320 ON THE SYNONYMY OF VARIOUS CONIFERS. 
1863.— Undescribed Species—ABIES BIFOLIA. 
There is another undescribed species somewhat resembling the last in its 
mature leaves, although not in the cone. It forms part of the collection 
recently made by Dr. Lyall on the Rocky Mountains, which is now in the 
museum at Kew. This species also has been supposed to be the amabilis 
of Douglas. I propose to call it bifolia, from its leaves being of a different 
shape on the old and young shoots. It may be said that this name is objec- 
tionable, because the last species and several others are equally entitled to it, 
as they too bear leaves of different forms at the same or different stages; but 
the same objection would wipe out half of our specific names. Hacelsa, 
pectinata, grandis, bracteata, balsamea, macrocarpa, microcarpa, and a host 
of others, might be with equal truth applied to many species. It is in such 
cases sufficient that the character from which the name is taken is very 
marked and one likely to attract notice; therefore we are not on that account 
deterred from giving the present species the name of bifolia. In it the leaves 
on the body of the branch are very sharp-pointed, while those at the end of 
the shoots are rounded ; in other words, the leaves are rounded when they 
first appear, but as they become older the tip of the leaf grows forward into 
а point; this must be the case, although in the specimens at Kew we have 
not seen any passage between them. Figs. 34 and 34a show the leaf of 
the young shoots slightly pedunculated and twisted at the base. Figs. 
35, 35а, and 356 show it as on the body of the branch, pointed and 
JJ 
Fig. 34.—Leaf Fig. 34a.— Leaf Fig. 35.—Leaf Fig, 85a.—Leaf Fig. 35b. — Side 
from body of 
‹ 1 
from shoots from shoots of of A. bifolia view of poi t of 
> - * . г íi E 
n bi- А. bifolia mag- from body of branch ae fig. 3 
olia. nified twice. bran nified twice. 
without any but the very slightest trace of twisting at the base. There 
are stomata both on the upper and under side of the leaf; disposed 
Somewhat in rows and more interrupted and irregular оп the upper than 
Wan ; the number of rows varying from three to four or five (figs- 
99, 96a, 30b, and 360) The leaves are packed very closely together, 
Fig. 36.—Upper side Fig. 36¢.—Under i 4 
‚ 3ба.— Fig. 366.— ig. 36. —Undet sit? 
of sens gon shoots віде of fig, 36. miss of Sepe a po 36b. 
magn ї body of branch 
magnified, 
