8 RANUNCULACEiE. (CROWFOOT FAMILY.) 



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

 lobes wcdgc-sliapcd, sharply toothed ; petals minute, shorter than the calyx ; 

 achenia in yloljosc iieads, pointed with a long and slender recurved beak. — Low 

 grounds. April and May. — Stem l°-2° high. 



B. R. sceleratus, L. Smooth; leaves 3-partcd, with the divisions wedge- 

 shaped, obtusely lobed and tootlied ; tlic U])perniost sessile ; petals as long as 

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

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

 thick, 1° high. 



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

 stalked, 3-])arted, the divisions lanceolate, acutely lobed and toothed ; petals 

 shorter than tiie 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, ^•ery hairy. 



*+ ■*->■ Petals much larger than the eahjx : -achenia in (jlohose heads. 



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

 into vcn.' numerous capillaiy segments, cmcrscd ones reniform, 3 - 5-parted, the 

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

 beak. — In still water, North Caiolina and northward. jNIay - July. — Stems 

 2° -4° long. 



11. R. repens, L. Smootli or Imiry; leaves ternatc, or the earliest ones 

 3-lobed ; leaflets 3-lobcd, tootlied ; 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. p. hispidus. Hirsute ; stem erect ; leaves ample ; peduncles long, 

 with the hairs appresscd. (R. hispidus, J/jr. R. Marilandicus and tomcntosus, 

 Poir: the latter a form with softer pubescence.) 



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

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



12. R. palmatus, Lll. Hirsute with appresscd hairs; leaves small (1' 

 wide), ternatc 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. buIboSUS, L. Hairy; stem erect (1°- 1A° high) from a bnlb-liko 

 base ; haves ternate ; leaflets 3-i)artcd, with toothed lobes ; those of the upper 

 leaves lanceolate, entire; flowci-s large (I'wide); achenia pointed with a short 

 recurved Ix'ak. — Low grounds in the upper districts. Introduced. May. 



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

 3-parted, the divisions deeply cut into three wcdge-siiaped or lanccoliite, acutely- 

 toothed lobes ; the uppermost 3-|>nrt('d, with linear entire lobes ; nclienia jioinfed 

 with a short recurved beak. — Low waste places, sjjaringly intro(lini'<l fiom 

 Europe. 



