506 



VITACEAE. 



VOL. II. 



Leaves glabrate, sometimes slightly pubescent when young. 



Leaves bluish-white glaucous beneath. 4. V. bicolor. 



Leaves not glaucous beneath. 



Leaves 3-7-lobed ; lobes acute or acuminate. 



Lobes and sinuses acute ; berries with bloom. 5. V . vulpina. 



Lobes long-acuminate ; sinuses rounded ; berries without bloom. 6. V, palmata. 



Leaves sharply dentate, scarcely lobed. 



Bark loose ; pith interrupted by the solid nodes. 



High-climbing ; leaves large ; berries sour. 7. V. cordifolia. 



Low ; leaves small ; berries sweet. 8. V. rupestris. 



Bark close ; pith continuous through the nodes. 



Genus MUSCADINIA Small. 



9. V. rotundifolia. 



i. Vitis Labrusca L. Northern Fox- or 

 Plum-grape. Wild Vine. Fig. 2830. 



Vitis Labrusca L. Sp. PL 203. 1753. 



Climbing or trailing, often ascending high 

 trees, sometimes forming a stem a foot in 

 diameter or more, the young twigs, forked 

 tendrils, petioles and lower surfaces of the 

 leaves densely rusty-pubescent, especially when 

 young. Bark loose and separating in strips; 

 nodes solid, interrupting the pith ; leaves 

 large, each opposite a forked tendril or a 

 flower cluster, varying from merely dentate 

 to deeply lobed with rounded sinuses; fertile 

 flowers in compact panicles, the sterile looser; 

 berries few, brownish-purple or yellowish, 

 about 9" in diameter, strongly musky ; seeds 

 3-6, about 4" long; raphe narrow. 



Thickets, Vermont to Indiana, New York, Geor- 

 gia and Tennessee. Recorded from Minnesota. 

 The cultivated Isabella, concord and catawba 

 grapes have been derived from this species. 

 Ascends to 2100 ft. in Virginia. May-June. 

 Fruit ripe Aug.-Sept. 



2. Vitis aestivalis Michx. Summer 

 Grape. Small Grape. Fig. 2831. 



Vitis aestivalis Michx. Fl. Bor. Am. 2 : 230. 1803. 



. High climbing, branches terete, the twigs 

 and petioles pubescent; bark loose and 

 shreddy ; pith interrupted at the nodes. Leaves 

 as large as those of V . Labrusca, dentate, or 

 3~5-lobed, floccose-woolly with whitish or 

 rusty pubescence, especially when young, 

 sometimes becoming nearly glabrous when 

 mature; tendrils and flower-clusters inter- 

 mittent (wanting opposite each third leaf) ; 

 inflorescence generally long and loose; ber- 

 ries numerous, about 5" in diameter, black, 

 with a bloom, acid, but edible; seeds 2-3, 

 about 3" long; raphe narrow. 



In thickets, southern New Hampshire to Flor- 

 ida, west to southern Ontario, Wisconsin, Kansas 

 and Texas. Ascends to 3500 ft. in North Caro- 

 lina. May-June. Fruit ripe Sept.-Oct. 



