JUGLANDACEAE OF THE UNITED STATES. 43 
elongated lenticels, terminal buds little longer than broad, 
and ovoid terete nuts with honeycombed surface; J. Mand- 
shurica (pl. 25, f. 4), with dark closely set pith plates, 
nearly glabrous somewhat glaucous reddish-brown twigs with 
very minute and inconspicuous lenticels, elongated buds, 
the lateral mostly on stalks of their own length, and ellip- 
soidal ridged and pitted nuts somewhat resembling those 
of regia; and J. cordiformis (pl. 25, f. 2), with pale, 
rather remote pith plates, brown twigs beset with very nu- 
merous long stiff ultimately deciduous brown hairs, the len- 
ticels elongated but mostly inconspicuous, somewhat elon- 
gated buds often strongly curved to one side, and ovoid 
sharply acuminate strongly flattened and 2-edged nuts 
with nearly smooth surface. 
** Leaf scars evidently notched, not surmounted by a tomentose 
elevation; nut subglobose, somewhat 4-celled at base. 
+ Western species; terminal buds elongated, their outer scales lobed 
above; fruit mostly small, the nut often only shallowly grooved 
and then with smooth rounded ridges. 
2. J. RUPESTRIS, Engelmann.— The Southwestern Wal- 
nut.— A shrub or small tree; bark rather thick, gray, 
sealy ; twigs slender, gray with a tinge of red or yellow, 
at first very densely buff-gray tomentose, the tomentum at 
length falling with the epidermis and exposing the small 
rounded pale lenticels; pith very small, brownish, with 
chambers several times as wide as the thin diaphragms ; 
terminal buds twice as long as broad, somewhat olivaceous ; 
nut often erosely roughened.— Texas, New Mexico and 
Arizona, extending into Mexico.— Pl. 24, f. 5-7. 
3. J. Catirornica, Watson.— The Californian Walnut.— 
Asmallor medium sized tree; bark thin, from whitish becom- 
ing dark brown; twigs stouter, glabrous except occasionally 
at the tip, and brown after the falling of the silvery epider- 
mis, lenticels pale, very small but evident; pith large, 
slightly darker, otherwise as in the last; terminal buds 
somewhat less elongated, of the color of the twigs or gray- 
