Plantae novae Mexicanae a ©, A. Purpus collectae. 315 
6. Lesquerella flexuosa T. S. Brandegee, l. c., p. 233. 
Stems from an indurated root, branched especially near the base, 
the lower parts and leaves sparingly pubescent with forked hairs: leaves 
on petioles 2—6 mm long, the larger ones ovate or oblong-elliptical, 
10—15 mm long, cuneate at base, entire or sinuate-dentate with one to 
several short teeth, smaller leaves entire, linear-oblong: flowers numerous 
along the upper flexuous part of the stems on pedicels 4 mm long: petals 
4 mm long, spatulate, twice as long as the ovate, white-margined sepals; 
filaments flattened, narrowed upwards: pod globose, glabrous, with minute 
stipe and style, 3—4 mm in diameter; nerve of the septum very indistinct. 
Mexico: Collected on Sierra de Parras, Coahuila. No. 1330. 
1. Cassia fulva T. S. Brandegee, l. c., p. 233. 
Fruticose, branching; old stems grayish brown; new growth densely 
brown-tomentose; leaves 5—6 cm long; petiole 1—2 cm long, pubescent; 
leaflets 4—5 pairs on petiolules 1 mm long, ovate-oblong, rounded at the 
top, slightly cuneate at base, white-tomentose beneath, yellowish and 
silky-hairy above, 12—15 mm long, 7—10 mm wide: flowers crowded at 
the ends of the branches in short, dense clusters; pedicels 5—10 mm 
long, densely brown-pubescent; calyx lobes 7 mm long, brown-pubescent; 
petals nearly equal in length, 1 cm long; staminodia 3; perfect stamens 7, 
anthers slightly hirsute; ovary pubescent; legume flattened, 8—9 cm long, 
12 mm wide, sparingly hirsute. 
This species is marked by the contrast between the white-tomentose 
lower face of the leaflets and the dark yellow-green of the upper face. 
Mexico: Collected at El Riego, near Tehuacan, Puebla. No. 1195. 
8. Cassia Purpusi T. S. Brandegee, l. c., p. 234. 
A-bush 1—2 m high, the younger growth slightly pubescent: leaflets 
1— 3 pairs, glabrous, oblong to orbicular, somewhat oblique, 10- 18 mm 
long, 8—12 mm wide, nearly sessile, sometimes slightly retuse and api- 
culate, coriaceous, bearing an elongated gland between the lowest pair: 
petioles 1 em long: stipules linear-setaceous: inflorescence paniculate 
terminating the main stem and short branches; peduncles 1—2 cm long; 
pedicels 5—10 mm long; buds nodding; flowers erect, 2,5 cm wide when 
expanded; sepals oblong 12 mm long, 3 mm wide, obtuse at the apex; 
petals yellow, narrowed to the base into a claw: perfect stamens 7,3 long 
and 4 short; ovary pubescent: legume 5 em ong, 12 mm wide, glabrous, 
mucronate, flattened, usually somewhat constricted between the seeds. 
Mexico: Collected near Calmalli, Baja California, by Dr. Purpus, 
1898, no. 107, and in fruit by E. A. Goldman at Rosarita, near San 
Andreas, B. C., Sept. 25, 1905, no. 7160. 
9. Harpalyce ferruginea T. S. Brandegee, |. c., p. 234. 
Fruticose, the young growth, calyx and leaves, excepting the upper 
face of the leaflets, ferruginous-pubescent and sprinkled with orange- 
colored particles; the older growth more or less covered with white lenti- 
cels: leaves 3—4 cm long on petioles 1—2 cm long; leaflets 2—3 pairs 
and a terminal one, the midnerve prominent on the lower face, the upper 
