6 14 FLORA. 



Leaves woolly beneath. 



Pubescence rusty- brown; berries large, musky. I. V. Labrusca. 



Pubescence at length whitish ; berries small, black, not musky. 



Berries with bloom ; branches terete. 2. V. aestivalis. 



Berries without bloom ; branches angular. 3. V. cinerea. 



Leaves glabrate, sometimes slightly pubescent when young. 



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



Leaves not glaucous beneath. 



Leaves 3-y-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. 



Leaves somewhat shining above, the apex long-acuminate; inflores- 

 cence loose. 7. V. cordifolia. 

 Leaves dull, the apex short-acuminate or blunt; inflorescence com- 

 pact. 8. V. Bailevana. 

 Low; leaves small; berries sweet. 9. V. rupestris. 

 Bark close; pith continuous through the nodes. 10. F. rotundifolia. 



1. Vitis Labrusca L. NORTHERN Fox- or PLUM GRAPE. WILD VINE. (I. 

 F. f. 2398.) Young twigs, forked tendrils and petioles densely pubescent, espe- 

 cially when young; nodes solid, interrupting the pith. Leaves large, each opposite 

 a tendril or a flower cluster, varying from merely dentate to deeply lobed with 

 rounded sinuses; berries few, brownish -purple, about 1.8 cm. in diameter; seeds 

 3-6, about 8 mm. long ; raphe narrow. Thickets, N. Eng. to Ind., Ga. and Tenn. 

 May-June. Fruit ripe Aug. -Sept. 



2. Vitis aestivalis Michx. SUMMER GRAPE. SMALL GRAPE. (I. F. f. 

 2399.) Twigs and petioles glabrous or pubescent. Leaves as large as those of V. 

 Labrusca, dentate, or 3-5-lobed, sometimes becoming nearly glabrous; tendrils and 

 flower-clusters intermittent (wanting opposite each third leaf); inflorescence gen- 

 erally long and loose; berries numerous, about I cm. in diameter, acid; seeds 2 or 3, 

 about 6 mm. long ; raphe narrow. In thickets, southern N. Eng. to Fla., southern 

 Ont., Wis. and La. May-June. Fruit ripe Sept.-Oct. 



3. Vitis cinerea Engelm. DOWNY GRAPE. (I. F. f. 2400.) Young shorts 

 and petioles mostly floccose-pubescent ; tendrils intermittent. Leaves dentate, or 

 somewhat 3-lobed, often longer than wide; inflorescence loose ; berries 6-8 mm. in 

 diameter, pleasantly acid, i-2-seeded; seeds about 4 mm. long, the raphe narrow. 

 111. to Neb., Kans. and Tex. 



4. Vitis bicolor LeConte. BLUE OR WINTER GRAPE. (I. F. f. 2401.) Ten- 

 drils intermittent; branches terete. Twigs bluish-glaucous, the bloom sometimes 

 disappearing ; internodes long ; leaves usually 3-lobed, cordate, sometimes 3 dm. 

 long, the sinuses rounded, the lobes acute or acuminate ; inflorescence compact ; 

 berries bluish-black with a bloom, sour, about 8 mm. in diameter ; seeds about 4 

 mm. long, raphe narrow. Northern N. Y. to Mich, and N. Car. 



5. Vitis vulpina L. RIVERSIDE OR SWEET SCENTED GRAPE. (I. F. f. 2402.) 

 Glabrous, or pubescent on the veins of the lower surfaces of the leaves; branches 

 rounded or slightly angled, greenish; tendrils intermittent. Leaves thin, shining, 

 the terminal lobe commonly long; stipules 4-6 mm. long, often persistent until the 

 fruit is formed; berries bluish-black, 8-io mm. in diameter, rather sweet; seeds 

 2-4, 4 mm. long, the raphe narrow. Along rocky river-banks, N. S. to Manitoba, 

 Md. and Ark. May-June. Fruit beginning to ripen in July. 



Vitis L6ngii Prince, which differs from V. vulpina in its floccose pubescent shoots 

 and lower leaf-surfaces, the leaves more circular in outline, is reported from Kansas, 

 and extends through western Tex. to N. Mex. 



6. Vitis palmata Vahl. MISSOURI GRAPE. (I. F. f. 2403.) Glabrous or 

 nearly so, or with slight pubescence on the veins of the lower surfaces of the leaves; 

 twigs bright red; bark separating in large flakes; tendrils intermittent, forked. 

 Leaves dull, darker green than in V. vulpina, deeply 3-5 -lobed; stipules 3-4 mm. 

 long; inflorescence loose; berries black, 8-10 mm. in diameter; seeds I or 2, about 

 6 mm. long; raphe indistinct. River-banks, 111. and Mo. June-July. 



