RANUNCULACEAE. 



Vol. II. 



i6. Ranunculus abortivus I.. Kidney- or 

 Smooth-leaved Crowfoot. Fig. 1910. 



h'diiiinciilns aborlivus L. Sp. I'l. 551. 1753. 



R. abortivus cticyclus Feniald, Rhodora i : 52. 1899. 



Glabrou.s, or but sparingly pubescent, 6-2 

 bi,gh, branched. Basal leaves long-petiolcd, 

 bright green, thick, crenatc or sometimes lobed, 

 broadly ovate, obtuse, and generally cordate or 

 reniforni, the cauline sessile or nearly so, di- 

 vided into oblong or linear somewhat cuneate 

 lobes; head of fruit globose, the receptacle short, 

 pubescent ; flowers yellow, 2"-3" broad, the petals 

 oblong, shorter than the reflexed calyx ; achenes 

 tipped with a minute curved beak. 



17. Ranunculus micranthus Ntitt. 

 Crowfoot. Fig. 191 1. 



R. micranthus Nutt. ; T. & G. FI. N. A. i : 18. 1838. 

 Ranunculus abortivus var. micranthus A. Gray, Man. 

 Ed. 5, 42. 1867. 



Similar to the preceding species but usually 

 smaller, villous w^ith spreading hairs, flowering 

 when very young, 6'-i8' tall. Leaves thin, dull 

 green, the basal ones ovate, obovate, or subor- 

 bicular, 3-lobed or crenate, narrowed, rounded 

 or subcordate at the base ; segments of the upper 

 leaves narrow, entire or sharply toothed ; flowers 

 yellow, about 3" broad ; sepals narrowed into a 

 short claw; petals oblong or oval, 2-3 times as 

 long as wide; head of fruit rather longer than 

 thick, the receptacle linear, glabrous or very 

 nearly so. 



In rich woods, often on rocks, Maine to Minnesota, 

 Saskatchewan, Georgia, Arkansas and Colorado. In 

 New York it blooms somewhat earlier than the pre- 

 ceding species. Roots tuberous. April-May. 



In woods and moist grounds. Lalirador an. 

 Scotia to Manitoba, south to Florida, Arkan 

 Colorado. Recorded as biennial in duration, 

 June. 



Rock 



d Nova 



sas and 



April- 



18. Ranunculus alleghaniensis Britton. 

 jNIountain Crowfoot. Fig. 1912. 



Ranunculus alleghaniensis Britton, Bull. Torr. Club 

 22: 224. 1895. 



Similar in aspect to R. abortknis and R. mi- 

 cranthus, glabrous, stem widely branched, i 

 2 tall. Basal leaves reniform or suborbicular. 

 6"-2' wide, long-petioled, crenate or some of 

 them lobed, the teeth and lobes subacute ; stem 

 leaves sessile or the lower petioled, divided 

 nearly or quite to the base into linear acute en- 

 tire toothed or cleft segments; flowers 2"-3" 

 broad; petals oblong, not exceeding the calyx, 

 yellow, glandular ; head of fruit globose or glo- 

 bose-oblong, 2" in diameter ; achenes slightly 

 compressed and margined, tipped with subulate 

 hooked or recurved styles of about one-half their 

 length. 



In rich woods, Vermont, Massachusetts and New- 

 York to the mountains of North Carolina. Plant 

 slightly glaucous. April-May. 



