Manual of American grape-growing

by U. P. Hedrick

CC. Leaves rusty or white tomentose or glaucous blue below, thick or at least firm.

D. Leaves flocculent or cobwebby or glaucous below when fully grown.

7. V. æstivalis.
8. V. bicolor.

DD. Leaves densely tomentose or felt-like beneath throughout the season; covering white or rusty white.

E. Tendrils intermittent.

9. V. candicans.

EE. Tendrils mostly continuous.

10. V. Labrusca.

AA. Skin and pulp of mature berry cohering. (Old World.)

11. V. vinifera.