8 RANUNCULACE^E. (CROWFOOT FAMILY.) 



7. K. recurvatus, Poir. Hirsute ; leaves all pctioled, 3 - 5-lobed ; the 

 lobes wedge-shaped, sharply toothed ; petals minute, shorter than the calyx ; 

 achenia in globose heads, pointed with a long and slender recurved beak. Low 

 grounds. April and May. Stem 1 - 2 high. 



8. R. sceleratus, L. Smooth; leaves 3-parted, with the divisions wedge- 

 shaped, obtusely lobed and toothed ; the uppermost sessile ; petals as long as 

 the calyx ; achenia in oblong or cylindrical heads, pointless. Ditches and 

 swamps, Charleston (Elliott). Introduced from Europe. April and May. Stems 

 thick, 1 high. 



9. R. Pennsylvanicus, L. Hirsute ; leaves ternate ; leaflets long- 

 stalked, 3-parted, the divisions lanceolate, acutely lobed and toothed ; petals 

 shorter than the calyx ; achenia in oblong heads, pointed with a broad straight 

 beak. Low grounds in the upper districts. June. Stem 2 - 3 high. Pe- 

 tioles elongated, very hairy. 



M- Petals much larger than the calyx : achenia in globose heads. 



10. R. Purshii, Richardson. Stem floating ; immersed leaves divided 

 into very numerous capillary segments, emersed ones renifonn, 3 - 5-parted, the 

 lobes variously divided ; sepals reflcxcd ; achenia pointed with a short straight 

 beak. In still water, North Carolina and northward. May - July. Stems 

 2 -4 long. 



11. R. repens, L. Smooth or hairy ; leaves ternate, or the earliest ones 

 3-lobed ; leaflets 3-lobed, toothed ; achenia strongly margined, pointed with the 

 broad and straight or slightly-curved beak ; stems erect or prostrate, often bear- 

 ing long runners. Rich soil, chiefly in the upper districts. Var. y in the river 

 swamps of the low country. March and April. 



Var. /?. hispidus. Hirsute ; stem erect ; leaves ample ; peduncles long, 

 with the hairs appressed. (R. hispidus, MX. R. Marilandicus and tomentosus, 

 Poir : the latter a form with softer pubescence. ) 



Var. y. nitidus. Smooth or nearly so; stem prostrate (l-2long); 

 leaves and flowers smaller. (R. nitidus, MM.) 



12. R. palmatUS, Ell. Hirsute with appressed hairs; leaves small (!' 

 wide), ternate or 3-parted, with the divisions ovate, sparingly toothed, those of the 

 upper leaves lanceolate and entire ; achenia strongly margined, straight-beaked. 

 (R. Carolinianus, DC.) Swamps in the pine barrens, Middle Florida to South 

 Carolina, rare. April and May. Stems 1 high. 



13. R. bulbOBUS, L. Hairy ; stem erect (1- l high) from a bulb-like 

 base ; leaves ternate ; leaflets 3-parted, with toothed lobes ; those of the upper 

 leaves lanceolate, entire ; flowers large (!' wide) ; achenia pointed with a short 

 recurved beak. Low grounds in the upper districts. Introduced. May. 



14. R. acris, L. Hairy; stem tall (2 -3), branched above; leaves 

 3-paited, the divisions deeply cut into three wedge-shaped or lanceolate, acutely- 

 toothed lobes ; the uppermost 3-parted, with linear entire lobes ; achenia pointed 

 with a short recurved beak. Low waste places, sparingly introduced from. 

 Europe. 



