MEMOIRS FROM THE DEPARTMENT OF BOTANY OF COLUMBIA UNIVERSITY 55 
1: 64; Coville, Cont. U. S. Nat. Herb. 4: 96; Brandegee, Zoe, 4: 205, 1893; Rothrock, 
Wheeler Surv. 4: 360; Rydb. Bull. Torr. Bot. Club, 23: 429. 
InLustratTions: Rothrock, Wheeler Surv. p/. 3, f. B. Puatre 16, f. 1; dissection of 
flower, f. 2; pistil, f. 3; stamen, f. 4; fruiting hypanthium and calyx, f 5. 
Stems many from the caudex, 5-10 em. long, spreading or decumbent, branched and 
many-flowered, silky-villous. Stipules ovate, acute, subentire. Basal leaves many with 
petioles 2-6 em. long, digitate, of 5 leaflets, equally silky or hirsute-villous on both sides; 
leaflets cuneate to obovate, crenate at the rounded summit, 1-1.5 em. long. Stem leaves 
smaller and often ternate. Hypanthium silky-villous, in fruit 5-7 mm. in diameter. 
Bractlets oblong, obtuse, a little shorter than the ovate, rather acutish sepals. Petals ob- 
cordate, a little exceeding the calyx. Stamens 20. Pistils about 20. Style filiform. 
The pubescence is quite densely silky, and the typical form is apparently without 
glands. The petals are obcordate, slightly contracted at the base, and a little exceed the 
calyx. It has been collected in southern California, Arizona and northern Mexico. The 
following specimens have been examined : 
California: Rothrock, No. 324, 1875; Parry & Lemmon, No. 100, 1876; Coville 
& Funston, No. 1672, 1891; in part; S. B. Parish, No. 1498, 1882; No. 2363, 1892; No. 
3146, 1894. 
Lower California: T. S. Brandegee, 1893. 
Potentilla Wheeleri viscidula Rydberg. 
Potentilla Wheeleri Coville, Cont. Nat. Herb. 4: 96. In part. 1898. 
Potentilla Wheeleri viscidula Rydberg, Bull. Torr. Bot. Club, 28: 429. 1896. 
Subcespitose, rather hirsute with spreading hairs, somewhat glandular-granuliferous 
on the calyx, pedicels, etc.; leaflets shorter and broader, generally less than 1 em. long. 
The following specimens have been seen by me: 
Arizona: C. G. Pringle, 1881; J. G. Lemmon, No. 158, 1881. 
California: W. G. Wright, 1879; Coville & Funston, No. 1672, 1891, in part. 
Pringle labelled his specimens Potentilla subviscosa Greene (near P. Wheeler’ Wats.). 
I think, however, that they should be referred to P. Wheeleri rather than to P. subviscosa, 
as they do not have the dissected leaves and the subunguiculate petals of P. subviscosa. 
30. Potentilla subviscosa Greene. 
Potentilla subviscosa Greene, Bull. Torr. Bot. Club, 8: 97. 1881. 
Rydb. Bull. Torr. Bot. Club, 23 : 430. 
