Parr 3, 1908] ROSACEAE 277 
hairs, or almost glabrous, thin, cleft at the apex with oblong or lanceolate lobes; stem- 
leaves with 1-4 pairs of somewhat narrower and smaller leaflets; inflorescence rather open ; 
hypanthium cupulate, usually purplish, 1.5 mm. high, glandular-puberulent and slightly 
hairy; bractlets linear, 1 mm. long; sepals lanceolate, 1.5 mm. long, acuminate; petals 
white, broadly cuneate, about 2 mm. long; filaments triangular; pistils rather few. 
TYPE LOCALITY: Sierra County, California. 
DISTRIBUTION : California and Oregon. 
ILLUSTRATION: Mem. Dep, Bot. Columbia Univ. 2: p/ 72. 
21. Horkelia parviflora Nutt.; H. & A. Bot. 
Beech. Voy. 338. 1838. 
Potentilia Andersonit Greene, Pittonia 1: 104. 1887. 
Perennial, witha short woody caudex ; stems erect or ascending, densely glandular and 
more or less tinged with red, 1-2 dm. high; stipules lanceolate; basal leaves numerous ; 
leaflets 5-8 pairs, more or less densely hirsute and glandular, obovate or nearly or- 
bicular, coarsely crenate; stem-leaves similar but with cuneate leaflets; cyme subcapitate ; 
hypanthium cup-shaped, 2-3 mm. in diameter, hirsute and glandular, often tinged with 
purple; bractlets linear or nearly filiform, much shorter than the broadly lanceolate sepals, 
which are 2-3 mm. long; petals broadly cuneate, spatulate or obovate, 2-3 mm. long, 
emarginate. 
TYPE LOCALITY: ‘‘ California’’; but Nuttall’s specimens were collected on the plains of the 
Oregon towards the Rocky Mountains. 
DISTRIBUTION: Sierra Nevada of California and mountains of adjacent Nevada and Oregon. 
ILLUSTRATION: Mem. Dep. Bot. Columbia Univ. 2: £1. 68. 
22. Horkelia pseudocapitata Rydb. ; Howell, Fl. NW. 
Am.1: 180. 1898. 
Horkelia congesta Newb. Pacif, R. R. Rep. 63: 73. 1857. Not A. congesia Hook. 1829. 
Perennial, with a short woody caudex; stem ascending or erect, 3-6 dm. high, more or less 
villous and usually not at all glandular, simple or branched above; stipules ovate or ovate- 
lanceolate, acute, often’ more or less toothed ; basal leaves 1-2 dm. long, pinnate; leaflets 
4-6 pairs, often very densely villous but sometimes only a little hairy, obovate or cuneate, 
toothed toward the apex, generally obtuse; stem-leaves similar but with fewer leaflets, 
those subtending the subcapitate many-flowered cyme nearly equaling the flowers; hypan- 
thium woolly-hirsute, cupulate; bractlets linear, shorter than the lanceolate acute sepals, 
which are about 4mm. long; petals broadly cuneate-spatulate, about 5 mm. long and 3 
mm. wide, truncate at the apex. 
TYPE LOCALITY: Tanesville, California. 
DISTRIBUTION : Northern California and western Nevada. 
ILLUSTRATION : Mem. Dep. Bot. Columbia Univ. 2: pl. 69. 
23. Horkelia capitata Lindl. Bot. Reg. 23: sub A/. 1997. 1837. 
Potentilla capitata Greene, Pittonia 1: 104. 1887. 
Perennial ; stem erect, rather simple, 4-6 dm. high, nearly glabrous below, glandular- 
hirsute above; stipules broadly lanceolate, 2-3 cm. long, acuminate, more or less toothed ; 
basal leaves 2-3 dm. long, pinnate, nearly glabrous; leaflets 5-7 pairs, obovate or oval, 2-3 
em. long, deeply incised-toothed ; stem-leaves similar, but the upper with narrower ob- 
Janceolate acute leaflets, those subtending the subcapitate cyme simple, broad and 
palmately divided into lanceolate, acuminate, glandular-ciliate segments, which about equal 
the fowers; hypanthium glandular-hirsute, deeply cup-shaped; bractlets linear, nearly 
equaling the triangular-lanceolate acuminate sepals, which are 45 mm. long; petals 
broadly cuneate 5-6 mm. long and 4 mm. wide, much exceeding the sepals, truncate at 
the apex. 
TYPE LocaLity : California. 
DISTRIBUTION : Mountains of Oregon and Idaho; California (?). 
ILLUSTRATIONS: Gartenflora 1872: p/. 711, f. 4-6; Mem. Dep. Bot. Columbia Univ. 2: pl. 70. 
