38 wildflowers were recorded blooming in Wyoming in May in our iNaturalist sample; 11 of the top 50 are at their peak this month. The list is ranked by number of research-grade observations.
Top wildflowers in May
Arrowleaf Balsamroot
Yellow Fritillary
Prairie Pasqueflower
Longhorn Steer's-Head
Creeping Mahonia
Glacier Lily
Sagebrush Buttercup
Common Dandelion
Spotted Fritillary
Virginia strawberry
Saskatoon
Edible Valerian
All wildflowers blooming in Wyoming in May
| # | Species | Scientific name | Family | Obs. | Peak in state |
|---|---|---|---|---|---|
| 1 | Arrowleaf Balsamroot | Balsamorhiza sagittata | Sunflowers, Daisies, Asters, and Allies | 163 | Jun (rising) |
| 2 | Yellow Fritillary | Fritillaria pudica | lily family | 150 | May (peak) |
| 3 | Prairie Pasqueflower | Pulsatilla nuttalliana | buttercup family | 123 | May (peak) |
| 4 | Longhorn Steer's-Head | Dicentra uniflora | Poppy Family | 33 | May (peak) |
| 5 | Creeping Mahonia | Berberis repens | barberry family | 32 | Jun (rising) |
| 6 | Glacier Lily | Erythronium grandiflorum | lily family | 31 | Jun (rising) |
| 7 | Sagebrush Buttercup | Ranunculus glaberrimus | buttercup family | 30 | Apr (past peak) |
| 8 | Common Dandelion | Taraxacum officinale | Sunflowers, Daisies, Asters, and Allies | 24 | May (peak) |
| 9 | Spotted Fritillary | Fritillaria atropurpurea | lily family | 23 | Jun (rising) |
| 10 | Virginia strawberry | Fragaria virginiana | rose family | 22 | Jun (rising) |
| 11 | Saskatoon | Amelanchier alnifolia | rose family | 19 | Jun (rising) |
| 12 | Edible Valerian | Valeriana edulis | honeysuckle family | 18 | Jun (rising) |
| 13 | Bearberry | Arctostaphylos uva-ursi | heath family | 16 | Jun (rising) |
| 14 | Common Starlily | Leucocrinum montanum | agave and allies | 13 | Apr (past peak) |
| 15 | Prairie Smoke | Geum triflorum | rose family | 13 | Jun (rising) |
| 16 | Narrowleaf Puccoon | Lithospermum incisum | borage family | 10 | May (peak) |
| 17 | Field Penny-Cress | Thlaspi arvense | mustard family | 9 | Jun (rising) |
| 18 | Golden Currant | Ribes aureum | Gooseberry Family | 7 | Jun (rising) |
| 19 | Scarlet Globemallow | Sphaeralcea coccinea | Mallow and Hibiscus Family | 7 | Jun (rising) |
| 20 | Seep Monkeyflower | Erythranthe guttata | lopseed family | 7 | Jul (rising) |
| 21 | Bitterroot | Lewisia rediviva | Pussypaw Family | 4 | Jun (rising) |
| 22 | Redstem Stork's-bill | Erodium cicutarium | Geranium family | 4 | May (peak) |
| 23 | Star-Flowered Lily-Of-The-Valley | Maianthemum stellatum | agave and allies | 4 | Jun (rising) |
| 24 | Small Camas | Camassia quamash | agave and allies | 4 | Jun (rising) |
| 25 | Upland Larkspur | Delphinium nuttallianum | buttercup family | 4 | Jun (rising) |
| 26 | Chokecherry | Prunus virginiana | rose family | 3 | Jun (rising) |
| 27 | Lesser hop trefoil | Trifolium dubium | Legumes | 2 | May (peak) |
| 28 | Lewis flax | Linum lewisii | Flax Family | 2 | Jun (rising) |
| 29 | Common Lilac | Syringa vulgaris | olive family | 2 | May (peak) |
| 30 | Dame's Rocket | Hesperis matronalis | mustard family | 1 | Jun (rising) |
| 31 | Box Elder | Acer negundo | soapberry family | 1 | Apr (past peak) |
| 32 | Red Baneberry | Actaea rubra | buttercup family | 1 | Jun (rising) |
| 33 | Woodland Strawberry | Fragaria vesca | rose family | 1 | May (peak) |
| 34 | Pineapple-Weed | Matricaria discoidea | Sunflowers, Daisies, Asters, and Allies | 1 | May (peak) |
| 35 | Yellow Salsify | Tragopogon dubius | Sunflowers, Daisies, Asters, and Allies | 1 | Jun (rising) |
| 36 | Shepherd's-Purse | Capsella bursa-pastoris | mustard family | 1 | May (peak) |
| 37 | Bastard Toadflax | Comandra umbellata | sandalwood family | 1 | Apr (past peak) |
| 38 | Twinberry Honeysuckle | Lonicera involucrata | honeysuckle family | 1 | Jun (rising) |