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. MaytoJune. Mountains of middle Europe. Var. flore- 
pleno Horrt., 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. /uteus-pleno Horr., 
flowers much doubled but of a golden yellow color. The type 
and varieties are used in borders and half wild places. 
om. Pallasiy ScurecutT. Antmad. Ranunc: ©: 15. 7. 2: 
1819. 
Plant creeping, glabrous: stems and petioles large, hollow; 
ascending part of stem naked or 1-leaved: leaf-blades short, 
linear to oblong, rather obtuse, entire or sometimes 2—3-lobed : 
petals 8 to 11, oblong to obovate, white, 4 to 6 lines long; 
sepals 3 to 4, shorter, greenish, broad: akenes thin-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. III, 35, p.345. Gard. 
Chron. 1883, 19: 788. 
76. R. Lambertianus D. Dietr. Syn. Pl. 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. RF. natans 
Muae,/ex G. Don, Gen. Syst. 1:31, 1832, (not C. A. 
Meyer), is probably a form of this with leaves sometimes bifid. 
Mexico. 
