37 
L. calycinum, was found in sandy soil on the Cimarron. This 
plant has, like the nearly allied 7. ¢eretifolium of the United 
States, a remarkable tenacity of life, so much so that specimens 
collected, pressed, and “dried,” in June, 1846, when they 
reached me in August, 1847, fourteen months later, grew 
vigorously after being planted. 
Psoralea hypogea, Nutt., was collected near Cold Spring, and 
Yucca angustifolia from here to Santa Fe. 
From Cedar creek the mountainous region commences with 
an elevation of near 5,000 feet above the Gulf, and extends to 
Santa Fe to about 7,000 feet. With the mountains we get also 
to the region of the pines and of the Cacti. Dr. Wislizenus has 
here collected two species of Pinus, both of which appear to be 
undescribed, so that I venture to give now a short account of 
them. The most interesting one, on account of its useful fruit, 
as well as its botanical associations, is the nut pine of New 
Mexico, (Pifion,) Pinus edulis, nearly related to the nut pine of 
north-eastern Mexico, Pinus osteosperma, (specimens of which 
were sent to me by Dr. Gregg, as collected on the battlefield of 
Buena Vista,) and to the nut pine of California, P. monopihyia, 
Torr. and Frem.—these three species being the western repre- 
sentatives of Pinus Pinea and Ceméra of the eastern continent. 
The second species, Pinus brachyptera, is the most common 
pine of New Mexico, and the most useful for timber. A third 
species, Pinus flexilis, James, was overlooked by Dr. Wislizenus, 
but has been collected in fine specimens, by Mr. Fendler, about 
Santa Fe. Its leaves in fives and pendulous cylindrical squarrose 
cones assimilate it to Pinus Strobus; but the seed is large and 
edible, as Dr. James has already remarked, and the leaves are 
not serrulate and much stouter. The Pifones, so much eaten 
in Santa Fe, appear principally to be the product of Pinus edulis. 
I shall have occasion to speak of three other pines when I come 
to the Flora of the mountains of Chihuahua. 
Linum perenne makes its first appearance here, and continues 
to Santa Fe, as well as the justly so called Lathyrus ornatus. 
Several species of Potentilla, Ginothera, Artemisia, and Pentste- 
mon were collected in this district. 
Among the most remarkable plants met with were the Cac- 
tacee. After having observed on the Arkansas, and northeast 
of it, nothing but an Opuntia, which probably is not different 
investigated the regions about Santa Fe during last season, (1847,) and has 
made most valuable and well preserved collections, some sets of which he offers 
for sale. I shall repeatedly be obliged to refer to him when speaking of the 
Flora of Santa Fe. 
