Part 4, 1908] ROSACEAE 373 
lower stipules lanceolate, the upper ovate, acuminate, and usually deeply toothed ; basal 
leaves with petioles 2-10 cm. long, pinnate, sometimes interruptedly so; leaflets 7-9 
sparingly hairy, nearly glabrous on the upper surface; leaflets obovate, generally obtuse, 
simply or doubly serrate with broad teeth, the upper usually a little larger, 1-3 cm. 
long ; stem-leaves smaller, short-petioled, 3-7-foliate ; flowers in an open many-flowered 
cyme, 10-15 mm. in diameter; hypanthium glandular-hirsute, in fruit 6-7 mm. broad ; 
bractlets linear-lanceolate, 4-5 mm. long, much shorter than the oblong or ovate-lanceo- 
late, gradually acuminate or acute sepals, which are 6-7mm. or in fruit about 1 cm. long; 
petals obovate, about equaling the sepals; stamens 20-25; pistils many; styles fusiform. 
Type Locairy: California. 
DISTRIBUTION: Mountains, from Black Hills of South Dakota’to British Columbia, California, 
and New Mexico. 
ILLUSTRATIONS: Bot. Reg. 19: 1. 1583 ; Mem. Dep. Bot. Columbia Univ. 2: p/. 107. 
16. Drymocallis arizonica Rydberg, sp. nov. 
Stem 3-5 dm. high, sparingly viscid-villous, often tinged with red; stipules ovate, 
often toothed; basal leaves 1-1.5 dm. long, with about 9 leaflets; petioles sparingly 
viscid-villous, 3-7 cm. long; upper leaflets broadly obovate, coarsely serrate with ovate 
teeth, the lateral leaflets almost orbicular; lower stem-leaves similar, the upper 3-foliolate; 
cyme rather dense, few-flowered ; hypanthium densely viscidly short-villous, in fruit 7mm. 
broad; bractlets oblong, acute, 3-4 mm. long; sepals ovate-lanceolate, acuminate, 5 mm. 
long, in fruit 7 mm. long; petals nearly orbicular, about equaling the sepals; stamens, 
about 25; pistils many; styles fusiform. 
Type collected about Mormon Lake, Arizona, in 1898, D. 7. MacDougal 64 (herb. N. V. Bot. 
Gard.). 
DISTRIBUTION : Mountains of Arizona and St. George region of Utah. 
17. Drymocallis Hanseni (Greene) Rydb. Mem. Dep. Bot. Columbia 
Univ. 2: 200. 1898. 
Potentilla glandulosa nevadensis Greene, Fl. Fran. 65. 1891. Not P. glandulosa nevadensis S. 
Wats. 1876. 
Potentilla Hanseni Greene, Pittonia 3: 20. 1896. 
Stem 5-8 dm. high, rather slender, finely and densely villous, especially the upper 
part, less glandular than the preceding, simple below, branched above, with nearly erect 
branches; stipules lanceolate; basal leaves with petioles 3-6 cm. long, more or less puber- 
ulent, pinnate, with 9-11 leaflets, which are rounded-obovate, obtuse, or the upper ones 
acute, coarsely serrate, 1-4 cm. long; stem-leaves smaller, 3-5-foliolate, with acute leaf- 
lets; flowers in a narrow cyme, 8-12 mm. broad; hypanthium densely hirsute; bractlets 
oblong-lanceolate, less than half the length of the ovate acute sepals, which are 5 mm. 
long, or in fruit 7 mm.; petals yellow, broadly obovate or almost orbicular, a little exceed- 
ing the calyx; stamens about 25; pistils many; styles thickened and glandular, 
Tyre LOCALITY : Middle and higher Sierras of California. — 
DISTRIBUTION : Sierra Nevada and San Bernardino mountains. 
18. Drymocallis amplifolia Rydberg, sp. nov. 
Perennial, with a rootstock ; stem 6-7 dm. high, sparingly viscid-villous with long 
spreading hairs ; basal leaves 1.5-2 dm. Jong, with 5, rarely 7, leaflets ; rachis with spread- 
ing hairs; terminal leaflets rhombic or cuneate-flabelliform, 4-7 cm. long, 3-4.5 cm. wide, 
coarsely and often doubly serrate with broadly ovate teeth, thin, sparingly hairy on both 
sides, stalked, lateral ones obovate, oblique and somewhat smaller; lower stem-leaves 
similar, the upper 3-foliolate with large rhombic leaflets; inflorescence open and somewhat 
leafy, cymose ; bractlets oblong, 2 mm. long, in fruit 3mm, long or more; sepals elliptic 
or elliptic-lanceolate, mucronate, 4-5 mm. long or in fruit 8 mm. long; petals pale-yellow, 
obovate, 4 mm. long; stamens about 25; pistils many; styles fusiform. 
Type collected near the Columbia River, western Klickitat County, Washington, in 1894, W. 
N. Suksdorf 1761 (herb. N. ¥. Bot. Gard.). 
