60 wildflowers were recorded blooming in Louisiana in September in our iNaturalist sample; 16 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
Climbing Hempvine
Purple Passionflower
Pineland Hibiscus
Cardinal Flower
Late Boneset
White beggarticks
Butterfly Pea
American trumpet vine
American black elderberry
Buttonweed
Blue Curls
All wildflowers blooming in Louisiana in September
| # | Species | Scientific name | Family | Obs. | Peak in state |
|---|---|---|---|---|---|
| 1 | Blue Mistflower | Conoclinium coelestinum | Sunflowers, Daisies, Asters, and Allies | 59 | Oct (rising) |
| 2 | Climbing Hempvine | Mikania scandens | Sunflowers, Daisies, Asters, and Allies | 47 | Oct (rising) |
| 3 | Purple Passionflower | Passiflora incarnata | Passionfruit Family | 45 | Jul (past peak) |
| 4 | Pineland Hibiscus | Sabdariffa aculeata | Mallow and Hibiscus Family | 41 | Aug (past peak) |
| 5 | Cardinal Flower | Lobelia cardinalis | bellflower family | 27 | Sep (peak) |
| 6 | Late Boneset | Eupatorium serotinum | Sunflowers, Daisies, Asters, and Allies | 27 | Sep (peak) |
| 7 | White beggarticks | Bidens alba | Sunflowers, Daisies, Asters, and Allies | 21 | Oct (rising) |
| 8 | Butterfly Pea | Centrosema virginianum | Legumes | 20 | Aug (past peak) |
| 9 | American trumpet vine | Campsis radicans | bignonia family | 19 | Jul (past peak) |
| 10 | American black elderberry | Sambucus canadensis | elder family | 19 | May (past peak) |
| 11 | Buttonweed | Diodia virginiana | madder family | 16 | Sep (peak) |
| 12 | Blue Curls | Trichostema dichotomum | Mint Family | 15 | Sep (peak) |
| 13 | Tievine | Ipomoea cordatotriloba | bindweed family | 15 | Sep (peak) |
| 14 | Yellow Passionflower | Passiflora lutea | Passionfruit Family | 14 | Jul (past peak) |
| 15 | American groundnut | Apios americana | Legumes | 13 | Sep (peak) |
| 16 | Halberd-leaf Rosemallow | Hibiscus laevis | Mallow and Hibiscus Family | 10 | Aug (past peak) |
| 17 | Pickerelweed | Pontederia cordata | Pickerelweeds | 9 | Apr (past peak) |
| 18 | Whitemouth Dayflower | Commelina erecta | Spiderworts | 9 | Jul (past peak) |
| 19 | Saltmarsh mallow | Kosteletzkya pentacarpos | Mallow and Hibiscus Family | 8 | Oct (rising) |
| 20 | Buttonbush | Cephalanthus occidentalis | madder family | 7 | Jun (past peak) |
| 21 | Straggler Daisy | Calyptocarpus vialis | Sunflowers, Daisies, Asters, and Allies | 7 | Apr (past peak) |
| 22 | Sharpwing Monkeyflower | Mimulus alatus | lopseed family | 7 | Aug (past peak) |
| 23 | Trailing Fuzzy-Bean | Strophostyles helvola | Legumes | 7 | Sep (peak) |
| 24 | American white waterlily | Nymphaea odorata | Waterlily Family | 6 | Apr (past peak) |
| 25 | Asiatic dayflower | Commelina communis | Spiderworts | 6 | Sep (peak) |
| 26 | Bitterweed | Helenium amarum | Sunflowers, Daisies, Asters, and Allies | 6 | Aug (past peak) |
| 27 | Crowpoison | Nothoscordum bivalve | amaryllis, onions, and allies | 6 | Mar (past peak) |
| 28 | Perennial Wooly Bean | Strophostyles umbellata | Legumes | 6 | Sep (peak) |
| 29 | Sunshine Mimosa | Mimosa strigillosa | Legumes | 6 | May (past peak) |
| 30 | Carolina horsenettle | Solanum carolinense | nightshade family | 5 | May (past peak) |
| 31 | Giant Ragweed | Ambrosia trifida | Sunflowers, Daisies, Asters, and Allies | 5 | Sep (peak) |
| 32 | Green Antelopehorns | Asclepias viridis | Dogbane Family | 5 | Apr (past peak) |
| 33 | False Daisy | Eclipta prostrata | Sunflowers, Daisies, Asters, and Allies | 5 | Sep (peak) |
| 34 | Common Boneset | Eupatorium perfoliatum | Sunflowers, Daisies, Asters, and Allies | 5 | Sep (peak) |
| 35 | Aquatic Milkweed | Asclepias perennis | Dogbane Family | 5 | Apr (past peak) |
| 36 | Asian mazus | Mazus pumilus | mazus family | 5 | Apr (past peak) |
| 37 | Santa Maria feverfew | Parthenium hysterophorus | Sunflowers, Daisies, Asters, and Allies | 5 | Jul (past peak) |
| 38 | Shaggy Portulaca | Portulaca pilosa | purslane family | 5 | Jun (past peak) |
| 39 | Butterweed | Packera glabella | Sunflowers, Daisies, Asters, and Allies | 4 | Mar (past peak) |
| 40 | American hog-peanut | Amphicarpaea bracteata | Legumes | 4 | Sep (peak) |
| 41 | Turk's cap | Malvaviscus arboreus | Mallow and Hibiscus Family | 4 | May (past peak) |
| 42 | White Morning-glory | Ipomoea lacunosa | bindweed family | 4 | Sep (peak) |
| 43 | Pinkladies | Oenothera speciosa | evening primrose family | 3 | Apr (past peak) |
| 44 | Cross Vine | Bignonia capreolata | bignonia family | 3 | Mar (past peak) |
| 45 | Catchfly Prairie Gentian | Eustoma exaltatum | gentian family | 3 | Jun (past peak) |
| 46 | Japanese honeysuckle | Lonicera japonica | honeysuckle family | 3 | Apr (past peak) |
| 47 | Flowering Spurge | Euphorbia corollata | Spurge Family | 3 | Aug (past peak) |
| 48 | Obedient Plant | Physostegia virginiana | Mint Family | 3 | Sep (peak) |
| 49 | Leafy Elephant's-Foot | Elephantopus carolinianus | Sunflowers, Daisies, Asters, and Allies | 3 | Sep (peak) |
| 50 | Frostweed | Verbesina virginica | Sunflowers, Daisies, Asters, and Allies | 3 | Oct (rising) |