Wildflowers Blooming in Oklahoma in May (60 Species)

60 wildflowers were recorded blooming in Oklahoma in May in our iNaturalist sample; 28 of the top 50 are at their peak this month. The list is ranked by number of research-grade observations.

Feb Mar Apr May Jun Jul Aug Sep Oct

Top wildflowers in May

Green Antelopehorns845 obs.

Tall Blue Wild Indigo207 obs.

Antelopehorn Milkweed180 obs.

Butterfly Milkweed148 obs.

Chinese privet111 obs.

Roughleaf Dogwood96 obs.

Purple Groundcherry69 obs.

Winecup Mallow59 obs.

Cowpen Daisy47 obs.

Showy Milkweed42 obs.

Firewheel41 obs.

Field Bindweed40 obs.

All wildflowers blooming in Oklahoma in May

#	Species	Scientific name	Family	Obs.	Peak in state
1	Green Antelopehorns	Asclepias viridis	Dogbane Family	845	May (peak)
2	Tall Blue Wild Indigo	Baptisia australis	Legumes	207	May (peak)
3	Antelopehorn Milkweed	Asclepias asperula	Dogbane Family	180	May (peak)
4	Butterfly Milkweed	Asclepias tuberosa	Dogbane Family	148	Jun (rising)
5	Chinese privet	Ligustrum sinense	olive family	111	May (peak)
6	Roughleaf Dogwood	Cornus drummondii	Dogwood family	96	May (peak)
7	Purple Groundcherry	Quincula lobata	nightshade family	69	May (peak)
8	Winecup Mallow	Callirhoe involucrata	Mallow and Hibiscus Family	59	May (peak)
9	Cowpen Daisy	Verbesina encelioides	Sunflowers, Daisies, Asters, and Allies	47	Oct (rising)
10	Showy Milkweed	Asclepias speciosa	Dogbane Family	42	Jun (rising)
11	Firewheel	Gaillardia pulchella	Sunflowers, Daisies, Asters, and Allies	41	May (peak)
12	Field Bindweed	Convolvulus arvensis	bindweed family	40	May (peak)
13	Poison Hemlock	Conium maculatum	carrot family	39	May (peak)
14	Common Yarrow	Achillea millefolium	Sunflowers, Daisies, Asters, and Allies	38	May (peak)
15	Japanese honeysuckle	Lonicera japonica	honeysuckle family	35	May (peak)
16	Smooth Sumac	Rhus glabra	Cashew Family	34	May (peak)
17	Pinkladies	Oenothera speciosa	evening primrose family	31	Apr (past peak)
18	Whitemouth Dayflower	Commelina erecta	Spiderworts	31	Jun (rising)
19	Musk Thistle	Carduus nutans	Sunflowers, Daisies, Asters, and Allies	30	May (peak)
20	American persimmon	Diospyros virginiana	persimmon family	29	May (peak)
21	White Clover	Trifolium repens	Legumes	28	Apr (past peak)
22	black-eyed Susan	Rudbeckia hirta	Sunflowers, Daisies, Asters, and Allies	27	Jun (rising)
23	Asiatic dayflower	Commelina communis	Spiderworts	23	Sep (rising)
24	Texas Paintbrush	Castilleja indivisa	broomrape family	22	Apr (past peak)
25	Carolina horsenettle	Solanum carolinense	nightshade family	21	May (peak)
26	Upright Prairie Coneflower	Ratibida columnifera	Sunflowers, Daisies, Asters, and Allies	17	Jun (rising)
27	Purple Passionflower	Passiflora incarnata	Passionfruit Family	14	Jul (rising)
28	Red Columbine	Aquilegia canadensis	buttercup family	13	Apr (past peak)
29	Field madder	Sherardia arvensis	madder family	12	Apr (past peak)
30	Deptford pink	Dianthus armeria	pink family	12	May (peak)
31	Hairy Vetch	Vicia villosa	Legumes	11	May (peak)
32	Plains Coreopsis	Coreopsis tinctoria	Sunflowers, Daisies, Asters, and Allies	11	Jun (rising)
33	Cutleaf Evening Primrose	Oenothera laciniata	evening primrose family	11	May (peak)
34	Clasping Coneflower	Rudbeckia amplexicaulis	Sunflowers, Daisies, Asters, and Allies	11	Jun (rising)
35	Yellow Sweetclover	Melilotus officinalis	Legumes	10	May (peak)
36	Hop Trefoil	Trifolium campestre	Legumes	10	Apr (past peak)
37	Wild Carrot	Daucus carota	carrot family	10	May (peak)
38	Ohio spiderwort	Tradescantia ohiensis	Spiderworts	10	May (peak)
39	Venus's looking-glass	Triodanis biflora	bellflower family	10	May (peak)
40	American water-willow	Justicia americana	Acanthus Family	9	Jun (rising)
41	Daisy Fleabane	Erigeron strigosus	Sunflowers, Daisies, Asters, and Allies	9	May (peak)
42	American black elderberry	Sambucus canadensis	elder family	9	Jun (rising)
43	Silverleaf Nightshade	Solanum elaeagnifolium	nightshade family	8	Jun (rising)
44	Coral Honeysuckle	Lonicera sempervirens	honeysuckle family	8	Apr (past peak)
45	Four-Leaved Milkweed	Asclepias quadrifolia	Dogbane Family	8	Apr (past peak)
46	Redstem Stork's-bill	Erodium cicutarium	Geranium family	7	Apr (past peak)
47	American pokeweed	Phytolacca americana	Pokeweed Family	7	May (peak)
48	Common Hoptree	Ptelea trifoliata	citrus family	7	May (peak)
49	Common Selfheal	Prunella vulgaris	Mint Family	7	May (peak)
50	Eastern Poison Ivy	Toxicodendron radicans	Cashew Family	7	May (peak)