106 RANUNCULACEAE. 



Herbage glabrous or nearly so; low species. 

 Basal leaves 2^1-toothed or lobed, 

 rarely entire; cauline 3-cleft or 

 parted. R. glaberrimus 



Basal and cauline leaves all divided. 

 Annual; leaves 3-5-lobed or parted, 

 the lobes crenately incised or 

 cleft; akenes apiculate. R. sceleratus. 



Perennial; leaves roundish, 3-5- 



cleft into cuneate divisions. R. eschscholtzii 



Herbage pubescent or hirsute; mostly tall 



and coarse species. 

 Beaks of akenes hooked at the tip. 



Akenes hispid on the faces. R. bongardi. 



Akenes smooth. R. bongardi douglasii. 



Beaks of akenes not hooked at the tip. 



Akene-beak long. R. platyphyllus. 



Akene-beak short. 



Head of akenes oblong; petals 



not longer than sepals. R. pennsylvanicus. 



Head of akenes globose; petals 



longer than sepals. R. macounii. 



Ranunculus delphinifolius Torr. Aquatic or in drying ponds subaquatic 

 or terrestrial; immersed leaves ternately dissected into very narrow lobes; 

 emersed leaves roundish, S-7-parted into cuneate lobes; peduncles stout; 

 petals 5-8, bright yellow, 8-12 mm. long; akenes ovate, turgid, margined 

 towards the base with a thick corky border, and tipped with a straight beak. 

 Terrestrial forms have more or less pubescent leaves with the leaves parted into 

 cuneate lobes, and smaller flowers. In ponds and slow streams, infrequent. 



Ranunculus purshii Richards. Aquatic and glabrous or more commonly 

 terrestrial on muddy banks, and then pubescent; leaves orbicular, palmately 

 3-cleft, the segments 2-5-lobed; petals yellow, 4-5 mm. long, scarcely longer 

 than the sepals; akenes without distinct border, tipped with a short straight 

 beak. Spokane County. 



Ranunculus cymbalaria Pursh. Perennial, glabrous; leaves clustered at 

 the base and at the joints of the long slender stolons, ovate or ovate-cordate, 

 coarsely crenate, thick; scapes 1-7-flowered, 3-15 cm. high; petals 5-8, pale 

 yellow, 2-7 mm. long, exceeding the sepals; heads of akenes oblong, 6-12 mm. 

 long. Moist soil especially where saline. 



Ranunculus flammula unalaschensis (Bess.) Ledeb. Stems slender, 

 creeping, rooting at the joints, 15-30 cm. long; leaves narrowly-lanceolate, 

 short-petioled, acute at each end, 2-5 cm. long, shorter than the internodes; 

 flowers small, yellow, mostly solitary on the ascending tips of the stems; 

 akene small, smooth, short-beaked. Gravelly borders of small streams, 

 infrequent. 



Ranunculus alismaefolius Geyer. Glabrous throughout, rather stout, 

 40-60 cm. tall, branched above; radical leaves long-petioled, lanceolate or 

 ovate, obtuse, usually cuneate at the base, entire or obscurely denticulate, 

 5-10 cm. long; cauline leaves narrower, mostly sessile; peduncles elongated; 

 sepals small; petals yellow, cuneate-obovate, strongly- nerved, 8 mm. long; 

 akenes turgid, smooth, short-beaked. Borders of ponds, common. 



Ranunculus populago Greene. Flaccid and glabrous, 15-25 cm. high; 

 stems solitary or sometimes two or three from a fascicle of fibrous roots, erect, 

 leafy; basal leaves thin-membranaceous, round-reniform to cordate-ovate, 



