MEMOIRS FROM THE DEPARTMENT OF BOTANY OF COLUMBIA UNIVERSITY 101 
82. Potentilla Macounii. 
ILLUSTRATION: PLATE 41, f. 1. 
Cespitose ; stems generally more than one from the caudex, ascending, silky-villous, 
less than | dm. high, 1-2-leaved. Stipules ovate, 5-10 mm. long. Basal leaves many, 
pinnate with 8-5 pairs of rather approximate leaflets, silky on both sides and somewhat 
tomentose beneath ; leaflets cuneate, about 1 em. long, deeply cleft into oblong segments; 
stem leaves much reduced. Cyme few-flowered. Hypanthium silky-villous, in fruit 7-8 
mm. in diameter; bractlets lanceolate, often nearly as long as the ovate sepals. Sta- 
mens about 20. Style filiform. 
It much resembles the preceding species in habit, but differs in the larger bractlets, 
the longer and looser hairiness and the more numerous and deeply dissected leaflets. It 
is apparently nearly related to P. pinnatisecta, from which it differs mostly in the hairi- 
ness, the tomentum and the broader segments of the leaves. 
Alberta: John Macoun, No. 16709, 1897 (Crow’s nest Pass). 
Montana: Flodman, No. 556, 1896 (Little Belt Mountains). 
83. Potentilla luteosericea. 
Perennial by a thick deep root and a short erect caudex. Stems several, decumbent or ascend- 
ing, .5—2 dim. long, few-leaved, yellowish-silky. Basal leaves pinnate, with 1 or 2 approximate pairs of 
leaflets, densely yellowish-silky canescent on both sides ; leaflets cuneate or obovate, entire at the 
base, 8-7-toothed toward the apex. Hypanthium yellowish-silky, about 5 mm. in diameter ; bractlets 
ovate, obtuse, a little shorter than the ovate-lanceolate acutish sepals. Petals obcordate, light yel- 
low, exceeding the sepals by about a third. 
This resembles somewhat the figure of P. Dombeyi in Nestler’s Monograph, but that plant, ac- 
cording to Nestler and Lehmann, is only sparingly pilose. 
Lower California: 'T. 8. Brandegee, 1893 (San Pedro Martin ; type in Herb. Calif. Acad. Sei.) 
84. Potentilla rubricaulis Lehm. 
Potentilla rubricaulis Lehm. Stirp. Pug. 2: 11. 1830. 
Hool. Fl. Bor. Am. 1: nee ; Hat. Man. Ed. 7: 459; ‘Torr. & Gray, Fl. N. A. 1: 
438; Rey. Pot. 68; Eat. & Wr. N. Am. Bot. 374; Don, Gard. Dict. 2: 556; Dietr. Syn. 
Pl. 3: 185; Walp. Rep. 2: 32; ee 2: 482. 
InLusrraAtions: Lehm. Rev. Pot. pi. 30. Pate 40, f. 1; pistil, f. 2; stamen, f. 3 
fruiting hypanthium and calyx, f. 4. 
More or less cespitose; stems ascending or prostrate, generally not much over 1 dm. 
long, appressed silky-strigose, more or less leafy and branched. Stipules ovate, acute. 
Leaves pinnate of 2-3 approximate pairs and a sessile terminal leaflet, silky above, more 
or less white-tomentulose beneath ; leaflets 5-10 mm. long, obovate or oblong in out- 
