9 
MEMOIRS FROM THE DEPARTMENT OF BOTANY OF COLUMBIA UNIVERSITY oo 
§ 13. BIFLORAE. 
65. Potentilla biflora Willd. 
Potentilla biflora Willd.; Schlecht. in Mag. Ges. Naturf. Fr. Berlin, 7: 297. 1813. 
Lehm. Mon. Pot. 30 and 192; Sprengel, Syst. Veg. 2: 541; Seringe, in DC. Prod. 
2: 586; Don, Gard. Dict. 2: 552; Dietr. Syn. Pl. 3: 180; Lehm. Rev. Pot. 20; Ledeb. 
PIE Ross, 2): 61: 
Kat. Man. Ed. 7: 457; Torr. & Gray, Fl. N. Am. 1: 442; Eat. & Wr. N. A. Bot. 
3(2; Wats. Proc. Am. Acad. 8: 561; Rydb. Bull. Torr. Bot. Club, 24: 13. 
Richardson, in Frankl. Ist Journ. 740; Ed. 2, App. 21; Cham. and Schlecht. in 
Voy. 123; Ledeb. Fl. Ross. 2 : 61; Seemann, Bot. Herald, 29; Macoun, Cat. Can. Pl. 140. 
Potentilla bifolia Walp. Ann, 2: 470. 1852. 
Innustrations: Lehm. Mon. Pot. pl. 20; Rey. Pot. pl. 62, f. 1. PuatE 38, f. 6; 
dissection of flower, f. 7; pistil, f. 8; fruiting hypanthium and calyx, f. 9. 
lannaea 2: 24; Lehm. in Hook. FI. Bor. Am. 1: 195; Hook. and Arn. in Beechey’s 
Cespitose ; flowering branches seape-like, 1—2-, seldom few-flowered, erect, less than 1 
dm. high, sparingly hirsute-villous. Stipules lanceolate, acuminate, brown. Leaves 
basal, ternate, with the middle leaflet deeply 3-divided, the lateral ones 2-divided into 
linear segments with more or less revolute margins, sparingly villous-hirsute, in age 
nearly glabrous above, and with a strong midrib beneath. Flowers less than 1 em. in 
diameter. Hypanthium sparingly hairy, in fruit about 7 mm. in diameter; bractlets 
oblong, obtuse, about equalling the ovate-lanceolate acute sepals. Petals obovate, slightly 
emarginate, longer than the sepals, yellow with an orange spot. 
It is a native of northeastern Asia, Alaska and the Arctic coast of North America, 
and a rather rare plant. 
Alaska: Dy. Jerrans, 1894 (Cape Thomas); J. T. White, 1894 (Port Clarence) ; 
Muir. No. 112, 1881. 
Wrangell Island: Dr. Ross, 1881. 
§ 14. NIVEAE. 
66. Potentilla Pringlei Wats. 
Potentilla Pringlei Wats. Proc. Am. Acad. 23: 272. 1888. 
“Stem decumbent, a foot long or more including the paniculate few-flowered inflorescence, finely 
tomentose; leaves mostly radical, ternately digitate; leaflets broadly linear (1 or 2 inches long by 
about 2 lines broad), acutely toothed, nearly glabrous above, densely white-tomentose beneath ; flowers 
