MEMOIRS PEOM THE DEPARTMENT OF BOTANY OP COLUMBIA UNIVERSITY 153 



Eattan, An. Key W. Coast Bot. 52. 



Potentilla decipiens Greene, Pittonia, 1: 106. As to synonyms. 1887. Not Jordan. 



Illustrations: Plate 93, f. 1; leaflets, /. 2; stipules, /. 3; dissection of flower, /. 

 4; pistil, /. 5; stamen, /. 6 ; fruiting hypanthium and calyx, /. 7. 



Caudex closely cespitose from a deep perennial root, densely covered with remains 

 of old leaves. Stem scapose, 4-7 cm. long, finely glandular-puberulent and sometimes 

 with a few longer hairs. Basal leaves very numerous, 2-5 cm. long, finely glandular- 

 puberulent vdth 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. S. 

 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. 23 : 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. 



Illustrations: Plate 95,/. 5; leaflets,/. 5; stipules, / iO ; .dissection of flower, 

 / 11; pistil,/ IS; stamen,/ 13; fruiting hypanthium and calyx, / I4. 



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 cm. 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. pygmaea, which it much resembles in habit, 



