60 wildflowers were recorded blooming in South Dakota in June in our iNaturalist sample; 23 of the top 50 are at their peak this month. The list is ranked by number of research-grade observations.
Top wildflowers in June

Sego Lily

Field Bindweed

Showy Milkweed

Wood Lily

Dame's Rocket

Red Columbine

Scarlet Globemallow
Bearberry

Canadian bunchberry

Yellow Lady's Slipper

Yellow Salsify

Golden Currant
All wildflowers blooming in South Dakota in June
| # | Species | Scientific name | Family | Obs. | Peak in state |
|---|---|---|---|---|---|
| 1 | Sego Lily | Calochortus nuttallii | lily family | 77 | Jun (peak) |
| 2 | Field Bindweed | Convolvulus arvensis | bindweed family | 56 | Jun (peak) |
| 3 | Showy Milkweed | Asclepias speciosa | Dogbane Family | 49 | Jul (rising) |
| 4 | Wood Lily | Lilium philadelphicum | lily family | 34 | Jul (rising) |
| 5 | Dame's Rocket | Hesperis matronalis | mustard family | 31 | Jun (peak) |
| 6 | Red Columbine | Aquilegia canadensis | buttercup family | 28 | Jun (peak) |
| 7 | Scarlet Globemallow | Sphaeralcea coccinea | Mallow and Hibiscus Family | 26 | Jun (peak) |
| 8 | Bearberry | Arctostaphylos uva-ursi | heath family | 22 | May (past peak) |
| 9 | Canadian bunchberry | Cornus canadensis | Dogwood family | 17 | Jun (peak) |
| 10 | Yellow Lady's Slipper | Cypripedium parviflorum | Orchids | 17 | Jun (peak) |
| 11 | Yellow Salsify | Tragopogon dubius | Sunflowers, Daisies, Asters, and Allies | 14 | Jun (peak) |
| 12 | Golden Currant | Ribes aureum | Gooseberry Family | 13 | Jun (peak) |
| 13 | Red Osier Dogwood | Cornus sericea | Dogwood family | 12 | Jun (peak) |
| 14 | Small White Lady's-Slipper | Cypripedium candidum | Orchids | 12 | May (past peak) |
| 15 | Virginia strawberry | Fragaria virginiana | rose family | 11 | Jun (peak) |
| 16 | Fireweed | Chamaenerion angustifolium | evening primrose family | 10 | Jul (rising) |
| 17 | Musk Thistle | Carduus nutans | Sunflowers, Daisies, Asters, and Allies | 9 | Jun (peak) |
| 18 | Upright Prairie Coneflower | Ratibida columnifera | Sunflowers, Daisies, Asters, and Allies | 9 | Jul (rising) |
| 19 | Common Milkweed | Asclepias syriaca | Dogbane Family | 8 | Jun (peak) |
| 20 | Smooth Sumac | Rhus glabra | Cashew Family | 8 | Jun (peak) |
| 21 | Yellow Sweetclover | Melilotus officinalis | Legumes | 8 | Jul (rising) |
| 22 | Hoary Puccoon | Lithospermum canescens | borage family | 7 | May (past peak) |
| 23 | Common Yarrow | Achillea millefolium | Sunflowers, Daisies, Asters, and Allies | 7 | Jul (rising) |
| 24 | Spreading Dogbane | Apocynum androsaemifolium | Dogbane Family | 6 | Jul (rising) |
| 25 | Red Clover | Trifolium pratense | Legumes | 6 | Jul (rising) |
| 26 | Canada Violet | Viola canadensis | Violet Family | 6 | May (past peak) |
| 27 | Northern Bedstraw | Galium boreale | madder family | 6 | Jul (rising) |
| 28 | Richardson's geranium | Geranium richardsonii | Geranium family | 6 | Jul (rising) |
| 29 | Star-Flowered Lily-Of-The-Valley | Maianthemum stellatum | agave and allies | 5 | May (past peak) |
| 30 | Bittersweet Nightshade | Solanum dulcamara | nightshade family | 5 | Jun (peak) |
| 31 | Black Medick | Medicago lupulina | Legumes | 5 | Jun (peak) |
| 32 | Virginia waterleaf | Hydrophyllum virginianum | borage family | 5 | May (past peak) |
| 33 | Yellow Star Grass | Hypoxis hirsuta | Stargrasses and allies | 5 | Jun (peak) |
| 34 | Gunnison's Mariposa Lily | Calochortus gunnisonii | lily family | 5 | Jul (rising) |
| 35 | Wild Sarsaparilla | Aralia nudicaulis | ivy family | 5 | Jun (peak) |
| 36 | Prairie Phlox | Phlox pilosa | phlox family | 5 | Jun (peak) |
| 37 | Edible Valerian | Valeriana edulis | honeysuckle family | 5 | May (past peak) |
| 38 | Canada anemone | Anemonastrum canadense | buttercup family | 5 | Jun (peak) |
| 39 | Chokecherry | Prunus virginiana | rose family | 4 | May (past peak) |
| 40 | White Clover | Trifolium repens | Legumes | 4 | Jun (peak) |
| 41 | Prairie Smoke | Geum triflorum | rose family | 4 | May (past peak) |
| 42 | Red-Berried Elder | Sambucus racemosa | elder family | 4 | Jun (peak) |
| 43 | black-eyed Susan | Rudbeckia hirta | Sunflowers, Daisies, Asters, and Allies | 4 | Jul (rising) |
| 44 | Hoary Vervain | Verbena stricta | Verbena Family | 4 | Jul (rising) |
| 45 | Common Dandelion | Taraxacum officinale | Sunflowers, Daisies, Asters, and Allies | 3 | May (past peak) |
| 46 | Butterfly Milkweed | Asclepias tuberosa | Dogbane Family | 3 | Jul (rising) |
| 47 | Common Cowparsnip | Heracleum maximum | carrot family | 3 | Jul (rising) |
| 48 | Common Soapwort | Saponaria officinalis | pink family | 3 | Jun (peak) |
| 49 | Alfalfa | Medicago sativa | Legumes | 3 | Jul (rising) |
| 50 | Narrowleaf Puccoon | Lithospermum incisum | borage family | 3 | May (past peak) |