ZOE 
VOL, V. APRIL, 1904. No. 10 
A COLLECTION OF MEXICAN PLANTS. 
T. S. BRANDEGEE. 
Dr. C. A. Purpus, whois gathering cacti and orchids in Mexico, 
has made a most interesting collection during the past year, 
mainly from Ixtaccihuatl, a very high mountain not far distant 
from the City of Mexico, 
A comparison, in Biologia Centrali-Americana, of the mountain 
floras of Mexico makes no mention of that of Ixtaccihuatl, and 
it seems as if this collection might be the first one from that 
locality, Most of the plants collected are known from other 
parts of Mexico, and many of them have been previously ob- 
tained by Mr. C, G. Pringle on Nevada de Toluca, but a number 
of undescribed forms were found. ‘The plants from the high 
alpine region are especially interesting and a great number of 
them belong to genera growing upon the mountains of the “United 
States of the North.” MMontia fontana and Sagina Linnei seem 
to be identical with the northern plants. Ranunculus is repre- 
. sented by R&R. sibbaldioides and Donnianus—there are several 
species of Cerastium that seem to have been very abundant. Po- 
tentilla is represented by species rarely collected: P. ranuncul- 
oides, candicans, Richardit and comarotdes. Arenaria, Draba, 
Viola are well represented, and many other common northern 
genera were collected. 
Many thanks are due Dr. J. M. Greenmann for determinations 
of doubtful species. 
Thelypodium Mexicanum. Perennial, glabrous and glaucous, 
the leafy stems ascending 4-5 dm. high; larger leaves 10-12 cm. 
long, 2-3 cm, wide, spatulate, entire, acuminate, thin in texture, 
APRIL 18, 1904 
