STANDLEY—TROPICAL AMERICAN PHANEROGAMS. 215 
Type in the U. 8. National Herbarium, no. 229315, eollected between San 
Ger6énimo and La Venta, Oaxaca, Mexico, altitude 60 meters, July 13, 1895, 
by E. W. Nelson (no. 2784). 
The following additional collections belong here: 
SinaLoa: Between Rosario and Acaponeta, Rose 1870. Guadalupe, Rose, 
Standley & Russell 14748. Near Colomas, Rose 3241. 
JaLisco: Jayamita, Jones 164. 
Closely related, apparently, to C. glabrata H. B. K., a plant of Peru and 
Colombia, with glabrous calyx and smaller leaflets. C. vesicaria L., known in 
Mexico only from Yucatan, is a similar plant, but it has very large, coriaceous 
leaflets of different shape. 
Cassia chiapensis Standl., sp. nov. 
Erect shrub, the branches stout, terete, very densely pilose with grayish 
or fulyous hairs; stipules Jance-linear, 11 to 15 mm. long, attenuate, deciduous, 
pilose outside; petioles 1.5 to 3.5 cm. long, the rachis 4 to 7 cm. long, densely 
pilose, a slender clavate gland usually present between each pair of leaflets; 
leaflets 3 to 6 pairs, oval, oblong-oval, or ovate-oval, 2 to 4 cm. long, 1.2 to 2.5 
em, long, petiolulate, rounded and subequal at the base, rounded at the apex, 
chartaceous, green on the upper surface, glabrous, the venation rather con- 
spicuous, densely pilose beneath with slender whitish subappressed hairs; 
flowers racemose, the racemes many-flowered, dense, 4.5 to 10 em, long, borne 
on a stout pilose peduncle 4 to 8 cm. long, the pedicels 6 to 13 mm, long, the 
bracts short, lance-linear, caducous; outer sepals oval, 3.5 mm. long, sparsely 
short-pilose, green, the inner ones rounded-obovate, 5 mm. long, yellowish, 
ciliate; petals 5 to 7 mm. long, spatulate-obovate, short-clawed, glabrous, pale 
yellow, conspicuously veined ; stamens 10, 3 of them abortive, 3 of them with 
stout anthers 3.5 mm. long, the other 4 with anthers 2.5 mm. long, the anthers 
erostrate, opening by apical pores; ovary densely pilose; fruit about 5 cm. 
long and 7 mm. wide, very acute and stipitate at the base, obtuse or acutish 
and short-rostrate at the apex, glabrous at maturity, the valves thin, flat, the 
seeds transverse-oblique. 
Type in the U. S. National Herbarium, no. 470740, collected at Teopisca, 
Chiapas, Mexico, May 7, 1904, by E. A. Goldman (no, 989). Also collected 
between San Cristébal and Teopisca, Chiapas, altitude 2,000 to 2,550 meters, 
December 4, 1895, by E. W. Nelson (no. 3481a). 
This plant belongs to Bentham’s section Chamaesenna, and apparently to 
the series Pachycarpae, but it is not closely related to any of the species re- 
ferred there by that author. The small flowers are the most prominent 
character. 
Cassia tonduzii Standl., sp. nov. 
Tree or large shrub, the branches slender, striate-angulate, fulvous-puberu- 
lent; stipules subulate, deciduous; petioles 1.5 to 2 cm. long, the rachis 5 to 
10 cm. long, sparsely puberulent, usually with a long slender clavate gland 
between each pair of leaflets; leaflets 4 to 6 pairs, short-petiolulate, elliptic 
to narrowly lance-elliptic, 2 to 9 cm. long, 1 to 2.8 cm. wide, rounded to sub- 
acute at the base, acuminate or abruptly acuminate at the apex, rarely only 
acute, membranaceous, green on the upper surface, sublustrous, glabrous or 
very minutely puberulent, the venation mostly impressed, scarcely paler be- 
neath, thinly strigillose with slender, grayish or yellowish hairs, the costa and 
lateral nerves slender but very prominent, the margin plane or revolute ; 
flowers in 2 or few-flowered axillary racemes borne on slender peduncles, very 
numerous, the pedicels long and slender, puberulent ; sepals orbicular, the outer 
98523—19—4 
