266 CONTRIBUTIONS FROM THE NATIONAL HERBARIUM. 
2 to 38cm. long; racemes remarkably short, sessile; fruit short, only 3 to4 mm. wide; 
carpels mostly round-obovate, in some specimens longer and subpyriform, the 
prominent striae 5 only, ending in a more or less distinct low tubercle, the inter- 
vening spaces conspicuously reticulate. 
‘‘La Paz, Lower, California, 1890, Dr. Edw. Palmer, his no. 88 as in U.S. Herb. 
the type; but collected earlier—namely, in 1889—at San Juanico by Brandegee, and at 
the same place by Anthony in 1897. Also in 1897 it was collected at La Paz by Mr. 
Rose, no. 1311 as in U. 8. Herb.; but these specimens have longer and even acutish 
leatlets; but the peculiarly reticulate carpels are about the same in all and are far 
more like those of the Texan and original W. refracta than like those of W. palmeri; 
and Mr. Rose found himself unable to refer them to either species; his label bearing, 
in his hand, nothing but the name of the genus.” 
Wislizenia fruticosa Greene, Proc. Biol. Soc. Wash. 19: 131. 1906. 
Only known from a single collection in Lower California. 
Wislizenia palmeri Gray, Proc. Am. Acad. 8: 622. 1873. 
Only known from the region at the head of the Gulf of California. 
Wislizenia costellata Rose; Greene, Proc. Biol. Soc. Wash. 19: 132. 1906. 
“Growing parts minutely and sparsely scaberulous; whole herbage more than 
usually glaucous, the branches very leafy, somewhat tortuous; leaves and their peti- 
oles of about equal length; leaflets cuneate-obovate, obtuse, only 1.5 to 2 em. long; 
racemes subsessile, 1 to 1.5 dm. long; fruit only 3 mm. wide, the carpels at sum- 
mit almost as thick as long, truncate at both ends, marked longitudinally by 5 or 
6 ribs and many intervening closely compacted strive, the main ribs gradually thicker 
toward the summit, where each ends in a stout low tubercle. 
“Sonora, Mexico, between Nogales and Guaymas, June 4, 1897, J. N. Rose, no. 
I294: type specimens in the U. 8. National Herbarium. Easily distinet from W. re- 
fracta by the very short and thick strongly ribbed carpels, which are also truncate at 
the apex.”’ 
Wislizenia mamillata Rose; Greene, Proc. Biol. Soc. Wash, 19: 132. 1906. 
“Glabrous; leaves on slender petioles nearly as long as the leaflets, the latter also 
conspicuously petiolulate, the blade narrowly oblong, acutish, 2 to 3 em. long; fruiting 
raceme stout and elongated, 10 to 20 em. long, short-peduncled; fruit about 6.5 mm. 
wide, the carpels shuttlecock-shaped, coarsely and somewhat turgidly striate, not at 
all reticulate, somewhat constricted above the base, thence abruptly widening toa 
broad and strongly mamillate-tuberculate summit. 
‘““Guaymas, Sonora, Mexico, June, 1887, Edw. Palmer, no. 74; also by J. N. Rose 
at the same place, June, 1897, Dr. Palmer’s specimens having been distributed for 
W. palmeri; but in characters of fruit the plant is extremely different from IV. palmeri, 
and even the foliage is all trifoliolate, while in W. palmeri all the leaves are simple, 
or unifoliolate.’’ 
CAESALPINIACEAE. 
TWO NEW SPECIES OF CASSIA. 
In the last number of these studies I published four species of Cas- 
sia. Since then two additional species have been discovered and these 
are here described. 
Cassia articulata Rose, sp. nov. 
A shrub, two meters high, the young parts densely stellate-pubescent; leaflets 
usually 4 pairs, ovate, 1.5 to 3.5 em. long, acute or obtuse, densely stellate-pubescent 
