224 VITACEAE. 
ViTis.. Vine. Grape. 
(Family Vitaceae). 
Rather hard-wooded climbers, 
often very thick-stemmed in the 
forest, with usually very flaking 
bark: deciduous. Stems striate, 
subterete or exceptionally angled, 
moderate: pith moderate, brown, 
continuous or somewhat fissued 
near the swollen nodes, usually 
with a firmer diaphragm at each 
node. Tendrils opposite the leaf- 
scars, not thickened at tip. Buds 
subglobose, not superposed, but 
collaterally branching, with 2 
broad scales, the end-bud lack- 
ing. Leaf-scars’ alternate, 2- 
ranked, half-round or _ crescent- 
shaped: bundle-traces several in a 
C-shaped series, usually  indis- 
tinct: stipule-scars long and nar- 
row. References under Cissus. 
. Pith without diaphragms: bark tight. (1). V. rotundifolia. 
Pith firmer at the nodes: bark flaking. 2. 
. Twigs distinctly angled, woolly. (2). V. cinerea. 
Twigs nearly terete. 3. 
. A tendril at each node. (Hybrids of, and) V. labrusca. 
Tendrils lacking from usually each third node. 4. 
. Spreading and rather bushy. V. rupestris. 
Climbing. 5. 
. Nodal diaphragms thin (under 1 mm.) (3). V. vulpina. 
Nodal diaphragms thick (2-4 mm.). 6. 
. Panicle vestiges open and large. V. cordifolia. 
Panicle vestiges compactly branched. V. aestivalis. 
