BOTANY. 161 
Malvaltrum coccineum, Gray, PI. Fendl. p. 21. Everywhere between the Rio G-rande and 
the Colorado; March, April. 
SPHiERALCEA hastulata, Gray, PI. Wright. 1, p. 17. On the Pecos and Colorado. 
SPHiBRAiiCEA angustifolia, Spach; the small flowered variety, S. stellata, Torr. Pecos to 
Llano Estacado; March. 
SPHiERALCEA Fendleri, Gray, PI. Wright. 1, p. 21. Cotton-wood Springs, New Mexico. 
Fruit only, without foliage. 
GERANIACEiE. 
Geranium Carolinianum, Linn. From Llano Estacado to Colorado, &c. 
Erodium Texanum, Gray, PI. Lindh. 2, p. 157; and Gen. III. t. 151. From the Pecos to 
the Colorado; March and April. 
OXALIDACEiE. 
Oxalis Wrightii, Gray, PI. Wright. 1, p. 27. On the Pecos; March. 
LINACEAE. 
Linum rigidum, Pursli, FI. 1, p. 210. On the Pecos, Llano Estacado, and upper Colorado ; 
March, April. 
Linum multicaule, Hook, in Torr. and Gray, FI. 1 , p. 678. Llano Estacado; April; Mr. 
Garrard. 
Linum perenne, Linn. From New Mexico to the Colorado ; March, April. 
ZYGOPHYLLACEiE. 
Larrea Mexicana, Moricand; Torr. in Emory’s Pep. p. 137, t. 3. From the Rio Grande to 
Llano Estacado, &c. Not yet in flower. 
RUT ACE.®. 
Zanthoxylum Carolinianum, Lam.; Torr. and Gray, FI. 1, p. 214. Western Texas; April. 
The variety characterized in PI. Wright, t. p. 31. 
Rutosma Texanum, Gray, Gen. III. 2, p. 144, t. 155 ? On the Pecos, &c.; March. 
*** Captain Pope collected, on the Organ mountains, specimens, without flowers or fruit, of 
a remarkable Rutaceous plant, which had been previously gathered there by Mr. Wright, and 
afterwards by H. B. Gray, Esq. We have also received it from Dr. Edwards, of the United 
States army, who found it on the Mimbres. Dr. J. M. Bigelow and Mr. Schott were so fortu¬ 
nate as to detect it in fruit, while they were engaged in the Mexican boundary survey, under 
the command of Major W. H. Emory. The former gentleman collected it, in 1852, on the 
Florence mountains, which, we believe, are in the southern part of New Mexico, near the Rio 
Grande ; and Mr. Schott obtained it farther down the river. For want of the flowers, a com¬ 
plete description of the plant cannot he given; but there are sufficient materials to show that it 
is quite a distinct genus, of which a full account will he given in Dr. Torrey’s botany of the 
Mexican boundary survey, under the name of Astrophyllum dumosum. The plant is a low, 
much branched shrub, with opposite, palmately 7-10-foliolate, petiolate leaves; the leaflets 
narrowly linear, coriaceous, marked (as are the petioles and younger branches) with large and 
prominent glands. These glands on the leaflets are somewhat distant, and form a row along 
each margin. They are filled with a strong-smelling, acrid, volatile oil. The flowers are her¬ 
maphrodite, solitary, on long pedicels, which are lateral and terminal. On one of the specimens 
was a flower-hud, and on the other specimens were several pedicels supporting unfructified ova¬ 
ries, besides abundance of ripe fruit. The bud contained ten stamens in two series, with subu- 
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