282 ‘NORTH AMERICAN FLORA [VoLUME 22 
dissected into oblong or lanceolate lobes; basal leaves numerous, more or less villous, 
especially the rachis, in age glabrate, with 5-20 pairs of small crowded leaflets, these often 
divided to the base into two or three oblong or oval, entire or 2-3-cleft segments, 3-10 
mm, long; cyme open with divergent branches but with very short pedicels; hypanthium 
cupulate, villous and glandular, in fruit 3-4 mm. in diameter; bractlets linear or linear- 
lanceolate, smaller than the lanceolate sepals, which are about 3 mm. long; petals white, 
broadly spatulate, with somewhat retuse apex, a little exceeding the sepals; pistils few. 
TYPE LOCALITY : Near Waldo, Oregon. 
DISTRIBUTION : Siskiyou Mountains of California and Oregon. 
ILLUSTRATION : Mem. Dept. Bot. Columbia Univ. 2: p/. 81, f. 1-5. 
15. HORKELIELLA Rydberg, gen. nov. 
Horkelia § Horkeliella Rydb. Mem. Dep. Bot. Columbia Univ. 2: 120, 1898. 
Perennial herbs, with scaly rootstock and short erect caudex. Leaves pinnate, with very 
numerous, crowded, deeply cleft leaflets. Inflorescence openly cymose, rather few-flow- 
ered. Hypanthium deeply campanulate. Bractlets, sepals, and petals 5. Sepals lanceo- 
late, in anthesis reflexed. Petals oblanceolate or cuneate, white. Stamens 20, inserted 
in the throat of the hypanthium ; filaments dilated, white, subulate or lanceolate. Recep- 
tacle conic or hemispheric. Pistils numerous; style long and slender, terminal, slightly 
thickened and glandular below. 
Type species, Horkelia purpurascens S. Wats. 
Stem 3-4 dm. high, glabrous; leaflets 5-8 mm. long. oan 1. A. 
Stem 1-2 dm: high, pubescent; leaflets 2-3 mm. long.-+95e* "7 
Petals emarginate ; stem pubescent but not glandular. 2. HY. purpurascens.. 
Petals not emarginate ; stem glandular. 3. H. Congdonis. 
pinetorum, 
1. Horkeliella pinetorum (Coville) Rydberg. 
Potentilla purpurascens pinetorum Coville, Proc. Biol. Soc. Wash. 7: 77. 1892. 
Horkelia pinetorum Rydb. Bull. Torrey Club 25: 55.° 1898. ; 
Perennial, with deep woody root and cespitose caudex ; stem glabrous, about 3 dm. high, 
slender and somewhat branched; stipules ovate, entire, about 5 mm. long, basal leaves 
numerous, 1-1.5 dm. long, pinnate, with 15-20 pairs of thin glabrous leaflets, which are 
5-7 mm. long and divided to near the base into 2-4 broadly oblong segments; stem-leaves 
minute; cyme open, with ascending branches; hypanthium deeply cupulate or nearly cam- 
panulate, hairy, tinged with brown or purple; bractlets oblong or ovate, erect, about a third 
the length of the reflexed lanceolate sepals, which are 4-5 mm, long; petals oblong-spatu- 
late to strap-shaped, white, slightly exceeding, the sepals, emarginate. 
TYPE LOCALITY: Trout Meadow, Sierra Nevada, Tulare County, California. 
DISTRIBUTION : Southern Sierra Nevada, California. 
ILLUSTRATION: Mem. Dep. Bot. Columbia Univ. 2: pi. 8&3. 
2. Horkeliella purpurascens (S. Wats.) Rydberg. 
Horkelia purpurascens S. Wats. Proc. Am. Acad, 11: 148. 1876. 
Potentilla purpurascens Greene, Pittonia 1: 105. 1887. 
Perennial, with a deep woody root, and short erect caudex covered with brown scales; 
stem strict, 1-2 dm. high, densely but finely hirsute; stipules ovate, entire, 3-4 mm. long; 
basal leaves numerous, less than 1 dm. long, densely hirsute, pinnate, with about 20 pairs 
of rather thick crowded leaflets, which are only 2-4 mm. long and divided almost to the 
base into 2-4 oval segments; cyme narrow with upright branches; hypanthium hirsute, 
cupnlate or nearly campanulate ; bractlets linear, about half as long as the lanceolate sepals, 
which are 3-4 mm. long; petals oblong to strap-shaped, emarginate, slightly exceeding the 
sepals. 
TYPE LOCALITY : Headwaters of Kern River, California. 
DISTRIBUTION > Known only from the type locality. 
pl aeons Rothr. Bot. Wheeler’s Surv. £/, 3A; Mem. Dep. Bot. Columbia Univ. 2: 
