56 wildflowers were recorded blooming in Mississippi in September in our iNaturalist sample; 25 of the top 50 are at their peak this month. The list is ranked by number of research-grade observations.
Top wildflowers in September

Blue Mistflower
Cardinal Flower

Late Boneset

Climbing Hempvine

Downy Lobelia
Butterfly Pea

Partridge Pea

Bitterweed
Trailing Fuzzy-Bean

Frostweed

Perennial Wooly Bean

Pine lily
All wildflowers blooming in Mississippi in September
| # | Species | Scientific name | Family | Obs. | Peak in state |
|---|---|---|---|---|---|
| 1 | Blue Mistflower | Conoclinium coelestinum | Sunflowers, Daisies, Asters, and Allies | 225 | Oct (rising) |
| 2 | Cardinal Flower | Lobelia cardinalis | bellflower family | 140 | Sep (peak) |
| 3 | Late Boneset | Eupatorium serotinum | Sunflowers, Daisies, Asters, and Allies | 135 | Sep (peak) |
| 4 | Climbing Hempvine | Mikania scandens | Sunflowers, Daisies, Asters, and Allies | 99 | Sep (peak) |
| 5 | Downy Lobelia | Lobelia puberula | bellflower family | 73 | Sep (peak) |
| 6 | Butterfly Pea | Centrosema virginianum | Legumes | 70 | Jul (past peak) |
| 7 | Partridge Pea | Chamaecrista fasciculata | Legumes | 68 | Aug (past peak) |
| 8 | Bitterweed | Helenium amarum | Sunflowers, Daisies, Asters, and Allies | 60 | Aug (past peak) |
| 9 | Trailing Fuzzy-Bean | Strophostyles helvola | Legumes | 60 | Sep (peak) |
| 10 | Frostweed | Verbesina virginica | Sunflowers, Daisies, Asters, and Allies | 57 | Sep (peak) |
| 11 | Perennial Wooly Bean | Strophostyles umbellata | Legumes | 54 | Sep (peak) |
| 12 | Pine lily | Lilium catesbaei | lily family | 52 | Sep (peak) |
| 13 | Tievine | Ipomoea cordatotriloba | bindweed family | 49 | Sep (peak) |
| 14 | White Morning-glory | Ipomoea lacunosa | bindweed family | 47 | Sep (peak) |
| 15 | Pineland Hibiscus | Sabdariffa aculeata | Mallow and Hibiscus Family | 47 | Jul (past peak) |
| 16 | White beggarticks | Bidens alba | Sunflowers, Daisies, Asters, and Allies | 41 | Sep (peak) |
| 17 | Blue Curls | Trichostema dichotomum | Mint Family | 40 | Sep (peak) |
| 18 | Tall Goldenrod | Solidago altissima | Sunflowers, Daisies, Asters, and Allies | 38 | Oct (rising) |
| 19 | Buttonweed | Diodia virginiana | madder family | 34 | Jul (past peak) |
| 20 | Leafy Elephant's-Foot | Elephantopus carolinianus | Sunflowers, Daisies, Asters, and Allies | 33 | Sep (peak) |
| 21 | Field Thistle | Cirsium discolor | Sunflowers, Daisies, Asters, and Allies | 31 | Sep (peak) |
| 22 | American groundnut | Apios americana | Legumes | 30 | Aug (past peak) |
| 23 | St. Andrew's cross | Hypericum hypericoides | St. John's wort family | 30 | Jul (past peak) |
| 24 | Common Jewelweed | Impatiens capensis | balsam family | 29 | Sep (peak) |
| 25 | Flowering Spurge | Euphorbia corollata | Spurge Family | 29 | Aug (past peak) |
| 26 | American trumpet vine | Campsis radicans | bignonia family | 28 | Jun (past peak) |
| 27 | Purple Passionflower | Passiflora incarnata | Passionfruit Family | 27 | Jul (past peak) |
| 28 | Camphorweed | Heterotheca subaxillaris | Sunflowers, Daisies, Asters, and Allies | 27 | Sep (peak) |
| 29 | Common Evening-Primrose | Oenothera biennis | evening primrose family | 26 | Sep (peak) |
| 30 | Spotted Horsemint | Monarda punctata | Mint Family | 26 | Sep (peak) |
| 31 | Autumn Clematis | Clematis terniflora | buttercup family | 25 | Aug (past peak) |
| 32 | black-eyed Susan | Rudbeckia hirta | Sunflowers, Daisies, Asters, and Allies | 24 | Jun (past peak) |
| 33 | Sharpwing Monkeyflower | Mimulus alatus | lopseed family | 24 | Aug (past peak) |
| 34 | Common Sneezeweed | Helenium autumnale | Sunflowers, Daisies, Asters, and Allies | 23 | Oct (rising) |
| 35 | Common Boneset | Eupatorium perfoliatum | Sunflowers, Daisies, Asters, and Allies | 23 | Sep (peak) |
| 36 | Sweet Everlasting | Pseudognaphalium obtusifolium | Sunflowers, Daisies, Asters, and Allies | 23 | Sep (peak) |
| 37 | Wingstem | Verbesina alternifolia | Sunflowers, Daisies, Asters, and Allies | 22 | Sep (peak) |
| 38 | American burnweed | Erechtites hieraciifolius | Sunflowers, Daisies, Asters, and Allies | 20 | Jul (past peak) |
| 39 | Turk's cap | Malvaviscus arboreus | Mallow and Hibiscus Family | 17 | Sep (peak) |
| 40 | American jumpseed | Persicaria virginiana | knotweed family | 16 | Sep (peak) |
| 41 | Carolina horsenettle | Solanum carolinense | nightshade family | 15 | May (past peak) |
| 42 | Virgin's-Bower | Clematis virginiana | buttercup family | 15 | Aug (past peak) |
| 43 | Halberd-leaf Rosemallow | Hibiscus laevis | Mallow and Hibiscus Family | 14 | Jul (past peak) |
| 44 | American white waterlily | Nymphaea odorata | Waterlily Family | 13 | May (past peak) |
| 45 | False Daisy | Eclipta prostrata | Sunflowers, Daisies, Asters, and Allies | 13 | Aug (past peak) |
| 46 | American hog-peanut | Amphicarpaea bracteata | Legumes | 13 | Sep (peak) |
| 47 | Wild Potato Vine | Ipomoea pandurata | bindweed family | 13 | Jun (past peak) |
| 48 | Low Smartweed | Persicaria longiseta | knotweed family | 13 | Oct (rising) |
| 49 | Spotted spurge | Euphorbia maculata | Spurge Family | 12 | Aug (past peak) |
| 50 | Horseweed | Erigeron canadensis | Sunflowers, Daisies, Asters, and Allies | 12 | Sep (peak) |