1918] SARGENT—CARYA 251 
cannot be specifically distinguished from that species, and is here 
treated as 
CarYA BUCKLEYI var. villosa, nov. comb.—Hicoria glabra var. 
villosa Sargent, Silva N. Am. 7:167. pl. 355. 1895; Hicoria villosa 
Ashe, Bull. Torr. Bot. Club 24:481. 1897; Sargent, Man. 145 (in 
part). 1903; Carya villosa Schneider, Ill. Handb. Laubholz. 1:803. 
1906; Carya glabra var. villosa Robinson, Rhodora 10:32. 1908.— 
Differing from the type in its smaller obovoid or ellipsoidal fruit 
with a thinner often indehiscent involucre. 
A single tree, the type of this variety, was found nearly 40 years 
ago by the late GEorGE W. LETTERMAN on a dry rocky hillside at 
Allenton, St. Louis County, Missouri, where it is still growing. 
LETTERMAN considered it a hybrid. Before the Texas hickory and 
its varieties were recognized it was considered a variety of Carya 
glabra, from which it differs in its pubescence and in its usually 
more dehiscent involucre. There would be more reason in follow- 
ing AsHE and treating it as a species did not trees occur with fruit 
which approaches in its larger size and thicker involucre that of 
the var. arkansana which occasionally grows with it in Missouri. 
The Allenton tree has thick, rough, deeply furrowed, nearly 
black bark similar to that of C. Buckleyi as it grows near Denison, 
Texas. On trees growing in better soil in other parts of the state 
the bark is often paler and less deeply furrowed. The leaves of the 
typical tree are 5~7-foliolate, with pubescent petioles and rachis, 
becoming glabrous or nearly glabrous; the leaflets are lanceolate 
to oblanceolate, long-pointed, with prominent reticulate veinlets, 
the lateral nearly sessile, the terminal short-petiolulate, nearly 
glabrous above and early in the season covered below with rusty 
pubescence and small brownish scales, in the autumn glabrous or 
nearly glabrous with the exception of the fascicled hairs on the 
lower side of the midrib. The fruit of the Allenton tree is obovoid, 
cylindrical, sometimes slightly winged above the middle, about 
2.5 cm. long and 1.8 cm. in diameter, rusty pubescent and covered 
with scattered yellow scales; the involucre is about 2 mm. in thick- 
ness and is indehiscent or splits tardily to the base usually only by 
2sutures. The nut is ovoid, rounded at base, pointed at apex, only 
slightly angled, thin-shelled, and faintly tinged with red. The 
