280 NORTH AMERICAN FLORA [VoLuME 22 
ments of the antisepalous stamens triangular to lanceolate, those of the antipetalous ones 
lanceolate; pistils 8-15. 
TYPE LOCALITY: California. 
DISTRIBUTION : Sierra Nevada, California. 
ILLUSTRATION: Mem. Dep. Bot. Columbia Univ. 2: Al. 75. 
31. Horkelia congesta Hook. Bot. Mag. 56: p/. 2880. 1829. 
Sibbaldia congesta Dietr. Syn. Pl. 2: 1020. 1840. 
Potentilla congesta Baillon, Hist. Pl. 1: 369. 1867-9. 
Perennial, with a short caudex ; stem slender, strict, sparingly ciliate below, glabrous 
or finely puberulent above, 3-4dm. high; stipules pectinately dissected, the lower occasion- 
ally divided into linear segments as in the next section; basal leaves pinfiate; leaflets 4 or 
5 pairs, sparingly appressed-silky and ciliate, light-green, thin and shining, linear-oblong, 
1-1.5 cm. long, entire, except at the very apex, where they are deeply 2-3-toothed, the 
teeth acute; stem-leaves smaller, with linear leaflets; ‘cyme branched, with few upright 
branches terminated by small subcapitate clusters of flowers; hypanthium hemispheric, 
tinged with light-brown, sparingly silky-villous, about 5mm. in diameter ; bractlets linear- 
filiform, a little shorter than the ovate-acuminate sepals, which are 2-3 mm. long; petals 
broadly spatulate or obovate, yellowish, at least in the dry state, exceeding the sepals by 
one-half; filaments all lanceolate. 
TYPE LOCALITY : Cape Mendocino, California. 
DISTRIBUTION: Oregon and northern California. 
ILLUSTRATIONS: Hook. Bot. Mag. 56: pl. 2880 ; Mem. Dep. Bot. Columbia Univ. 2: pl. 76. 
VII. Hirsutae. Resembling the preceding group but with more numerous and usually 
deeply dissected-leaflets, broader petals, broader filaments, more numerous pistils, and the 
lower stipules once or twice pinnately dissected into linear or filiform hairy segments. 
32. Horkelia pulchra Rydberg, sp. nov. 
Perennial, with a thick root and short woody caudex; stems several, about 2 dm. high, 
sparingly silky-hirsute, tinged with red; basal leaves numerous, 4-6 cm. long; leaflets 6-9 
pairs, 6-8 mm. long, cuneate, deeply 3-5-cleft at the apex into oblong or lanceolate lobes, 
appressed-silky on both sides, somewhat sericeous; stem-leaves smaller, with fewer and 
narrower leaflets; stipules pectinately divided into linear segments, those of the basal 
leaves into filiform, hairy, curled divisions; cyme dense and subcapitate; hypanthium 
cupulate, appressed-silky ; flowers 4 mm. wide; bractlets linear or subulate, 3 mm. long; 
sepals ovate-lanceolate, acute, 4 mm. long; petals apparently light-yellow, broadly cuneate, 
emarginate, slightly exceeding the sepals; filaments lance-subulate; pistils 5-10. 
Type collected on Mount Shasta, in 1887, C. C. Parry (herb. Columbia Univ.). 
33. Horkelia hirsuta Lindl. Bot. Reg. 23: sub f/. 1997. 1837. 
Horkelia congesta T, & G. Fl. N. Am. 1: 434, 1840. Not H. congesia Hook. 1829. 
Horkelia pilosa Nutt.; T. & G. Fl. N. Am. 1: 434, as synonym. 1840. 
Perennial, with a short scaly and very hirsute caudex; stems about 3 dm. high, strict 
and simple, somewhat striate, hirsute with long spreading hairs, a little glandular above; 
stipules pectinately divided into linear segments, those of the basal leaves very finely dis- 
sected and very hairy; basal leaves numerous, pinnate, sparingly silky-pubescent, the 
rachis long-hirsute; leaflets 5-9 pairs, cuneate or oblong-cuneate, 1-2 cm. long, 3-5-toothed 
at the apex, with oblong acute teeth; stem-leaves similar but with nearly linear leaflets ; 
cyme very dense and flowers subsessile; hypanthium cupulate, about half as deep as wide, 
about 5 mm. in diameter, silky-hirsute; bractlets linear, nearly filiform, a little shorter 
than the lanceolate or ovate-triangular sepals, which are about 3 mm. long; petals white, 
broadly spatulate or obovate, a little exceeding the sepals. 
TYPE LOCALITY: California. 
DISTRIBUTION : Oregon and northern California. 
ILLUSTRATION : Mem. Dep. Bot. Columbia Univ. 2: p/. 77. 
