Wildflowers Blooming in District of Columbia in September (60 Species)

60 wildflowers were recorded blooming in District of Columbia in September in our iNaturalist sample; 22 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 September

White Snakeroot40 obs.

Chicory33 obs.

Porcelain Berry29 obs.

Common Jewelweed27 obs.

Asiatic dayflower27 obs.

Autumn Clematis25 obs.

Wingstem19 obs.

Late Boneset16 obs.

Pickerelweed12 obs.

American hog-peanut12 obs.

Common Hibiscus9 obs.

Purple Passionflower8 obs.

All wildflowers blooming in District of Columbia in September

#	Species	Scientific name	Family	Obs.	Peak in state
1	White Snakeroot	Ageratina altissima	Sunflowers, Daisies, Asters, and Allies	40	Sep (peak)
2	Chicory	Cichorium intybus	Sunflowers, Daisies, Asters, and Allies	33	Jun (past peak)
3	Porcelain Berry	Ampelopsis glandulosa	Grape Family	29	Aug (past peak)
4	Common Jewelweed	Impatiens capensis	balsam family	27	Sep (peak)
5	Asiatic dayflower	Commelina communis	Spiderworts	27	Sep (peak)
6	Autumn Clematis	Clematis terniflora	buttercup family	25	Sep (peak)
7	Wingstem	Verbesina alternifolia	Sunflowers, Daisies, Asters, and Allies	19	Sep (peak)
8	Late Boneset	Eupatorium serotinum	Sunflowers, Daisies, Asters, and Allies	16	Sep (peak)
9	Pickerelweed	Pontederia cordata	Pickerelweeds	12	Jun (past peak)
10	American hog-peanut	Amphicarpaea bracteata	Legumes	12	Sep (peak)
11	Common Hibiscus	Hibiscus syriacus	Mallow and Hibiscus Family	9	Sep (peak)
12	Purple Passionflower	Passiflora incarnata	Passionfruit Family	8	Sep (peak)
13	Blue Mistflower	Conoclinium coelestinum	Sunflowers, Daisies, Asters, and Allies	8	Sep (peak)
14	Cardinal Flower	Lobelia cardinalis	bellflower family	6	Aug (past peak)
15	Carolina horsenettle	Solanum carolinense	nightshade family	6	Jun (past peak)
16	Asian mazus	Mazus pumilus	mazus family	6	Apr (past peak)
17	Purple Loosestrife	Lythrum salicaria	lythrum family	5	Jul (past peak)
18	Amur honeysuckle	Lonicera maackii	honeysuckle family	5	Apr (past peak)
19	Citronella Horse Balm	Collinsonia canadensis	Mint Family	5	Sep (peak)
20	Pale Jewelweed	Impatiens pallida	balsam family	4	Sep (peak)
21	Broadleaf Arrowhead	Sagittaria latifolia	Water-Plantain family	4	Sep (peak)
22	American pokeweed	Phytolacca americana	Pokeweed Family	4	Aug (past peak)
23	White Clover	Trifolium repens	Legumes	4	May (past peak)
24	Swamp Rose Mallow	Hibiscus moscheutos	Mallow and Hibiscus Family	4	Jul (past peak)
25	American groundnut	Apios americana	Legumes	4	Aug (past peak)
26	brown-eyed Susan	Rudbeckia triloba	Sunflowers, Daisies, Asters, and Allies	4	Jul (past peak)
27	Red Clover	Trifolium pratense	Legumes	3	May (past peak)
28	Common Morning-Glory	Ipomoea purpurea	bindweed family	3	Sep (peak)
29	False Daisy	Eclipta prostrata	Sunflowers, Daisies, Asters, and Allies	3	Sep (peak)
30	Common Sneezeweed	Helenium autumnale	Sunflowers, Daisies, Asters, and Allies	3	Sep (peak)
31	Cutleaf Coneflower	Rudbeckia laciniata	Sunflowers, Daisies, Asters, and Allies	3	Aug (past peak)
32	Leafy Elephant's-Foot	Elephantopus carolinianus	Sunflowers, Daisies, Asters, and Allies	3	Aug (past peak)
33	White Wood Aster	Eurybia divaricata	Sunflowers, Daisies, Asters, and Allies	3	Sep (peak)
34	American burnweed	Erechtites hieraciifolius	Sunflowers, Daisies, Asters, and Allies	3	Sep (peak)
35	Buttonweed	Diodia virginiana	madder family	3	Jul (past peak)
36	Low Smartweed	Persicaria longiseta	knotweed family	3	Nov (rising)
37	Mock Strawberry	Potentilla indica	rose family	3	Apr (past peak)
38	Yellow Sweetclover	Melilotus officinalis	Legumes	2	May (past peak)
39	Tall Goldenrod	Solidago altissima	Sunflowers, Daisies, Asters, and Allies	2	Sep (peak)
40	Climbing Hempvine	Mikania scandens	Sunflowers, Daisies, Asters, and Allies	2	Aug (past peak)
41	White Morning-glory	Ipomoea lacunosa	bindweed family	2	Sep (peak)
42	American jumpseed	Persicaria virginiana	knotweed family	2	Jul (past peak)
43	Trailing Fuzzy-Bean	Strophostyles helvola	Legumes	2	Sep (peak)
44	Japanese knotweed	Reynoutria japonica	knotweed family	2	Jun (past peak)
45	Common Dandelion	Taraxacum officinale	Sunflowers, Daisies, Asters, and Allies	1	Apr (past peak)
46	Butterfly Milkweed	Asclepias tuberosa	Dogbane Family	1	Jun (past peak)
47	Bull Thistle	Cirsium vulgare	Sunflowers, Daisies, Asters, and Allies	1	Jun (past peak)
48	Giant Ragweed	Ambrosia trifida	Sunflowers, Daisies, Asters, and Allies	1	Sep (peak)
49	Common Cat's-ear	Hypochaeris radicata	Sunflowers, Daisies, Asters, and Allies	1	Aug (past peak)
50	Bittersweet Nightshade	Solanum dulcamara	nightshade family	1	May (past peak)