55 wildflowers were recorded blooming in Florida in May 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 May

Purple Passionflower
Elliott's milkpea

Slimleaf Pawpaw

American beautyberry

Pale Grasspink

Whitemouth Dayflower

Tuberous Grasspink

American black elderberry

White beggarticks

Spurge Nettle

Chinese Crown Orchid

Eastern Coral Bean
All wildflowers blooming in Florida in May
| # | Species | Scientific name | Family | Obs. | Peak in state |
|---|---|---|---|---|---|
| 1 | Purple Passionflower | Passiflora incarnata | Passionfruit Family | 505 | May (peak) |
| 2 | Elliott's milkpea | Galactia elliottii | Legumes | 462 | May (peak) |
| 3 | Slimleaf Pawpaw | Asimina angustifolia | custard-apples | 366 | May (peak) |
| 4 | American beautyberry | Callicarpa americana | Mint Family | 296 | Jun (rising) |
| 5 | Pale Grasspink | Calopogon pallidus | Orchids | 285 | Apr (past peak) |
| 6 | Whitemouth Dayflower | Commelina erecta | Spiderworts | 234 | May (peak) |
| 7 | Tuberous Grasspink | Calopogon tuberosus | Orchids | 225 | May (peak) |
| 8 | American black elderberry | Sambucus canadensis | elder family | 201 | Apr (past peak) |
| 9 | White beggarticks | Bidens alba | Sunflowers, Daisies, Asters, and Allies | 179 | Jan (past peak) |
| 10 | Spurge Nettle | Cnidoscolus stimulosus | Spurge Family | 175 | Apr (past peak) |
| 11 | Chinese Crown Orchid | Eulophia graminea | Orchids | 139 | Apr (past peak) |
| 12 | Eastern Coral Bean | Erythrina herbacea | Legumes | 138 | Apr (past peak) |
| 13 | Butterfly Milkweed | Asclepias tuberosa | Dogbane Family | 127 | May (peak) |
| 14 | Buttonbush | Cephalanthus occidentalis | madder family | 120 | May (peak) |
| 15 | Turkey Tangle Frogfruit | Phyla nodiflora | Verbena Family | 113 | Apr (past peak) |
| 16 | Alamo vine | Distimake dissectus | bindweed family | 113 | May (peak) |
| 17 | American lotus | Nelumbo lutea | lotus family | 111 | May (peak) |
| 18 | Chinese Tallow | Triadica sebifera | Spurge Family | 103 | May (peak) |
| 19 | Pickerelweed | Pontederia cordata | Pickerelweeds | 93 | Apr (past peak) |
| 20 | Manyflower Marshpennywort | Hydrocotyle umbellata | ivy family | 90 | Mar (past peak) |
| 21 | Butterfly Pea | Centrosema virginianum | Legumes | 85 | Aug (rising) |
| 22 | Largeleaf Pennywort | Hydrocotyle bonariensis | ivy family | 84 | May (peak) |
| 23 | Orange Milkwort | Senega lutea | milkworts | 82 | Mar (past peak) |
| 24 | Carolina ruellia | Ruellia caroliniensis | Acanthus Family | 79 | Apr (past peak) |
| 25 | Shaggy Portulaca | Portulaca pilosa | purslane family | 65 | Jun (rising) |
| 26 | Sea Ox-Eye | Borrichia frutescens | Sunflowers, Daisies, Asters, and Allies | 60 | May (peak) |
| 27 | Lizard's Tail | Saururus cernuus | lizard's tail family | 58 | Apr (past peak) |
| 28 | Helmet skullcap | Scutellaria integrifolia | Mint Family | 56 | Apr (past peak) |
| 29 | Florida Hedgenettle | Stachys floridana | Mint Family | 55 | Apr (past peak) |
| 30 | Firewheel | Gaillardia pulchella | Sunflowers, Daisies, Asters, and Allies | 49 | Apr (past peak) |
| 31 | American groundnut | Apios americana | Legumes | 49 | May (peak) |
| 32 | Madagascar Periwinkle | Catharanthus roseus | Dogbane Family | 46 | Oct (rising) |
| 33 | Swamp Rose | Rosa palustris | rose family | 44 | Apr (past peak) |
| 34 | Persian silk tree | Albizia julibrissin | Legumes | 42 | May (peak) |
| 35 | American white waterlily | Nymphaea odorata | Waterlily Family | 42 | Apr (past peak) |
| 36 | Catchfly Prairie Gentian | Eustoma exaltatum | gentian family | 41 | Jun (rising) |
| 37 | Sunshine Mimosa | Mimosa strigillosa | Legumes | 40 | May (peak) |
| 38 | American trumpet vine | Campsis radicans | bignonia family | 39 | Jun (rising) |
| 39 | Netted Pawpaw | Asimina reticulata | custard-apples | 38 | Mar (past peak) |
| 40 | Pineland Hibiscus | Sabdariffa aculeata | Mallow and Hibiscus Family | 38 | Jul (rising) |
| 41 | Common Purslane | Portulaca oleracea | purslane family | 37 | Apr (past peak) |
| 42 | black-eyed Susan | Rudbeckia hirta | Sunflowers, Daisies, Asters, and Allies | 36 | May (peak) |
| 43 | American germander | Teucrium canadense | Mint Family | 35 | Jun (rising) |
| 44 | Bristle Thistle | Cirsium horridulum | Sunflowers, Daisies, Asters, and Allies | 34 | Mar (past peak) |
| 45 | Saltmarsh mallow | Kosteletzkya pentacarpos | Mallow and Hibiscus Family | 33 | Jul (rising) |
| 46 | Coral Honeysuckle | Lonicera sempervirens | honeysuckle family | 32 | Apr (past peak) |
| 47 | Aquatic Milkweed | Asclepias perennis | Dogbane Family | 32 | Aug (rising) |
| 48 | Lyreleaf Sage | Salvia lyrata | Mint Family | 31 | Mar (past peak) |
| 49 | Rose Pogonia | Pogonia ophioglossoides | Orchids | 28 | Apr (past peak) |
| 50 | Partridge Pea | Chamaecrista fasciculata | Legumes | 28 | Aug (rising) |