VITACEAE. 225 
PARTHENOCISSUS. Virginia Creeper. 
(Family Vitaceae). 
Somewhat fleshy woody climb- 
deciduous. Stems terete 
fo ers: 5 
moderate or rather slender: pith 
relatively large, continuous, green- 
ish and large-celled in the inter- 
nodes, whiter and more compact 
aie at the swollen nodes. Buds mode- 
ae rate, not superposed, but fre- 
g quently collaterally branching in 
re “ development, sessile, round-coni- 
\ 0 cal, with 2 or 3 exposed scales, the 
X 0 po ¢ end-bud absent. Leaf-scars alter- 
6 i} nate, half-round or nearly cir- 
2 “i y/ cular: bundle-traces about a dozen, 
0 ao Ww! rather indistinct, in an ellipse: 
Y“{ stipule-scars long and narrow. 
| ; ) Tendrils opposite the leaf - scars, 
g 
~ ofr) ! absent from every third node. 
Sy 0 . (Ampelopsis; Psedera). 
2 Winter-character references: — 
Parthenocissus quinquefolia (Am- 
pelopsis hederacea). Bosemann, 41; Hitchcock (3), 10; 
Schneider, f. 122. P. vitacea (A. quinquefolia). Brendel, 27, 
pl. 4. P. tricuspidata. Schaffner & Tyler, Ohio Naturalist, 
1:32. 
1. Nearly or quite glabrous. 2. 
Persistently distinctly pubescent. 4. 
2. Tendrils rarely with suckers, long. (1). P. vitacea. 
Suckers abundant at ends of the tendrils. 3. 
3. Tendrils rather long. P. quinquefolia. 
Tendrils and internodes short. (Bostonivy). P. tricuspidata. 
4. Pubescence coarse: not rooting. P. quinquefolia Engelmannii. 
Pubescence downy: rooting. P. quinquefolia Saint-Paulii. 
