The Flora of the Cayuga Lake Basin 297 



2. Vitis (Tourn.) L. 



a. Tendril or inflorescence normally opposite each leaf ; leaf shallowly toothed, 

 permanently uniformly and densely rusty-tomentose beneath; berries 12-20 mm. 

 in diam. 1. V. labrusca 



a. Tendrils and inflorescences intermittent, none opposite each third leaf ; berries 

 6-12 mm. in diam. 

 b. Leaves shallowly dentate, glaucous and loosely rusty-tomentose or glabrate 

 beneath ; berries 8-12 mm. in diam. 2. V. aestivalis 



b. Leaves coarsely and sharply dentate, green and nearly glabrous beneath, never 

 tomentose ; berries 6-10 mm. in diam. 3. V . vulpina 



1. V. labrusca L. Northern Fox Grape. 



Thickets, river banks, and similar situations, in rich damp soil ; occasional. June 

 15-30. 



Escaped from cultivation: Enfield Glen (D.) ; Ringwood (D.!) ; roadside one 

 mile s. of Mecklenburg (£>.) ; railroad near the glass works (jD.) ; s. e. of Dryden 

 Lake ; roadside n. of Taughannock Gorge ; and elsewhere. 



Native : N. E. to Ind., southw. to Ga. and Tenn., mostly in the mts. ; less frequent 

 on the Coastal Plain. 



2. V. aestivalis Michx. Summer or Pigeon Grape. 



Dry thickets, in rocky, sandy, or gravelly, not strongly calcareous, soils ; com- 

 mon. June 15-July 10. 



Especially abundant on the ravine slopes and shores of Cayuga Lake; occasional 

 on the hills s. of Ithaca. 



S. N. H. to Kans., southw. to Fla. and Tex. ; fairly frequent on the Coastal 

 Plain. 



V. aestivalis Michx. and V . bicolor LeConte differ in degree of pubescence on 

 the lower surface of the leaf. This difference is very indefinite, often slight and 

 doubtfully important as a basis for nomenclatorial distinction. Plants in this flora 

 are generally more or less pubescent. 



3. V. vulpina L. (V. riparia of Cayuga Fl.) Frost Grape. 



River banks and thickets, in gravelly or sandy nonacid soils ; common. June. 



In most of the ravines of the basin ; Inlet Valley ; about Indian Spring and Ren- 

 wick woods; along the shores of Cayuga Lake and of most of its tributary streams. 

 Characteristic of rich alluvial stream banks. 



N. B. to Man., southw. to Fla., Tex., and Colo. ; rare or absent on the Coastal 

 Plain. A plant primarily of the rich soils of the interior. 



A form with thicker leaves, more or less pubescent beneath, is frequent on the cliff 

 talus along Cayuga Lake near Esty Glen. 



85. TILIACEAE (Linden Family) 



1. Tilia (Tourn.) L. 



a. Leaves glabrous except for tufts of hair in the axils of the veins. 



1. T. americana 

 a. Leaves more or less stellate-pubescent beneath. la. T. a., var. heterophylla 



1. T. americana L. Basswood. Linden. 



Ravines and woodlands of many types, in nearly neutral soils, especially where the 

 soil is heavy; frequent. July 12-30. 



N. B. to Man., southw. to Ga. and Tex. ; infrequent on the Coastal Plain. 



The bract is variable as to base and petiole, being in some instances rounded at the 

 base and very short-petioled, and in others tapering and long-petioled. The same 



