278 NORTH AMERICAN FLORA [VoLUME 22 
24, Horkelia fusca Lindl. Bot. Reg. 23: p/. 7997. 1837. 
Potentilla Douglasit Greene, Pittonia 1: 103. 1887. 
Perennial, with a short woody caudex; stems several, 2-6 dm. high, erect or ascending, 
often much branched, more or less glandular, especially upward, often more or less tinged 
with brown or purple; stipules ovate to lanceolate, acute, more or less toothed, 1-2 cm. 
long ; basal leaves generally numerous, 1-2 dm. long, somewhat glandular-pubescent or 
glabrate ; leaflets 5-7 pairs, obovate or cuneate, toothed or incised toward the apex, 0.75-2 
cm. long; stem-leaves similar but with fewer leaflets; leaves subtending the subcapitate 
cymes small, much shorter than the heads; hypanthium glandular-villous, cupulate, more 
or less tinged with brown or purple; bractlets linear, much shorter than the ovate-lanceo- 
late sepals; petals broadly cuneate, 3-4 mm. long and 2 mm. wide, truncate at the apex. 
TYPE LocALity: California. 
DISTRIBUTION: Oregon, California, and Nevada. . : 
ILLUSTRATIONS: Lindl. Bot. Reg. 23: f/. 1997; Mem. Dep. Bot. Columbia Univ. 2: pl. 71. 
25. Horkelia tenuisecta Rydberg, sp. nov. 
Horkelia tenella Rydb. Mem. Dep. Bot. Columbia Univ. 2: 136, in part. 1898. 
Perennial, with a taproot and short woody caudex; stem 1-3 dm. high, slender, erect 
and simple, more or less tinged with red; often nearly glabrous below, densely glandular 
above; stipules lanceolate, generally with a few coarse teeth; basal leaves numerous, pin- 
nate, hirsute-puberulent and glandular or glabrate; leaflets 5-10 pairs, 0.5-1 cm. long, 
cuneate or obovate in outline, divided to below the middle or sometimes almost to the base 
into linear or linear-oblong segments; stem-leaves few and similar; those subtending the 
subcapitate or sometimes quite open cymes small and simple, incised, shorter than the 
flower-clusters; hypanthium cup-shaped, about 4 mm. in diameter, glandular-hirsute; 
bractlets linear, much shorter than the lanceolate-triangular sepals, which are about 4 mm. 
long; petals cuneate, slightly emarginate, 4 mm. long and 3 mm. wide, truncate at the 
apex. 
Type collected in Falcon Valley, Washington, in 1882, W..N. Suksdorf 2492. 
DISTRIBUTION : Meadows and open woods, California, Oregon, and Washington. 
V. Sericatae. Stems slender and ascending; leaves pinnate with very numerous small 
imbricate cinereous or hispidulous leaflets resembling those of some species of Jvesia. Inflo- 
rescence cymose, open, few-flowered. Hypanthium small, hemispheric; bractlets linear, 
shorter than the sepals. Petals obcordate, more or less unguiculate, white. 
26. Horkelia sericata S. Wats. Proc. Am. Acad. 20: 364. 1885. 
Potentilla sericata Greene, Pittonia 1: 104. 1887. 
Perennial, witha short caudex covered with densely hirsute scales; stems several, very 
slender, strict and simple, sometimes decumbent at the base, somewhat villous and tinged 
with red; stipules lanceolate, about 5 mm. long, mostly entire; basal leaves many, densely 
white-silky-villous, pinnate, with 10-18 very crowded pairs of small leaflets, which are 
5 mm, long, ovate-oblong and entire, or cleft to the base into 2-3 similar segments; stem- 
leaves similar but smaller; cyme few-flowered with elongate branches and very short ped- 
icels; hypanthium cupulate, densely silky, 3-4 mm. in diameter; bractlets linear, shorter 
than the lanceolate sepals, which are about 3mm. long; petals obcordate, unguiculate, 
much exceeding the sepals, white. 
TYPE LOCALITY : Summit of Coast Range in Curry County, Oregon. 
DISTRIBUTION: Coast Mountains, southern Oregon. - 
ILLUSTRATION : Mem. Dep. Bot. Columbia Univ. 2: p/. 81, f. 6-10. 
27. Horkelia hispidula Rydberg, sp. nov. 
Perennial, withashort erect caudex covered by the remains of old leaves; stems about 
2 dm. high, slender, sparingly hirsute and glandular-puberulent; leaves mostly basal, pin- 
nate, with 13-25 rather crowded leaflets, densely hirsute with short hairs; leaflets cuneate- 
flabelliform in outline, 4-6 mm. long, divided to near the base into 3-6 spatulate divisions; 
