VoL. 5] New Species of Mexican Plants. 233 
racemes numerous, 2-4 cm, long, densely flowered: flowers on 
pedicels 2-3 mm. long: sepals ovate, less than 1 mm. long: 
petals shorter, very narrowly linear-spatulate, white: stamens 2, 
shorter than the petals: capsule 2 mm. long and nearly as wide, 
slightly winged at apex and minutely notched: cotyledons in- 
cumbent. 
The specimens are very mature, and most of the leaves have 
fallen. A few young branches still retain some belated flowers. 
The plants seem to perish after having matured their fruit and to 
be winter annuals or biennials, Collected on Popocatepetl, grow- 
ing in gravelly soil about timber-line. No. 1649. 
Cardamine macrocarpa. Annual, glabrous, stems erect, 
rarely branched, slightly wing-angled, about 1 dm. high: cauline 
leaves 5-7 cm.’ and less long, 5-7 foliolate; leaflets oblong, deeply 
parted into 5-7 mucronate lobes; radical leaves similar, with 
larger, less deeply parted leaflets: fruiting raceme 3 the height 
of the plant: petals greenish white, 1 mm. wide, 5 mm. long, 
exceeding the calyx lobes: pods erect, 3-4 cm. long, 1.5 mm. wide, 
acuminate, slightly stipitate: pedicels 5-8 mm. long; cotyledons 
accumbent. 
Collected on Sierra de Parras, Coahuila, March, 1905. No. 1029. 
Lesquerella flexuosa. 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, ro-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 
4mm. 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. 
Collected on Sierra de Parras, Coahuila. No. 1330. 
Cassia fulva. 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 
Imm. long, ovate-oblong, rounded at the top, slightly cuneate 
