188 VITACEAE 



remain densely pubescent. The leaf blades, just about as long 

 as wide, are 2 to 7 inches long and generally 3- to 5-lobed. The 

 lobe tips are acute, and the sinuses are usually rounded, though 

 sometimes acute. The base of the leaf is deeply and narrowly, 

 or widely, U-shaped, and the margin is irregularly serrate with 

 low teeth ending in a small point. The leaf is covered above 

 and beneath by white, or rusty, cobwebby pubescence when it 

 unfolds but soon becomes smooth and bright green above while 

 remaining more or less cobwebby and rusty beneath, especially 

 along the veins. The lower surface is for the most part green 

 but may be glaucous or bluish green. The petioles, like the 

 leaves, are covered with cobwebby pubescence and are usually 

 one-third to two-thirds as long as the blade. 



The cylindrical or sometimes branched inflorescence arises 

 opposite a leaf, is 2 to 6 inches long, stands on a peduncle 

 sometimes as much as 2 inches long, and is in blossom through- 

 out the month of June. The berries, which mature in Sep- 

 tember and October, are somewhat more than ]/^ inch in 

 diameter, black, and bloom covered, and contain 2 to 4 seeds. 



Distribution. — The Summer Grape is an inhabitant of 

 woods and thickets from New Hampshire and Florida west- 

 ward to Kansas and Texas. It is found in suitable situations 

 practically throughout the state of Illinois and is perhaps the 

 most generally distributed wild grape in the state. 



As described here, the Summer Grape includes V. bicolor 

 Le Conte, which sometimes is distinguished as a separate 

 species, V. argentifolia Munson, or as the variety bicolor 

 (Le Conte) Deam, on the basis that the leaves are glaucous 

 beneath and nearly glabrous when old. 



VITIS CINEREA Engelmann 

 Sweet Winter Grape 



The Sweet Winter Grape, fig. 47, is a large, high-climbing 

 vine with angled branchlets, large, indefinitely lobed leaves, 

 and large, black fruit. The branchlets are densely covered with 

 persistent, gray pubescence and sometimes even appear woolly. 

 The leaf, generally somewhat longer than wide, is 2 to 6 inches 

 long and entire or furnished with 2 short and sometimes in- 

 distinct lateral lobes or shoulders, which point away from the 

 tip of the leaf. The sinuses between the lobes and the apex are 



