154 MEMOIRS FROM THE DEPARTMENT OF BOTANY OF COLUMBIA UNIVERSITY 
and especially in the leaves, which also have the bristle-points. It differs mainly in the 
more open, purely cymose inflorescence and smaller and more decidedly angular flowers. 
The range and habitat are about the same as those of the preceding. 
California: W. H. Shockley, No. 466, 1864 (type); No. 84, 1887; J. G. Lemmon, 
1873 ; 1875; Coville & Funston, No. 1800, 1891 ; C. F. Sonne. 
§11. SAXOSAE. 
46. Horkelia Baileyi (Wats.). 
Tvesia Baileyi Wats. King’s Rep. 5: 90 and 449. 1871. 
Brewer & Wats. Bot. Cal. 1: 184; Howell, Fl. N. W. Am. 1: 181. 
Potentilla Baileyi Greene, Pittonia, 1: 105. 1887. 
InLusTRATIONS: PLATE 94, f. 1; dissection of flower, f. 2; flower seen from above, 
jf. 3; pistil, f. 4; stamen, f. 5; fruiting hypanthium and calyx, f. 6. 
Caudex somewhat cespitose from a more slender root. Stems several, decumbent 
or ascending, 1-3 dm. long, finely pubescent or glabrate, somewhat leafy. Stipules ob- 
ovate, entire, about .5 em. long. Basal leaves many, 1-2 dm. long, pinnate ; leaflets 4-6 
rather distant pairs, finely pubescent or glabrate, .5-1 cm. long, thin, obovate or orbicular, 
generally oblique, deeply incised into rounded obovate segments. Stem leaves smaller 
with 2-3 pairs. Inflorescence rather open and truly cymose, with slender pedicels. 
Hypanthium 4-5 mm. broad, slightly glandular-villous, saucer-shaped, in fruit evidently 
5-angled; bractlets linear-oblong, one-third to two-thirds the length of the broadly ovate 
sepals. Petals yellow, spatulate, shorter than the sepals. Stamens 5 with short fila- 
ments, which incline toward the 4 to 8 pistils. 
In the flowers and inflorescence, H. Baileyi much resembles the preceding, but the 
leaves have much fewer and larger leaflets, which are not at all imbricated. The leaves in 
this and the next species do not suggest a Horkelia-Ivesia at all, but the following variety 
with bristle-pointed leaf-segments approaches H. Shockleyi. Specimens : 
Nevada: W. W. Bailey (King’s Exp.), No. 346, 1867 (type). 
Oregon: W. C. Cusick, No. 1256, 1885; Thos. Howell, No. 594, 1885. 
Horkelia Baileyi setosa (Wats.). 
Tvesia Baileyi var. setosa Wats. King’s Exp. 5:91. 1871. 
3rewer & Wats. Bot. Calif. 1: 184. 
IuLustRATIon: Pats 94, f. 7, leaf. 
Leaves more deeply dissected into narrower, generally bristle-pointed segments. 
Nevada: 8. Watson, No. 347, 1868 (type): M. E. Jones, No. 3850, 1882; 1898. 
