| 1 | Ranunculus | abortivus | Little-leaved Buttercup | Buttercup Family | Ranunculaceae | Magnoliopsida |
| 2 | Ranunculus | acris | Tall Buttercup | Buttercup Family | Ranunculaceae | Magnoliopsida |
| 3 | Ranunculus | allegheniensis | Allegheny Mountain Buttercup | Buttercup Family | Ranunculaceae | Magnoliopsida |
| 4 | Ranunculus | ambigens | Water-plaintain Spearwort | Buttercup Family | Ranunculaceae | Magnoliopsida |
| 5 | Ranunculus | bulbosus | Bulbous Buttercup | Buttercup Family | Ranunculaceae | Magnoliopsida |
| 6 | Ranunculus | caricetorum | Swamp Buttercup | Buttercup Family | Ranunculaceae | Magnoliopsida |
| 7 | Ranunculus | fascicularis | Early Buttercup | Buttercup Family | Ranunculaceae | Magnoliopsida |
| 8 | Ranunculus | flabellaris | Yellow Water Buttercup | Buttercup Family | Ranunculaceae | Magnoliopsida |
| 9 | Ranunculus | hederaceus | Ivy Buttercup | Buttercup Family | Ranunculaceae | Magnoliopsida |
| 10 | Ranunculus | hispidus | Bristly Buttercup | Buttercup Family | Ranunculaceae | Magnoliopsida |
| 11 | Ranunculus | hispidus var. hispidus | Bristly Buttercup (hispidus) | Buttercup Family | Ranunculaceae | Magnoliopsida |
| 12 | Ranunculus | hispidus var. nitidus | Hispid Buttercup (nitidus) | Buttercup Family | Ranunculaceae | Magnoliopsida |
| 13 | Ranunculus | laxicaulis | Mississippi Buttercup | Buttercup Family | Ranunculaceae | Magnoliopsida |
| 14 | Ranunculus | micranthus | Rock Buttercup | Buttercup Family | Ranunculaceae | Magnoliopsida |
| 15 | Ranunculus | parviflorus | Small-flowered Buttercup | Buttercup Family | Ranunculaceae | Magnoliopsida |
| 16 | Ranunculus | pensylvanicus | Pennsylvania Buttercup | Buttercup Family | Ranunculaceae | Magnoliopsida |
| 17 | Ranunculus | pusillus | Low Spearwort | Buttercup Family | Ranunculaceae | Magnoliopsida |
| 18 | Ranunculus | recurvatus | Hooked Buttercup | Buttercup Family | Ranunculaceae | Magnoliopsida |
| 19 | Ranunculus | repens | Creeping Buttercup | Buttercup Family | Ranunculaceae | Magnoliopsida |
| 20 | Ranunculus | sardous | Hairy Buttercup | Buttercup Family | Ranunculaceae | Magnoliopsida |
| 21 | Ranunculus | sceleratus var. sceleratus | Cursed Buttercup | Buttercup Family | Ranunculaceae | Magnoliopsida |