458 BOTANICAL GAZETTE [MAY 
to believe that this oak is a hybrid probably between Q. /yrata and 
Q. virginiana. The shape and texture of the leaves suggest the former, but 
they are thicker and more lustrous than those of Q./yrata. In these char- 
acters and in their pubescence they resemble those of Q. virginiana. The long- 
stalked fruit with the thin cup-scales has a general resemblance to the fruit 
of the live oak; from that of Q. /yrata it differs in the scales of the cup which 
are never thick at the base, in the shape of the cup pubescent on the inner 
surface, that of Q. /yrata being glabrous, and in the shape of the oblong-ovate 
nuts, which are never subglobose or short-ovate like those of Q. /yrata. The 
hybrid origin of Q. Comptonae is further borne out by the fact that H. NEss 
has raised artificially a hybrid oak between Q. /yrata and Q. virginiana, the 
fruit and the leaves of which, although smaller than those of the Mississippi 
trees, almost exactly resemble them in shape. 
I take much pleasure in naming this tree, which is one of the handsomest 
American oaks, for Miss C. C. Compton, of Natchez, who has worked industri- 
ously to make it possible for me to understand it, and who has greatly aided 
the Arboretum by gathering material of the woody plants of Adams County, 
Mississippi. 
/ Quercus Harbisonii, n. hyb. (Q. stellata var. Margaretta Xvir- 
giniana var. geminaia).—Leaves oblong-obovate to oblong, rounded 
at apex, gradually narrowed and cuneate at base, 3- or 5-lobed with 
acute or rounded apiculate lobes, or nearly entire with irregularly 
undulate margins and occasionally furnished with one or with 
two minute lobes below the middle; at maturity thick, bluish green, 
scabrate and lustrous on the upper surface, covered on the lower 
surface with loose pubescence, 6-7 cm. long and 2-4.5 cm. wide, 
with thickened slightly revolute margins, pubescent midribs and 
veins, and conspicuous reticulate veinlets. Flowers and spring 
leaves not seen. Nut oblong-ovate, gradually narrowed and 
rounded at apex, light chestnut brown and lustrous, about 2 cm. 
long, inclosed for one-third of its length in the turbinate cup 
covered with closely appressed hoary-tomentose scales, those near 
the base of the cup slightly thickened on the back. 
A tree 5-6 m. high, divided near the ground into two stems covered with 
rough gray bark, and slender reddish branchlets pubescent during their first 
season and dark reddish brown and nearly glabrous in their second year, and 
ovate obtuse winter buds covered with chestnut brown nearly glabrous scales. 
A single tree in sandy soil, Jacksonville, Florida, T. G. Harbison and C. S. 
Sargent, December 3, 1917. 
