VlTAOEAE. 



Vitis. Vine. Grape. j 



(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 

 ('-shaped series, usually indis- 

 tinct: stipule-scars long and nar- 

 row. References under Cissus. 



1. Pith without diaphragms: bark tight. (1). V. rotundifolia. 

 Pith firmer at the nodes: bark flaking. 2. 



2. Twigs distinctly angled, woolly. (2). V. cinerea. 

 Twigs nearly terete. 3. 



3. A tendril at each node. (Hybrids of, and) V. labrusca. 

 Tendrils lacking from usually each third node. 4. 



4. Spreading and rather bushy. 

 Climbing. 5. 



5. Nodal diaphragms thin (under 1 mm.) 

 Nodal diaphragms thick (2-4 mm.). 6. 



6. Panicle vestiges open and large. 

 Panicle vestiges. compactly branched. 



V. rupestris. 



(3). V. vulpina. 



V. cordifolia. 

 V. aestivalis. 



