Wildflowers Blooming in Oklahoma in August (60 Species)

60 wildflowers were recorded blooming in Oklahoma in August in our iNaturalist sample; 10 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 August

Buttonbush96 obs.

Common Sunflower80 obs.

Cowpen Daisy72 obs.

Purple Passionflower70 obs.

Cardinal Flower66 obs.

Green Antelopehorns46 obs.

Whitemouth Dayflower39 obs.

Flowering Spurge35 obs.

Purple Coneflower28 obs.

Swamp Milkweed27 obs.

Asiatic dayflower24 obs.

Butterfly Milkweed22 obs.

All wildflowers blooming in Oklahoma in August

#	Species	Scientific name	Family	Obs.	Peak in state
1	Buttonbush	Cephalanthus occidentalis	madder family	96	Jul (past peak)
2	Common Sunflower	Helianthus annuus	Sunflowers, Daisies, Asters, and Allies	80	Sep (rising)
3	Cowpen Daisy	Verbesina encelioides	Sunflowers, Daisies, Asters, and Allies	72	Oct (rising)
4	Purple Passionflower	Passiflora incarnata	Passionfruit Family	70	Jul (past peak)
5	Cardinal Flower	Lobelia cardinalis	bellflower family	66	Sep (rising)
6	Green Antelopehorns	Asclepias viridis	Dogbane Family	46	May (past peak)
7	Whitemouth Dayflower	Commelina erecta	Spiderworts	39	Jun (past peak)
8	Flowering Spurge	Euphorbia corollata	Spurge Family	35	Sep (rising)
9	Purple Coneflower	Echinacea purpurea	Sunflowers, Daisies, Asters, and Allies	28	Jun (past peak)
10	Swamp Milkweed	Asclepias incarnata	Dogbane Family	27	Aug (peak)
11	Asiatic dayflower	Commelina communis	Spiderworts	24	Sep (rising)
12	Butterfly Milkweed	Asclepias tuberosa	Dogbane Family	22	Jun (past peak)
13	American trumpet vine	Campsis radicans	bignonia family	22	Aug (peak)
14	Bitterweed	Helenium amarum	Sunflowers, Daisies, Asters, and Allies	13	Oct (rising)
15	Partridge Pea	Chamaecrista fasciculata	Legumes	12	Aug (peak)
16	Lanceleaf Frogfruit	Phyla lanceolata	Verbena Family	11	Jul (past peak)
17	Firewheel	Gaillardia pulchella	Sunflowers, Daisies, Asters, and Allies	9	May (past peak)
18	Winecup Mallow	Callirhoe involucrata	Mallow and Hibiscus Family	9	May (past peak)
19	Trailing Fuzzy-Bean	Strophostyles helvola	Legumes	9	Aug (peak)
20	Hairy Ruellia	Ruellia humilis	Acanthus Family	8	Jul (past peak)
21	Shaggy Portulaca	Portulaca pilosa	purslane family	8	Aug (peak)
22	Purple Groundcherry	Quincula lobata	nightshade family	7	May (past peak)
23	Buffalo-Bur	Solanum rostratum	nightshade family	7	Aug (peak)
24	black-eyed Susan	Rudbeckia hirta	Sunflowers, Daisies, Asters, and Allies	7	Jun (past peak)
25	American germander	Teucrium canadense	Mint Family	7	Jun (past peak)
26	Silverleaf Nightshade	Solanum elaeagnifolium	nightshade family	7	Jun (past peak)
27	Leafy Elephant's-Foot	Elephantopus carolinianus	Sunflowers, Daisies, Asters, and Allies	7	Aug (peak)
28	Late Boneset	Eupatorium serotinum	Sunflowers, Daisies, Asters, and Allies	6	Sep (rising)
29	Field Bindweed	Convolvulus arvensis	bindweed family	6	May (past peak)
30	Plains Coreopsis	Coreopsis tinctoria	Sunflowers, Daisies, Asters, and Allies	6	Jun (past peak)
31	American pokeweed	Phytolacca americana	Pokeweed Family	5	May (past peak)
32	Yellow Passionflower	Passiflora lutea	Passionfruit Family	5	Jul (past peak)
33	Carolina horsenettle	Solanum carolinense	nightshade family	5	May (past peak)
34	Turkey Tangle Frogfruit	Phyla nodiflora	Verbena Family	5	Jun (past peak)
35	American lotus	Nelumbo lutea	lotus family	5	Jun (past peak)
36	Giant Ragweed	Ambrosia trifida	Sunflowers, Daisies, Asters, and Allies	4	Sep (rising)
37	American hog-peanut	Amphicarpaea bracteata	Legumes	4	Sep (rising)
38	Wingstem	Verbesina alternifolia	Sunflowers, Daisies, Asters, and Allies	4	Sep (rising)
39	Wild Potato Vine	Ipomoea pandurata	bindweed family	4	Jun (past peak)
40	Whorled Milkweed	Asclepias verticillata	Dogbane Family	4	Jun (past peak)
41	Sharpwing Monkeyflower	Mimulus alatus	lopseed family	4	Sep (rising)
42	White Morning-glory	Ipomoea lacunosa	bindweed family	4	Sep (rising)
43	Halberd-leaf Rosemallow	Hibiscus laevis	Mallow and Hibiscus Family	4	Aug (peak)
44	American water-willow	Justicia americana	Acanthus Family	3	Jun (past peak)
45	Common Morning-Glory	Ipomoea purpurea	bindweed family	3	Aug (peak)
46	Common Purslane	Portulaca oleracea	purslane family	3	Jul (past peak)
47	Marsh Fleabane	Pluchea odorata	Sunflowers, Daisies, Asters, and Allies	3	Aug (peak)
48	Autumn Clematis	Clematis terniflora	buttercup family	3	Sep (rising)
49	Hoary Vervain	Verbena stricta	Verbena Family	3	Jul (past peak)
50	Musk Thistle	Carduus nutans	Sunflowers, Daisies, Asters, and Allies	3	May (past peak)