ROSE—MEXICAN AND CENTRAL AMERICAN PLANTS. 271 
pubescent; racemes axillary, elongate, 12 to 40 cm. long; rachis flattened; flowers in 
clusters of threes; pedicels 4 to 6 mm. long; calyx lobes filiform; the two upper 
slightly united; corolla light purple; banner orbicular, obtuse, 12 to 14 mm. in diam- 
eter; keel obtuse; stamens 10, axillary, one free; ovary pubescent; style pubescent on 
the inner margin; legume linear, 5 to 7.5 cm. long, strigose. 
Collected by Dr. E. Palmer in grassy flats at the mouth of a ravine near Lodiego, 
Sinaloa, October 9 to 15, 1891 (no. 1619). 
Type U. 8. National Herbarium no. 305315. 
Cracca sericea (S. Wats.) Rose. 
Clitoria sericea S. Wats. Proc. Am. Acad. 22: 407. 1887. 
Cracca tenella (A. Gray) Rose. 
Tephrosia tenella A, Gray, Pl. Wright, 2: 36. 1853. 
THREE NEW SPECIES OF DIPHYSA. 
The genus Diphysa, a characteristic arid tropical genus, has a wide 
distribution in Mexico, but only a few species have been described. 
After a somewhat exhaustive study of the genus | wish to propose 
the three following species: 
Diphysa occidentalis Rose, sp. nov. 
Shrub or small tree, glabrous throughout; leaflets about 20, oblong, acute; inflo- 
rescence few-flowered, sometimes only 1 or 2-flowered; calyx glabrous, except the 
ciliate lobes; petals yellow; pods oblong, much inflated, 4 to 8 mm. long, subsessile. 
Specinens examined; 
Sonora: Guaymas, Dr. FE. Palmer, 1887 (no. 198, type). 
Colima: Manzanillo, Dr. E. Palmer, December 1 to 31, 1890 (no. 890); city of 
Colima, M. FE. Jones, July 2, 1892 (no. 177). 
Sinaloa: Culiacan, Dr. E. Palmer, August 27 to September 15, 1891 (no, 1498). 
Guerrero: Acapulco and vicinity, Dr. E. Palmer, October, 1894, to March, 1895 
(no. 106a), 
This species seems to have a wide range, extending down the west coast of Mexico 
from Guaymas to Acapulco. 
Type U.S. National Herbarium no. 40567. 
Diphysa minutifolia Rose, sp. nov. 
Shrub, 1 to 2 meters high; old branches either gray or cherry red; first year’s 
branches puberulent; leaves small, narrow, 2 to 6 cm. long; stipules linear, 2 to 3 
mm. long; leaflets numerous, sometimes as many as 40, small, 4 to 6 mm. long, 
oblong, obtuse, pubescent when young, glabrate in age; inflorescence much reduced, 
sometimes only 1 or 2-flowered; bractlets not seen, doubtless caducous; calyx 
slightly pubescent, perhaps becoming glabrate; ovary pubescent; pods 4 to 5 cm, 
long, inflated. 
Collected by C. G. Pringle in a barranca near Cuernavaca, Morelos, June 25, 1896 
(no. 6876, type), and near Yautepec, Morelos, by C. G. Pringle, May, 1904 (no. 
11963); also at the latter place by Rose and Painter, August, 1903 (no. 6568). 
Type U.S. National Herbarium no. 491996. 
This species is not near any other Mexican species. 
Diphysa echinata Rose, sp. noy. , 
Low shrub; young parts with some soft pubescent and many stiff yellow, almost 
prickly hairs; leaflets about 12, orbicular to oblong, 1.5 to 2 cm. long, very thin, 
glabrous above, very pale and puberulent beneath; racemes about 6-flowered; pedicels 
slender, 1 to 2em. long; bractletsat base of calyx ovate, 10 to 12 mm. long; calyx tube 
glabrous, the margin of the lobes ciliate; corolla yellow, 2 em, long; pods not seen. 
Collected by J. N. Rose between Rosario and Colomas, July 12, 1897 (no. 1603). 
Type U. 8. National Herbarium no, 300448. 
