388 CONTRIBUTIONS FROM THE NATIONAL HERBARIUM. 
2. Selinocarpus palmeri Hemsl. Biol. Centr. Am. 3:6, 1882, 
The leaves of this plant are much like those of S, angustifolius, but are 
covered with a close, appressed, whitish pubescence; young branches glabrous; 
flowers funnelform, the perianth about 15 mm. long and 11 mm. wide, gradu- 
ally widening from the base upward; stamens much exserted: leaves on the 
young branches linear, thick, 25 mm. long. 
Specimens examined: 
Mexico: San Lorenzo de Laguna, Coahuila, 1880, Palmer 1119. 
3. Selinocarpus parvifolius (Torr.) Standley. 
Selinocarpus diffusus parvifolius Torr. Bot. Mex. Bound. 168. 1858, 
Specimens examined: 
Texas: Presidio del Norte, Mexican Boundary Survey 1105, type collection ; 
Presidio, 1881, Havard; Bone Spring, and Tornillo Creek, 1883, Havard. 
4. Selinocarpus diffusus A. Gray, Am. Journ. Sei. II. 15: 262, 1852. 
Specimens examined: 
Texas: Rock hills from the Pecos to the Limpio, Wright 1708, type col- 
lection; 5 miles east of Estelline, 1904, Reverchon 283; Estelline, 
19038, Reverchon 3685; Big Springs, 1902, Tracy 8313. 
New Mexico: Delaware Creek, 1893, Nealley 10; south of Carrizozo, 1904, 
Wooton 2821; Acoma, 1884, Lemmon, 
The flowers of this species are often cleistogamous, but on specimens of the 
species proper fully developed flowers can almost always be found. 
4a. Selinocarpus diffusus nevadensis Standley, subsp. nov, 
Leaves ovate, 15 to 18 mm. long and about 13 mm. wide, broadly obtuse, 
often mucronate, rounded or truncate at the base, their margins entire and 
smooth, the blades thickish, puberulent or often glabrous above: flowers all 
cleistogamous, 
This form differs from the species in its broader and more obtuse leaves 
with entire margins; the leaves are also a bright yellowish-green in color; the 
flowers seem to be always precociously fertilized. ‘The plant is readily dis- 
tinguished by its general appearance and is probably a good species, but the 
differences are difficult of definition. 
Type U. S. National Herbarium no, 23012, collected at Overton, Lincoln 
County, Nevada, 1891, Vernon Bailey 1932. 
Other specimens cramined: 
NeEvaDA: Muddy Valley, 1906, Kennedy & Goodding 5; Moapa, 1905, Hen- 
nedy 1085, 
UtTan: Southern Utah, 1876, G. E. Johnsen: southern Utah, 1877, Palmer 
402; southern Utah, 1874, Parry 213. 
5. Selinocarpus angustifolius Torr. Bot. Mex. Bound. 170. 1858. 
Specimens examined: 
Texas: Mexican Boundary Survey 1129, type collection; Chenate Moun- 
tains, 1899, Nealley 457. 
Mexico: Viesca, Coahuila, 1905, Purpus 1054; Mesillas near Saltillo, 1848, 
Gregg 535. 
6. Selinocarpus chenopodioides A..Gray, Am. Journ. Sci. II. 15: 262. 1853. 
Specimens examined: 
TEXAS: Gravelly hills, El Paso, ete., Wright 1707, type collection; El Paso, 
1881, Vasey; El Paso, 1885, Pringle; El Paso, 1884, Jones 4214: Chenate 
Mountains, 1889, Nealley 458; J. Davis’s Ranch, 1883, Havard. 
