Davis: RANUNCULI OF NORTH AMERICA. 493 



mately 3~5-parted, parts cut-toothed, upper ones sessile and 

 with oblong to linear-lanceolate lobes : flowers white, several on 

 a stem; sepals flat, pubescent; petals oblong, cuneate to orbic- 

 ular. May to June. Mountains of middle Europe. Var.Jlore- 

 pleno HORT., called White Bachelor's Button, and Fair Maids 

 of France, has very ornamental, double, white, globose flowers. 

 Garden 45, p. 29 and 48, p. 506. Var. luteus-plcno HORT., 

 flowers much doubled but of a golden yellow color. The type 

 and varieties are used in borders and half wild places. 



74. R. Pallasii SCHLECHT. Animad. Ranunc. i: 15. t. 2. 

 . 1819. 



Plant creeping, glabrous : stems and petioles large, hollow ; 

 ascending part of stem naked or i-leaved : leaf-blades short, 

 linear to oblong, rather obtuse, entire or sometimes 2-3-lobed : 

 petals 8 to u, oblong to obovate, white, 4 to 6 lines long; 

 sepals 3 to 4, shorter, greenish, broad : akenesthin-crustaceous, 

 2 lines long ; beak short. In shallow water. Arctic Alaska, 

 St. Lawrence islands, etc., across to northern Asia, and Lapland. 



75. R. amplexicaulis LINN. Sp. PL 549. 1753. 



Stems erect, 5 to 10 inches high, with two or three flowering 

 branches, glabrous : leaves entire, ovate to lanceolate, amplex- 

 icaul, acuminate, glabrous or at first with hairy edges soon be- 

 coming glabrous, glaucous : flowers 3 to 6, either terminal or 

 axillary, pure white with yellow stamens ; sepals pointed ; 

 petals much larger, obtuse. Mountains of southeastern Europe. 

 The plant is well suited to garden use and does not intrude 

 upon other plants. It does not do well in the dryest places. 

 The cut flowers preserve their freshness well. Bot. Mag. 266 

 (poor). Bot. Cab. 1593. Journ. Hort. Ill, 35, p. 345. Gard. 

 Chron. 1883, 19: 788. 



76. R. Lambertianus D. DIETR. Syn. PI. 3: 316. 1843. 



Plant swimming : leaves lanceolate, entire or subdenticulate, 

 their long petioles sheathing the stem at their base : flowers 

 small, yellow, axillary or terminal ; petals obtuse, longer than 

 the stamens and sepals. Wet places. Mexico. R. natans 

 NEES, ex G. Don, Gen. Syst. i: 31, 1831 (not C. A. 

 Meyer), is probably a form of this with leaves sometimes bifid. 

 Mexico. 



