336 NORTH AMERICAN FLORA |VoLumE 22 
acuminate, 3 mm. long; bractlets ovate to elliptic, 2mm. long; petals yellow, spatulate- 
oblanceolate, acutish, 2 mm. long; stamens 20-30; filaments filiform; anthers didymous ; 
pistils 8-10; styles filiform, attached below the apex. 
TYPE LOCALITY : San Rafael Mountains, Lower California. 
DISTRIBUTION : Lower California and southern California. 
319. Potentilla rosulata Rydb. Bull. Torrey Club 26: 542. 1899. 
Glandular and viscid-pubescent perennial; caudex thick and lignose, topped with 
dense rosettes of leaves and short stems; the latter, at least in the type specimens, less. 
than 1 dm. high; basal leaves 4-5 cm. long, long-petioled, pinnately 5-foliolate; stem- 
leaves ternate, short-petioled, or the upper subsessile; lower stipules lanceolate and thin ; 
the upper ovate and rather thick; leaflets thick, densely viscid and glandular-pubescent, 
broadly obovate, or the terminal orbicular, deeply crenate or somewhat cleft, 7-10 mm. 
long; pedicels 5-15 mm. long; hypanthium about 5 mm. in diameter, densely viscid- 
pubescent; bractlets ovate, about half as long as: the broadly triangular-ovate, acute or 
acuminate sepals; petals small, oblong, whitish or light-yellow, about as long as the bract- 
lets; stamens between 30 and 40; anthers distinctly didymous; pistils 20-40; styles fili- 
form, attached near the apex of the ovary. 
TYPE LOCALITY : Twenty-nine Palms, Colorado Desert, California. 
DISTRIBUTION: Known only from the type locality. 
120. Potentilla acuminata Hall, Univ. Calif. Publ. Bot. 1: 86. 1902. 
Perennial, with a stout woody root and candex; stems several, glandular-pubescent, 
1-1.5 dm. high; basal leaves pinnate with 3-5 leaflets; stem-leaves 1-3-foliolate; stipules 
lanceolate, acute, entire ; leaflets orbicular or cuneate-obovate, 5-15 mm. long, deeply serrate 
with lance-elliptic teeth, thin, glandular-puberulent; inflorescence open, few-flowered ; 
hypanthium hemispheric, 2 mm. wide; bractlets linear-lanceolate to oblong, acute, 1.5 mm. 
long; sepals broadly ovate-acuminate, 3 mm. long; petals yellow, lanceolate, acuminate 
or acute, nearly 3 mm. long; stamens 20-30; pistils 10 or more; styles filiform, inserted 
below the incurved tip of the ovary. 
TYPE LOCALITY : Cracks of rocks along Chino Creek, San Jacinto Mountains, California. 
DISTRIBUTION : San Jacinto and White Mountains, California. 
XXVI. Brevifoliae. Low alpine plants with a perennial short rootstock and few-leaved 
erect or ascending stems, seldom much over 1 dm. high. Leaflets pinnate, with 3-5 
leaflets, nearly glabrous. Petals obcordate, yellow, exceeding the sepals. Apex of the 
achene slightly incurved, with the long slender filiform style inserted below the tip. 
121. Potentilla brevifolia Nutt.; T. & G. Fl. N. Am. 1: 442. 1840. 
Plant very low, cespitose, perennial, with a short caudex; stems less than 1 cm. high, 
slender, 1- or 2-leaved, glandular-puberulent ; stipules about 0.5 cm. long, broadly ovate, 
entire, the lower scarious; basal leaves many, small, pinnate with 1-2 pairs of leaflets, puberu- 
lent; leaflets suborbicular with cuneate base, 2~3-cleft and crenate, 0.5-1 cm.long; stem- 
leaves much reduced, and subsessile; hypanthium glandular-puberulent, sometimes with a 
few long hairs, in fruit less than 5 mm. broad; flowers about 8 mm. in diameter; bract- 
lets oblong, obtuse or acutish, alittle shorter than the sepals, which are broadly ovate and 
acute or slightly mucronate, 4 mm. long; petals a little longer than the sepals, yellow, obo- 
vate, and often a little notched; stamens about 20; pistils many. 
_ TYPE LOCALITY: Near the summit of mountains, within the perpetual snow line, near Goodier 
River of the Oregon. 
DISTRIBUTION : High mountains from Oregon to western Wyoming. 
ILLUSTRATION : Mem. Dep. Bot. Columbia Univ. 2: pi. 44, 7. 1-5. 
122. Potentilla Grayi S.Wats. Proc. Am. Acad. 8: 560. 1873. 
Potentilla Clarkiana Kellogg, Proc. Calif. Acad. 7: 94. 1876. 
Somewhat tufted, perennial, with short candex; stems subscapose, 5-15 cm. high, mi- 
nutely strigose or glabrous, few-flowered ; stipules ovate, acute, entire or often few-toothed ; 
