RANUNCULACE.^. (CROWFOOT FAMILY.) 7 



5. R. pusillus, Poir. Stems several, erect, 6' -12' high; lowest leaves 

 oyate or rounded ; flowers 2" wide, the 1-5 petals as long as the calyx ; 

 achenia obovate, miuutely pointed. — Miry banks in the upper districts. 

 April -May. — Leaves 1' long. — Stamens 5-9. 



6. E.. oblongifolius, Ell. Stem l°-2° high; lower leaves oblong; 

 flowers .3" -3" wide; petals longer than the calyx; stamens numerous; 

 achenia globular, pointless. — Ditches and wet places iu tlie lower districts. 

 May -July. Rare. 



^— -1— Lp.aves (exceptincj No. 7) ternateli/ lobed or divided, the lowest petioled. 

 •H- Petals small, not exceeding the cahjx. 



7. R. abortivus, L. Biennial, glabrous, 1*^-1 j° high; lowest leaves 

 broadlv cordate, crenate, rarely 3-pai-ted ; stem leaves 3-5-parted, the lance- 

 olate lobes toothed or entire ; achenia iu globose heads, very short-pointed. — 

 Low grounds. April - May. 



8. R. sceleratus, L. Annual, glabrous, \°-\\° high; lower leaves 

 round-cordate, 3-lobed, obtusely toothed, the upper 3-parted ; achenia in an 

 oblong or cylindrical head, pointless. — Ditches, etc., Charleston {Elliott). 

 Introduced. April -May. 



9. R. recurvatus, Poir. Hirsute, I°- 2° high; leaves all petioled, cor- 

 date, 3-5-lobed or parted, the broad divisions mucronate-toothed or serrate; 

 achenia iu a globose head, pointed with a lung and slender recurved beak. — 

 Low grounds. June -July. 



10. R. Pennsylvanicus, L. Hirsute, 1°- 2° high; leaves ternate, the 

 leaflets stalked, 3-parted, narrowly lobed and toothed ; achenia in an oblong 

 head, pointed with a broad straight beak. — Damp grounds, N. Carolina 

 ( Curtis ) . May - June. 



++ ++ Petals much larger than thecali/.r; achenia in a globose head, compressed, 

 the margins thickened. 



11. R. raultifidus, Pursh. Stem long, floating ; immersed leaves as in 

 No. 1, the floating ones palmately much divided ; achenia pointed with a short 

 straight beak. — In shallow ponds, N. Carolina {Curtis). 



12. R. septentrionalis, Poir. Stem erect or spreading, 1° high, hir- 

 sute ; leaves ternate or 3-parted, the divisions mostly stalked, 3-lobed ; achenia 

 broadly straight-beaked. (R. repens, 1st edition.) — Low or wet ground, in 

 the upper districts. April- May. — Stem sometimes stoloniferous. 



Var. Marilandieus. Densely hirsute with spreading hairs ; leaves 

 mostly ternate, the leaflets ovate or cuueate, 3-lobed. — Dry shaded soil in 

 the middle and upper districts. 



Var. nitidus. Smooth, prostrate, l°-2° long; leaves trifoliolate ; beak 

 of the achenium .slightly curved. — River swamps iu the lower districts. 

 Early spring. 



13. R. fascicularis, Muhl. Silky pubescent ; stem ^°-l° high from a 

 cluster of fleshy fibres ; leaves ternately or somewhat pinnately divided ; flow- 

 ers large ; achenia long-beaked. — Rocky woods, N. Carolina and Tennessee. 

 March -April. 



