Parr 3, 1908] ROSACEAE 281 
34. Horkelia daucifolia (Greene) Rydb. Bull. Torrey 
Club 25: 55. 1898. 
FTorkelia congesta Brewer & Wats. Bot. Calif. 1: 181, in part. 1876. 
Potentilla daucifolia Greene, Pittonia 1: 160. 1888. 
Potentilla congesta lobata Lemmon, Bull, Torrey Club 16: 221. 1889. 
Perennial, with a short caudex covered with densely pubescent scales; stem about 3 
dm. high, strict and mostly simple, pilose with long fine hairs and glandular throughout; 
stipules pectinately divided into linear segments, those of the basal leaves finely twice dis- 
sected into nearly filiform, hairy, more or less curled segments; leaves piniate, sparingly 
silky-pilose, the rachis with long spreading hairs; leaflets 8-12 pairs, 1-3 cm. long, di- 
vided to near the base into linear acute segments; cyme more open than in H. hirsuta ; 
pedicels 3-10 mm. long; hypanthium silky-pilose, cupulate, in fruit about 8 mm. in diam- 
eter; bractlets linear, nearly subulate, a little shorter than the broadly lanceolate sepals, 
which are 5-6mm. long; petals cream-colored, spatulate-oblong, a little exceeding the sepals. 
TYPE LOCALITY: Klamath and Shasta Valleys, California. 
DISTRIBUTION: Northern California and southern Oregon. 
ILLUSTRATION: Mem. Dep. Bot. Columbia Univ. 2: pi. 78. 
35. Horkelia caruifolia Rydb.; Howell, Fl. NW. Am. 1: 181. 1898. 
Perennial, with a short scaly caudex; stem slender, strict, simple, silky-pilose and 
villous-puberulent, but not at all glandular; stipules pectinately dissected into very nar- 
rowly linear segments, those of the basal leaves twice dissected into nearly filiform curled 
and hairy segments; leaves pinnate, sparingly silky-pilose, the rachis with divergent 
hairs; leaflets 6-10 pairs, 1-2 cm. long, finely dissected into narrowly linear segments ; 
cyme rather dense, and pedicels very short; hypanthium silky-villous, cupulate, 5-7 mm. 
in diameter; bractlets linear, shorter than the broadly lanceolate-acute sepals, which are 
about 5 mm. long; petals broadly cuneate or obcordate, with a distinct claw, a little exceed- 
ing the sepals. 
TYPE LOCALITY: On high hills, near Ashland, Rogue River Valley, Oregon. 
DISTRIBUTION : Type locality and vicinity. 
ILLUSTRATION: Men. Dep. Bot. Columbia Univ. 2: £1. 79. 
36. Horkelia laxiflora (Drew) Rydb. Bull. Torrey 
Club 25: 55. 1898. 
Potentilla laxifiora Drew, Bull. Torrey Club 16: 151, 1889. 
Perennial, with a taproot and short woody caudex covered with densely hirsute scales ; 
stem rather slender, ascending, simple below, 2-4 dm. high, nearly glabrous; lower stipules 
finely divided into filiform, more or less hairy, curled segments, the upper lanceolate, 5-10 
mm. long, more or less toothed; basal leaves many, slightly hairy, in age glabrate, pin- 
nate; leaflets 10-12 pairs, cuneate-flabelliform, cleft at the apex for about half their 
length into 2-5 oblong acute divisions; stem-leaves small and few; cyme open and 
branched; branches divergent-ascending ; pedicels 3-10 mm. long; hypanthium finely 
puberulent, cupulate, in fruit 3-4 mm. in diameter; bractlets linear, much smaller than 
the triangular-lanceolate acuminate sepals; petals white, spatulate, exceeding the sepals; 
filaments white, oblong-subulate; pistils few. 
TYPE LOCALITY: Hy-Am-Pum Valley, California. 
DISTRIBUTION : Northern California and southern Oregon. 
ILLUSTRATION: Mem. Dep. Bot. Columbia Univ. 2: p/. 80. 
37. Horkelia Howellii (Greene) Rydb. Bull. Torrey 
Club 25: 55. 1898. 
Potentilla Howellit Greene, Pittonia 1: 104. 1887. 
Perennial, with a taproot and short caudex covered with densely hispid scales (remains 
of the lower part of the stipules); stem slender, strict and simple, more or less red, spar- 
ingly villous and somewhat glandular, 2-4 dm. high; lower stipules finely twice dissected 
into filiform, curved and hairy segments, the upper 5-10 mm. long, ovate, more or less 
