MEMOIRS FROM THE DEPARTMENT OF BOTANY OF COLUMBIA UNIVERSITY 67 
44. Potentilla staminea. 
Stem stout, 4-6 dm. high, leafy, more or less villous-tomentose. Basal leaves with densely 
woolly petioles about 1 dm. long, digitate with 7 leaflets, hairy but green above, densely white-tomen- 
tose and silky beneath ; leaflets obovate, 4-10 cm. long, coarsely crenate-serrate. Stem-leaves 3—5-folio- 
late, short-petioled or sessile. Cyme open with long pedicels. Hypanthium villous; bractlets oblong 
or lanceolate, about half as long as the ovate-acuminate sepals. Corolla 2.5-3 em. in diameter ; petals 
yellow, broadly obeordate, nearly twice as long as the sepals. Stamens about 40; styles filiform. 
This resembles most P. leptopetala, differing, however, in the greater size of the plant as well as 
of the flower, in the greater number of stamens and in the 7-foliolate basal leaves. 
Southern Mexico: Dr. Ghiesbrecht, Nos. 131 and 681, 1864-70. 
45. Potentilla leptopetala Lehm. 
Potentilla leptopetala Lehm. Ind. Sem. Hort. Bot. Hamb. 1830: 8. 1830. 
Lehm. Stirp. Pug. 3: 32 ; Linnaea, 13 : 264; Regensb. Bot. Zeitg. 1: 133, 1831%*; Rev. Pot. —uiIS3e 
Don, Gard. Dict. 2: 554; Dietr. Syn. Pl. 3: 183: Walp. Rep. 2: 28: Ann, 2: 498; Hemsley, Biol. 
CenterAmel 3G. 
Potentilla hiemalis Schlecht. Linnzea, 5: 572, 1830; Don, Gard. Dict. 2: 553. 
Potentilla frigida Schiede & Depp.; Lehm. Rey. Pot. 113. 1856. 
Itiustrations: Lehm. Rev. Pot. pil. 43. 
Stem ascending, 1—2-leaved, covered with long grayish reflexed hairs; basal leaves digitately 5- 
foliolate, pilose or glabrate and green above, white-tomentose and long silky beneath ; leaflets ovate, 
strongly nerved, serrate ; bractlets lanceolate, much shorter than the ovate sepals. Petals obcordate, 
scarcely equalling the sepals. 
In high altitudes of Central Mexico: Crus Blanca and San Salvador,* Schiede; Mineral del 
Monte, * C. Ehrenberg. 
46. Potentilla candida Rydberg. 
Potentilla gracilis vay. Wats. King. Exp. 5: 88. 1872. 
Potentilla candida Rydberg, Bull. Torr. Bot. Club, 24: 6. 1897. 
Inuustrations: Bull. Torr. Bot. Club, 24: pl. 287. PuaTE 23, f. 1; dissection of 
flower, f. 2; stamen, f. 3; pistil, f 4; fruiting hypanthium and calyx, ieee 
Stem low, 1-2 dm. high, densely white silky-strigose; stipules ovate, entire, nearly 
I cm. long; leaves on rather short petioles, densely silvery-silky on both sides, digitate ; 
leaflets 7-9, obovate in outline, 2-4 em. long, rather thick, deeply incised or cleft into 
large oblong teeth ; cyme rather dense; flowers about 1 em. in diameter: hypanthium 
white-silky ; bractlets lanceolate, much shorter than the ovate sepals; petals yellow, ob- 
cordate, a little exceeding the sepals. 
It most resembles a depauperate P. Blaschkeana, and differs mainly in the pubescence 
which is very dense on both sides of the leaves and silky; tomentum none. 
