[sj 102 
lected by Dr. W. arrived here By the best condition, and. some have 
‘ already germinated, so. that we may hope to raise some of these species. 
“Yueca aloéfolia, of the apathent United States and Mexico, is said also to 
bear an edible fruit, but has serrulate leaves; we have, therefore, different 
species of Tee with edible fruits, which may constitute a peculiar sec- 
tion in this gen 
The soil aveearea to be too fertile here for the production of Cacti ; and 
with'the exception of some Opuntiae, the only copie collected eben 
Paso and Chihuahua, about 100 miles south of the former place, was Cereus 
Greggii?*, which was peculiarly interesting, as it is probably the most 
a Rid form of Cereus proper. ‘The specimens sent for cultivation by 
t¥ 
flower nor fruit had been obtained; but Dr. Gregg has collected the same 
species near Cadena, south of Chihuabua, i in flower, from which I com- 
pleted the description. I could not have given it a more appropriate name 
than that of the zealous and intelligent explorer of those far off regrons. 
learn from Prince Salm-Dyck that a Cereus, probably the same species, 
was sent to England by Mr. Potts, of Chihuahua, but his specimens also 
om not live; they were very remarkable for having a thick turnip-shaped 
either Dr. W. nor Dr, G. havin ng paid attention to the root, Tam 
eesti: to say whether their specimens agreed with those of Mr. Potts in 
this PRTG 
~ Dr. Wislizenus was forced to go from Chihuahua westward to Cosihui- 
Pecut However prejudicial this involuntary interruption of his journey 
may have been to the primary objects of his expedition, it appears that he 
could not have selected a more favorable field for botanical researches. 
Sines the porphyry mountains of Cosihuiriachi and Llanos, which 
y from 6,000 to 8,000 feet in height, and their deep chasm-like valleys, 
a ry many undescribed — of — were found; in fact akmost 
AYSEEsnE collected there appears to 
Among trees, I mention three species of pines, entirely different 
from those found farther pots but perhaps identical with some species 
from the Pacific coast. ‘The most. magnificent ofthese three is a species 
nearly related to Pinus ae and Pinus flerilis, which I name P. stro- 
ormiis.* * Its size and growth, its oleae as well as the shape of the 
sata. vesiaguce acutissimis, 6-9 sidial Bis care infants preidegan 
central fuss ae de flexo minuto; tubo floris Soh ek areolis 60-80 cinered- 
tube ty to 3 gaa caps interior sepals feddisty green, Nhs pale purple. 
_ Pinus strobiformis, n sp., squamis turionum ovatis acuminatis; va- 
ginis laxis, patulis, deciduis; foliis Biscicey filiformibus > supra_albo lineatis, 
carinatis, subtus convexis, margine tenuissime pei ace ; strobilis 
$, squamis. obtusis inermibus, demum rec 
est peaks about Cosihuiriachi. ‘The | largest pine in mele esioll 100 
eit anti = 
