800 . 
MONOECIA TRIANDRIA. 
With this species I am personally unacquainted. A single leaf, however, 
which was sent me under this name by Dr. Muhlenberg, agrees minutely 
with the description of Wildenow, and certainly belongs to no variety of the 
Q. Aqautica or Q. Laurifolia that I have seen. It resembles the leaves of 
the Q. Ilicifolia more nearly than those of any species that I possess; but 
differs from that by being more distinctly 3-lobed at the summit, by being 
glabrous underneath except in the axils of the large leaves. Leaves between 
2 and 3 inches long, deeply 3-lobed and mucronate at the summit, obtusely 
sinuate near the base. 
Grows in the pine barrens of Carolina and Georgia, Pursh. 
Flowers. 
11. Nigra. 
Leaves coriaceous, 
wedge shaped, slightly 
cordate at base, dilated 
at the summit, retusely 
3-lobed, when young 
mucronate, glabrous on 
the upper surface, rus- 
ty and pulverulent un- 
derneath, nut short, 
ovate. 
Sp. pi. 4. p. 442. Wait. p. 234. Mich. 2. p. 198. Prush, 2. p. 629 
Nutt. 2. p. 214. 
Icon, Mich. Querc. t. 22, 23. Mich. arb. for. 2. p. 92. 
A small tree 20 — 25 feet high, rarely exceeding 10 inches in diameter, 
irregular in its growth, and covered with a thick rough black bark. Leaves 
on short petioles 5 — 7 inches long, obovate, dilated at the summit, obscurely 
3-lobed, glabrous on the upper surface, covered underneath with a ferrugin- 
ous dust. Nut short, ovate, mucronate, not abundant. Cup rather deep, 
sessile. 
The wood of this tree is of little or no value as timber, but it is much es- 
teemed for fuel. It is universally known by the name of Black Jack, while 
the name of Black Oak is as generally given to another species. It varies 
with the lobes, sometimes obsolete unarmed, sometimes very distinct and 
mucronate. 
Grows on the poorest sand hills, and always indicates a dry barren soil. 
Flowers March, April. 
Q. foliis coriaceis, 
cuneiformibus, basi 
subcordatis, apice dila- 
tatis, retuso-subtrilo- 
bis, junioribus mucro- 
natis, supra glabris, 
subtus rubiginoso-pul- 
verulentis; glande bre- 
vi-ovata. 
