158 RANUNCULACEAE. 



Mount Adams and other high peaks of the Cascade Mountains, not definitely- 

 known from within our limits. 



Ranunculus hebecarpus H. & A. Annual ; whole plant hairy ; stems slender, 

 mostly erect, 15-30 cm. tall; leaves 2-3 cm. broad, 3-parted, the lobes incisely 

 3-lobed; petioles of the leaves much longer than the blades; petals small, 

 2 mm. long, about equalling the sepals; akenes flattened, with short hooked 

 beaks, the sides roughened and covered with hooked hairs. 



Eastern Washington to California. Introduced on Vancouver Island. 



Ranunculus muricatus L. Annual, nearly glabrous; stems stout, rather 

 succulent, 10-20 cm. high; basal leaves circular in outline, reniform, 3-lobed, 

 coarsely crenate-dentate ; cauline 3-cleft, broadly cuneate; petals bright yellow, 

 longer than the calyx; akenes flat, the sides armed with fine prickles, the beak 

 stout, subulate. 



Wet places, introduced from Europe. 



Ranunculus sceleratus L. Annual, glabrous; stems erect, hollow, 15-40 

 cm. high; leaves pale green, the basal ones reniform orbicular, deeply 3-lobed, 

 the cauline 3-S-lobed or parted and the divisions cleft or lobed; petals pale 

 yellow, scarcely longer than the calyx; akenes short-beaked, smooth, numerous, 

 in a cylindric head. 



Rare in moist places but undoubtedly native. 



Ranunculus suksdorfii Gray. Perennial, glabrous; leaves 1-2 cm. long, 

 truncate to somewhat reniform at base, deeply 3-5-parted; segments of the 

 basal leaves cuneate, 3-5-cleft, of the cauline linear and entire; petals sub- 

 orbicular, retuse, 8-12 mm. long, bright yellow; akenes in a globose cluster, 

 glabrous, each tipped with a long slender style. 



In moist places at about 2000 m. altitude, Cascade and Olympic Mountains. 



Ranunculus eschscholtzii Schlecht. Perennial, glabrous or nearly so, 

 10-20 cm. high; leaves ciliate, the basal orbicular, deeply 3-5-cleft or parted, 

 the cuneate divisions again lobed or cleft; cauline mostly 3-parted, the lobes 

 usually entire; flowers few; petals pale yellow, 6-10 mm. long, exceeding the 

 sepals; head of akenes oblong; akenes swollen, marginless, glabrous, tipped 

 with a straight beak. 



Along alpine rills at 1500-2000 m. altitude. First found at Unalaska by 

 Chamisso. 



Ranunculus verecundus Robinson. Perennial, nearly glabrous; seems sub- 

 erect or procumbent; basal leaves reniform to suborbicular, deeply cordate, 3- 

 parted, not ciliate, the segments 3-5-lobed or deeply crenate, the lobes obtuse; 

 petiole 2-4 cm. long, sparsely villose at the broadened base; cauline leaves 1-3, 

 3-5-parted into narrow segments; peduncles 3-7 cm. long; petals obovate, 

 bright-yellow, scarcely exceeding the sepals; akenes numerous in an ovoid to 

 cylindric cluster, glabrous, compressed, 1.8 mm. long; style recurved; receptacle 

 villous at tip. 



Mount Rainier, 2300 m. altitude, Flett; Mount Adams, 2000 m. altitude, 

 Suksdorf. 



Ranunculus occidentalis Nutt. Perennial, villous-hirsute; stems slender, 

 25-45 cm. high, not much branched; basal leaves orbicular, cordate, deeply 

 3-5-cleft or sometimes parted, the segments cuneate and 2-7-lobed, the lobes 

 acute; cauline leaves mostly parted into linear entire segments; petals bright 

 yellow, 10-12 mm. long, twice as long as the reflexed sepals; akenes glabrous 

 or sparingly bristly, flat, tipped with stout hooked beaks; cluster of akenes 

 globose; receptacle glabrous. 



Common in open prairies. 



