MEMOIRS FROM THE DEPARTMENT OF BOTANY OF COLUMBIA UNIVERSITY 153 
Rattan, An. Key W. Coast Bot. 52. 
Potentilla decipiens Greene, Pittonia, 1: 106. As to synonyms. 1887. Not Jordan. 
Ittustrations: PLATE 93, f. 1; leaflets, f 2; stipules, fi 3; dissection of flower, /f- 
4; pistil, f. 5; stamen, f. 6; fruiting hypanthium and calyx, f. 7. 
Caudex closely cespitose from a deep perennial root, densely covered with remains 
of old leaves. Stem scapose, 4-7 em. long, finely glandular-puberulent and sometimes 
with a few longer hairs. Basal leaves very numerous, 2-5 cm. long, finely glandular- 
puberulent with numerous, minute, very densely crowded and imbricated leaflets, which 
are 1-2 mm. long, divided to the base into oblong or oval, thick segments, tipped with a 
bristle. Cyme subcapitate, or in age somewhat corymbose. Hypanthium about 4 mm. 
in diameter, saucer-shaped, glandular-hirsute ; bractlets oblong, about two-thirds as long 
as the broadly ovate sepals. Petals obovate, a little exceeding the sepals. 
H. pygmaea much resembles the first variety of the preceding species, but is easily 
distinguished by the bristle-points at the ends of the segments of the leaves, by the larger 
and shallower flower, generally 10 stamens and more numerous pistils. It grows on the 
higher mountains of the Sierra Nevada. 
California: C. F. Sonne, No. 84, 1885; G, P. Rixford ; Gustav Eisen, 1885; T. 8. 
Brandegee, 1892; Coville & Funston, No. 1664, 1891; Vernon Bailey, No. 2064, 1891. 
Nevada: W.H. Brewer, No. 2812, 1864 (type). 
45. Horkelia Shockleyi (Wats.). 
Ivesia Shockleyi Wats. Proc. Am. Acad. 28: 263. 1888. 
Potentilla decipiens Greene, Pittonia, 1: 106. 1887. Excluding synonyms. Not 
Jordan. 
Greene, Fl. Fran. 1: 69. 
Potentilla nubigena Greene, Erythea, 3: 36. 1895. 
InLusTRATIONS: Pate 93, f. 8; leaflets, f. 9; stipules, f 10; dissection of flower, 
f. 11; pistil, f. 12; stamen, f. 13; fruiting hypanthium and calyx, f. 14. 
Caudex densely cespitose from a deep woody root, covered with the remains of old 
leaves. Stem subscapose, densely glandular, 2-5 cm. high. Basal leaves very numerous, 
2-4 em. long, densely glandular, pinnate, with about a dozen pairs of minute leaflets, 
which are 2-3 mm. long, crowded, cleft to the base into several obovate thick segments 
mostly tipped with bristles. Inflorescence open, strictly cymose and with diverging 
branches. Hypanthium about 3 mm. in diameter, saucer-shaped, densely glandular and 
in age decidedly 5-angled; bractlets ovate, about half the length of the broadly ovate 
sepals. Petals spatulate, white (?), about equalling the sepals. 
This species has been confused with H. pygmaca, which it much resembles in habit, 
