MEMOIRS FROM THE DEPARTMENT OF BOTANY OF COLUMBIA UNIVERSITY 69 
48. Potentilla Blaschkeana Turcz. 
Potentilla Blaschkeana Turez; Lehm. in Otto, Gart. u. Blumenz. 9: 506. 1853. 
Lehm. Ind. Sem. Hort. Hamb. 1853: 9; Rev. Pot. 107; Rydb. Bull. Torr. Bot. 
Club; 24: 6: 
Potentilla- gracilis Wats. King’s Rep. 5: 88. 1871. Not Dougl. 1829. 
Wats. Proc. Am. Acad. 8: 557 (in part); Brewer & Wats. Bot. Cal. 1: 179 (mainly); 
Rothrock, U. S. Geol. Surv. 4: 113; Coult. Man. Rocky Mts. 85 (in part); U.S. Geol. 
Surv. 1872: 765; Tweedy, FI. Yell. Nat. Park, 35; Rattan, An. Key W. Coast Bot. 51; 
Greene, Fl. Fran. 1: 64; Aven Nelson, Wy. Exp. Sta. Bull. 28: 102, in part; K. Bran- 
degee, Zoe, 2: 162. 
Macoun, Cat. Can. Pl. 138 and 517. In part. 
Potentilla gracilis flabelliformis Newberry, Pac. R. R. Rep. 6: Part 3, 72. 1857. 
JuLusrrations: Lehm. Rey. Pot. pl. 64. Puare 25, f. 1; dissection of flower, ees 
pistil, f. 3; stamen, f. 4; fruiting hypanthium and calyx, f. 5. 
Stem stout, 5-8 dm. high, sparingly silky, branched above. Stipules large, 1-2 em. 
long, lanceolate or ovate-lanceolate, acute, the upper often coarsely toothed. Basal leaves 
digitate, of about 7 leaflets, silky, or nearly smooth and green above, white-tomentose be- 
neath, with petioles 5-15 cm. long; leaflets about .5 em. long, obovate in outline, deeply 
toothed or cleft into ovate or oblong teeth, often divergent. Stem leaves similar but 
smaller and short-petioled. Cyme many-flowered and open. Hypanthium silky, in 
fruit often over 1 em. in diameter; bractlets oblong-lanceolate, often much shorter than 
the broadly lanceolate long-acuminate sepals. Corolla 15-20 mm. in diameter; petals 
broadly obeordate, deeply notched at the apex, much longer than the sepals. 
This differs from P. gracilis in stouter habit, ascending branches, larger flowers and 
broader leaflets, which are obovate, deeply toothed or cleft into ovate or oblong teeth, 
silky and green above, silky and tomentose beneath. It must be admitted that this 
species is near to the preceding ; it was merged therein by Watson, butit is evidently 
not as near P. gracilis as is P. pulcherrima, which differs only in the form of the 
teeth. 
P. Blaschkeana is common from California to Wyoming and northward as far as 
Kodiak, off Alaska. 
49. Potentilla viridescens. 
Stem 5-7 dm. high, sparingly silky with appressed or slightly spreading hairs, 
branched above, with long spreading branches. Basal leaves several, with petioles 1-2 dm. 
