91 
longer than the calyx; petioles and midrib of the under sides of some 
of the leaves showing a slight pubescence under the microscope; 
fruit ovoid-ovate or elliptic in outline, z'~A^ l^'^g ^^^ about 3" 
broad. 
A shrub or small tree. Smaller branches with dark reddish 
brown bark, rigid and sub-spinose, the leafy and fruit-bearing spines 
x-Z long, ^ 
Mountains near the lower crossing of the Pecos River on the road 
from Fort Stockton to old Fort Lancaster and the head of Devil's 
River. 
BuMELiA MONTTCOLA. — Very spiuose; leaves smooth on both 
sideSj a little paler beneath, oblong-ovate, cuneate at the base, peti- 
olate, I'-i-g-' long and ^-^ wide, their under surface reticulately 
veined; petioles z^^' loi^gi about equal in length to the pedicels; 
calyx broad ovate, acute or sub-acute, smooth; fruit globose, the 
longitudinal diameter a little the greater, being about 3" long; 
spines \~2 long, often bearing leaves and fruit; smaller branches 
smooth, greyish browm, forming obtuse angles opposite their junction 
with the spines, with generally a warty protuberance at the base of 
each spine; flowers not seen. 
A straggling shrub 3-9 feet high, with smooth reddish brown 
bark, Moutains of El Paso County, N. W. Texas. 
\ Quercns Durandii, var. San Saeta.— This is a small oak seldom 
more than ten feet high, generally only from four to six feet, growing 
in dense thickets on some of the limestone hills of San Saba and its 
adjacent counties, Texas. 
It has small, obtusely lobed leaves, which, when old, are nearly of 
the same color and smooth on both sides; when young, glaucous and 
sub-pubescent beneath; acorn oblong-ovoid, cup shallow, one-third 
the length of the acorn. Bark of trunk and branches light grey and 
scaly. Called " shin oak." Bark, acorns and cups very much like 
those of Q, Durandii, and so much so that it can only be considered 
as a well marked variety of it. 
It has been called by Engelmann a variety of Q. uiidulata, and is 
placed thereunder in Prof. Sargent's Synopsis of the Trees of North 
America, and, in the same work, on the same authority, Q. Diirandii is 
called a variety of Q. stellata; but these authorities now admit Q. 
Durandii to be a good species. 
QuERcus Vaseyana. — Leaves apparently deciduous, with shal- 
,low, repand, acutely toothed lobes and sub-mucronate teeth, smooth 
on both sides, or slightly downy and paler beneath, mostly cuneate 
at the base, rarely rounded, lanceolate or lance-ovate, petiolate, 
i'-2' long and f-i,' wide; petioles i' -2" long; acorns oblong-ovoid, 
smooth, shining and of a pale chestnut color, 6' -7'' long and about 
4 'wide; cups sessile, their greyish-brown scales tumid, triangular 
ovate, acute. 
A shrub or small tree of the class of black oaks. On the mesas 
of the cretaceous limestone mountains near the lower crossing of the 
Pecos, and also in the valley of the Devil's River of Western Texas. 
Named in honor of Dr. Vasey, botanist of the Agricultural De- 
partment at Washington, D. C. 
X 
