JUGLANDACEAE. 19 
PTEROCGARYA. 
(Family Juglandaceae). 
Trees: deciduous. Twigs moder- 
ate or rather stout, rounded: pith 
moderate, angular, chambered 
with rather close thin light brown 
plates. Buds rather large, super- 
posed, the upper distinctly stalked 
or elongating the first year, naked, 
with folded leaves. Leaf-scars 
alternate, elliptical or 3-lobed, 
large, rather low: bundle-traces 3, 
crescent- or horseshoe-shaped, cre- 
nated or fragmented:  stipule- 
sears lacking. 
Winter-characters of Juglanda- 
ceae are discussed by de Candolle | 
in his classic memoir on the fam- 
ily published in volume 18 of the 
fourth series of the botanical sec- 
tion of the Annales des Sciences 
Naturelles, in 1862; and are shown 
in Michaux’ Sylva. 
References to Pterocarya:—P. fraxinifolia. Leavitt, Out- 
lines of Botany, 31, f. 22; Schneider, f. 5, 86. P. rhoifolia. 
Leavitt, Outlines of Botany, 29, f. 18; Shirasawa, 232, pl. 1. 
P. stenoptera. Schneider, f. 86. 
Like the other Juglandaceae, and particularly Juglans, 
Pterocarya well illustrates distinct superposed buds, of which 
the uppermost is largest. This is the usual condition in such 
cases. 
1. Twigs distinctly pubescent and glandular. P. stenoptera. 
Twigs essentially glabrous and glandless. 2. 
2. Twigs and buds red-brown. (1). P. fraxinifolia. 
Twigs and buds gray-brown. P. rhoifolia. 
