Pulsatilla patens)

Pasque Flower

Pulsatilla patens

Mar–May · Native

Pearly Everlasting (Anaphalis margaritacea)

Pearly Everlasting

Anaphalis margaritacea

Jul–Aug · Native

Plains Prickly Pear (Opuntia polyacantha)

Plains Prickly Pear

Opuntia polyacantha

May–Jul · Native

Photo: Jack Wander, CC0 1.0

Ponderosa Pine (Pinus ponderosa var. scopulorum)

Ponderosa Pine

Pinus ponderosa var. scopulorum

May–Jun · Native

Photo: Jo Roberts, CC BY 4.0

Prairie Coneflower (Ratibida columnifera)

Prairie Coneflower

Ratibida columnifera

Jun–Sep · Native

Prairie Rose (Rosa arkansana)

Prairie Rose

Rosa arkansana

May–Aug · Native

Photo: David LaMagna, CC BY 4.0

Prairie Smoke (Geum triflorum)

Prairie Smoke

Geum triflorum

May–Jun · Native

Photo: NPS / Jacob W. Frank (Yellowstone National Park), Public Domain

Prairie Spiderwort (Tradescantia occidentalis)

Prairie Spiderwort

Tradescantia occidentalis

May–Aug · Native

Prairie Star (Lithophragma parviflorum)

Prairie Star

Lithophragma parviflorum

May–Jun · Native

Prairie Turnip (Pediomelum esculentum)

Prairie Turnip

Pediomelum esculentum

May–Jul · Native

Purple Coneflower (Echinacea angustifolia)

Purple Coneflower

Echinacea angustifolia

Jun–Aug · Native

Photo: National Park Service, Wind Cave National Park, Public Domain

Purple Prairie Clover (Dalea purpurea)

Purple Prairie Clover

Dalea purpurea

Jun–Sep · Native

Photo: Brian Dickerson, CC0 1.0

Quaking Aspen (Populus tremuloides)

Quaking Aspen

Populus tremuloides

Apr–May · Native

Red Baneberry (Actaea rubra)

Red Baneberry

Actaea rubra

May–Jun · Native

Photo: Brian Finzel, CC BY-SA 4.0

Red Columbine (Aquilegia canadensis)

Red Columbine

Aquilegia canadensis

May–Jul · Native

Photo: Nick Block, CC BY 4.0

Red Raspberry (Rubus idaeus subsp. strigosus)

Red Raspberry

Rubus idaeus subsp. strigosus

May–Jul · Native

Photo: Brian Dickerson, CC0 1.0

Richardson's Geranium (Geranium richardsonii)

Richardson's Geranium

Geranium richardsonii

Jun–Aug · Native

Rocky Mountain Bee Plant (Cleomella serrulata)

Rocky Mountain Bee Plant

Cleomella serrulata

Jun–Sep · Native

Photo: Jo Roberts, CC BY 4.0

Rocky Mountain Blazing Star (Liatris ligulistylis)

Rocky Mountain Blazing Star

Liatris ligulistylis

Jul–Sep · Native

Photo: Jo Roberts, CC BY 4.0

Rocky Mountain Iris (Iris missouriensis)

Rocky Mountain Iris

Iris missouriensis

May–Jul · Native

Photo: Forest Service - Northern Region (USDA Forest Service Photo/ Samsara Chapman Duffey), Public Domain

Rocky Mountain Juniper (Juniperus scopulorum)

Rocky Mountain Juniper

Juniperus scopulorum

Apr–May · Native

Photo: Jo Roberts, CC BY 4.0

Rough-fruited Fairybells (Prosartes trachycarpa)

Rough-fruited Fairybells

Prosartes trachycarpa

May–Jun · Native

Saskatoon Serviceberry (Amelanchier alnifolia)

Saskatoon Serviceberry

Amelanchier alnifolia

May–Jun · Native

Photo: John Gaskin, CC0 1.0

Scarlet Beeblossom (Oenothera suffrutescens)

Scarlet Beeblossom

Oenothera suffrutescens

May–Aug · Native

Photo: Brian Dickerson, CC0 1.0

Scarlet Globemallow (Sphaeralcea coccinea)

Scarlet Globemallow

Sphaeralcea coccinea

May–Sep · Native

Photo: National Park Service, Wind Cave National Park, Public Domain

Sego Lily (Calochortus nuttallii)

Sego Lily

Calochortus nuttallii

Jun–Jul · Native

Shooting Star (Primula pauciflora)

Shooting Star

Primula pauciflora

Apr–Jun · Native

Showy Milkweed (Asclepias speciosa)

Showy Milkweed

Asclepias speciosa

Jun–Jul · Native

Shrubby Cinquefoil (Dasiphora fruticosa)

Shrubby Cinquefoil

Dasiphora fruticosa

Jun–Aug · Native

Silverleaf Scurfpea (Pediomelum argophyllum)

Silverleaf Scurfpea

Pediomelum argophyllum

Jun–Sep · Native

Photo: William Michael O'Boyle, CC BY 4.0

Silvery Lupine (Lupinus argenteus)

Silvery Lupine

Lupinus argenteus

Jun–Sep · Native

Photo: Bob Miller, CC BY 4.0

Slender Beardtongue (Penstemon gracilis)

Slender Beardtongue

Penstemon gracilis

Jun–Aug · Native

Photo: Jo Roberts, CC BY 4.0

Slender Cinquefoil (Potentilla gracilis)

Slender Cinquefoil

Potentilla gracilis

Jun–Aug · Native

Small-flowered Columbine (Aquilegia brevistyla)

Small-flowered Columbine

Aquilegia brevistyla

May–Jul · Native

Photo: Todd Boland, CC BY 4.0

Smooth Beardtongue (Penstemon glaber)

Smooth Beardtongue

Penstemon glaber

May–Aug · Native

Photo: Jo Roberts, CC BY 4.0

Smooth Blue Aster (Symphyotrichum laeve)

Smooth Blue Aster

Symphyotrichum laeve

Jul–Oct · Native

Photo: Jason Leduc, CC0 1.0

Spearleaf Stonecrop (Sedum lanceolatum)

Spearleaf Stonecrop

Sedum lanceolatum

Jun–Aug · Native

Photo: Brian Finzel, CC BY-SA 4.0

Spinystar (Pelecyphora vivipara)

Spinystar

Pelecyphora vivipara

May–Aug · Native

Photo: Brian Finzel, CC BY-SA 4.0

Spotted Joe-Pye Weed (Eutrochium maculatum var. bruneri)

Spotted Joe-Pye Weed

Eutrochium maculatum var. bruneri

Jul–Sep · Native

Photo: Laurel Meredyk, CC BY 4.0

Spreading Dogbane (Apocynum androsaemifolium)

Spreading Dogbane

Apocynum androsaemifolium

Jun–Aug · Native

Photo: Matt Lavin, CC BY-SA 2.0

Starry False Solomon's Seal (Maianthemum stellatum)

Starry False Solomon's Seal

Maianthemum stellatum

May–Jul · Native

Photo: Brian Finzel, CC BY-SA 4.0

Stemless Four-nerve Daisy (Tetraneuris acaulis var. acaulis)

Stemless Four-nerve Daisy

Tetraneuris acaulis var. acaulis

May–Oct · Native

Photo: Brian Dickerson, CC0 1.0

Sticky Geranium (Geranium viscosissimum)

Sticky Geranium

Geranium viscosissimum

May–Aug · Native

Stiff Goldenrod (Solidago rigida)

Stiff Goldenrod

Solidago rigida

Jul–Oct · Native

Photo: Parker Hopkins, CC0 1.0

Stiff Sunflower (Helianthus pauciflorus)

Stiff Sunflower

Helianthus pauciflorus

Jul–Sep · Native

Stinging Nettle (Urtica gracilis)

Stinging Nettle

Urtica gracilis

Jun–Sep · Native

Photo: Brian Dickerson, CC0 1.0

Sweet-scented Bedstraw (Galium triflorum)

Sweet-scented Bedstraw

Galium triflorum

May–Aug · Native

Tall Cinquefoil (Drymocallis arguta)

Tall Cinquefoil

Drymocallis arguta

Jun–Aug · Native

Ten-petal Blazingstar (Mentzelia decapetala)

Ten-petal Blazingstar

Mentzelia decapetala

Jul–Sep · Native

Textile Onion (Allium textile)

Textile Onion

Allium textile

May–Jun · Native

Photo: Craig Martin, CC0 1.0

Thimbleberry (Rubus parviflorus)

Thimbleberry

Rubus parviflorus

Jun–Jul · Native

Photo: Owen McElroy, CC0 1.0

Threenerve Fleabane (Erigeron subtrinervis)

Threenerve Fleabane

Erigeron subtrinervis

Jul–Aug · Native

Twinflower (Linnaea borealis)

Twinflower

Linnaea borealis

Jun–Aug · Native

Photo: Owen McElroy, CC0 1.0

Wavyleaf Thistle (Cirsium undulatum)

Wavyleaf Thistle

Cirsium undulatum

Jun–Aug · Native

Photo: Jo Roberts, CC BY 4.0

Western Monkshood (Aconitum columbianum)

Western Monkshood

Aconitum columbianum

Native

Western Poison Ivy (Toxicodendron rydbergii)

Western Poison Ivy

Toxicodendron rydbergii

May–Jul · Native

Photo: Joey M, CC BY 4.0

White Beardtongue (Penstemon albidus)

White Beardtongue

Penstemon albidus

May–Jul · Native

White Sagebrush (Artemisia ludoviciana)

White Sagebrush

Artemisia ludoviciana

Aug–Oct · Native

Photo: Aaron Rasor, CC BY-SA 4.0

White Spirea (Spiraea betulifolia)

White Spirea

Spiraea betulifolia

Jun–Aug · Native

Wild Bergamot (Monarda fistulosa)

Wild Bergamot

Monarda fistulosa

Jun–Sep · Native

Photo: Jared Shorma, CC BY 4.0

Wild Blue Flax (Linum lewisii)

Wild Blue Flax

Linum lewisii

May–Aug · Native

Wild Licorice (Glycyrrhiza lepidota)

Wild Licorice

Glycyrrhiza lepidota

Jun–Aug · Native

Photo: Brian Dickerson, CC0 1.0

Wild Sarsaparilla (Aralia nudicaulis)

Wild Sarsaparilla

Aralia nudicaulis

May–Jul · Native

Photo: Seth G. Breeding, CC BY 4.0

Wild Strawberry (Fragaria virginiana)

Wild Strawberry

Fragaria virginiana

May–Jun · Native

Photo: Neal Herbert (NPS, Yellowstone National Park), Public Domain

Wood Lily (Lilium philadelphicum var. andinum)

Wood Lily

Lilium philadelphicum var. andinum

Jun–Aug · Native

Photo: Jason Hollinger, CC BY 2.0

Woodland Pinedrops (Pterospora andromedea)

Woodland Pinedrops

Pterospora andromedea

Jul–Aug · Native

Photo: Brian Dickerson, CC0 1.0

Woolly Groundsel (Packera cana)

Woolly Groundsel

Packera cana

May–Jul · Native

Wyoming Kittentails (Veronica wyomingensis)

Wyoming Kittentails

Veronica wyomingensis

Apr–Jun · Native

Photo: John Gaskin, CC0 1.0

Yellow Lady's Slipper (Cypripedium parviflorum)

Yellow Lady's Slipper

Cypripedium parviflorum

May–Jul · Native

Photo: Owen McElroy, CC0 1.0

Yellow Monkeyflower (Erythranthe guttata)

Yellow Monkeyflower

Erythranthe guttata

Apr–Sep · Native

Yellow Salsify (Tragopogon dubius)

Yellow Salsify

Tragopogon dubius

May–Aug · Introduced

Photo: NPS Photo, Public Domain

Yellow Sweetclover (Melilotus officinalis)

Yellow Sweetclover

Melilotus officinalis

Jun–Oct · Introduced

Photo: sophia_herrmeyer, CC BY 4.0