1899 } NEW SPECIES OF WESTERN PLANTS 447 
_ This genus is related to Potentilla and Chamzrhodos. From Potentilla 
it differs in having a long calyx tube and no bractlets, and from Chamerodos 
inits terminal style and the position of the stamens, and it is distinct from 
both in its peculiar stipitate receptacle. 
Purpusia saxosa, n. sp.—Perennial from a stout root, 10-15™ 
high, hirsute and somewhat viscid: basal leaves numerous, pin- 
nate; leaflets two or three pairs, the lowest pair on pedicels 5™™ 
long, irregularly oblong or orbicular, 10-15™™ in diameter, more 
or less deeply cut into five to ten rounded entire or incised lobes ; 
stem leaves similar, becoming simple and bract-like above, their 
stipules 7™™ long, ovate-acuminate, entire or incised: stem 
branched above, bearing solitary flowers in the axils of the 
leaves, forming a leafy paniculate cyme: flowers on pedicels 
I-2™ long, exceeding the bracts: calyx tube 3™™ long, indis- 
tinctly ten-ribbed ; lobes 4™™ long, lanceolate-acuminate : petals 
white, 4™™ long, 1™™ wide, slightly acuminate, inserted, opposite 
the sinuses: anthers 1™™ long, equaling the filaments : recepta- 
cle hirsute, no broader than the gynophore, which is 2™™ long, 
pubescent and narrowly cylindrical : styles 2™™ long: akenes 
smooth. 
Sheep mountains, Nevada, at 4000-5000 feet altitude, De C, 
A. Purpus, no. 6134. 
CHAM#BATIA FOLIOLOSA Benth. var. australis, n. var.—Much 
less glandular-pubescent than the type: leaves narrower in out- 
line, three times as long as wide and barely more than twice 
pinnate : calyx lobes shorter: ovary smooth. 
La Grulla, Lower California, C. R. Orcutt in 1886; Mt. 
San Miguel near San Diego, D. Cleveland ; and reported by 
Mr. Orcutt from Point Loma near the ocean. 
Typical C. folio/osa is more northern in its range and grows’at consider- 
able altitudes in the Sierra Nevada, so that it is somewhat surprising to find 
a form so far south and near the sea level. 
Boykinia Purpusi, n. sp.—Slender and smooth except the 
upper part of the glandular stem, 20-25°" high: leaves round- 
feniform, the largest 4° wide, with five to seven acutely incised 
lobes ; petioles 6—7°™ long or less, with ramentaceous bristles at 
