The phylloxera having destroyed many of the finest vineyards in Europe, it would seem that Americans have the best of chances to supply the world with high-class wines, for there is not a State in the Union where the vine will not flourish. Here its worst enemy is mildew, a parasitical fungus which attacks the leaves, revealing itself in yellowish-brown patches on the upper side, and thin, frosty patches underneath. Soon the leaves become sere, and then they fall. The microscope reveals a miniature forest of growth in each leaf, with the threadlike roots of the fungi searching about the leaf cells for food. To burn old leaves, and to blow sulphur over the vine while it is wet, are efficacious remedies. Bees and wasps which puncture grapes to feast on them, are the innocent means of destroying quantities. Both the RIVERSIDE or SWEET-SCENTED GRAPE (V. vulpina; formerly V. cordifolia, var. riparia) - whose bluish-black, bloom-covered fruit begins to ripen in July; and the FROST, CHICKEN, POSSUM, or WINTER GRAPE (V. cordifolia), whose smaller, shining black berries are not at their best till after frost, grow along streams and preferably in rocky situations. The shining, light green, thin leaves of the sweet-scented species are sharply lobed, the three to seven lobes have acute teeth, and the tendrils are intermittent. The frost grape's leaves, which are commonly three or four inches wide, are deeply heart-shaped, entire (rarely slightly three-lobed), tapering to a long point and acutely toothed.