66 A GUIDE TO THE WILD FLOWERS 



stems, — not woody ones, like the grape. A few partially 

 woody vines are noted in their proper places. Sometimes they 

 scramble over fences and walls, like the Virgin's Bower and 

 Mikania, or again, they may sprawl over the ground, as the 

 wild Convolvulus so often does. Others go straight up tree 

 trunks, or clamber over bushes, like the Dodder. 



A curious prolongation of the leaf,' or of the stem, but 

 neither one nor the other, is found in many vines, — a tendril. 

 Often coiled, usually fine and thread-like, tendrils are of con- 

 siderable use to vines. Pictures of tendrils are shown at 

 figures 1 88-1 91 and 217-224. 



All our herbaceous vines may be divided into two groups, 

 and there is one curious leafless sort, that, by its parasitic 

 habit and leafless yellow stems, dififers from all other vines 

 in the region. (Two parallel-veined herbaceous vines are 

 treated at nos. 131 and 132, and the Money Wort, a vine-like 

 herb at no. 468.) The vines may be separated thus : 



Leaves compound no. 214 



A leafless, sprawling yellow-stemmed vine, always firmly attached 

 (parasitic) to other plants Dodder no. 242 



Leaves simple 



Vines without tendrils no. 192 



Vines with tendrils (see figs. 188-191) 



Flowers large, solitary and showy .... Passion-flower no. 188 

 Flowers small ; in clusters, never solitary Gourds no. 189 



188. PASSION-FLOWER. PASSIFLORA. 



High climbing vines with tendrils, and large, lobed leaves. 

 Flowers usually arising at the base of the leaf-stalk, never 

 more than one at such a joint. Flowers with a double or 

 triple row of thread-like organs, thus appearing fringed. 

 Fruit a berry. {Passi florae cae.) 



Passion-flower or Passion-vine. Passi flora lutea. Fre- 

 quently climbing up to 10 feet, and quite smooth. Leaves 

 broader than long, with three smooth, marginal lobes, and 

 heart-shaj^ed at the base. Flower greenish-yellow, about % 

 inch across. Berry round, purple, about 3^ inch in diameter. 

 Pa. to III., and Mo., south to Fla. and Texas. June. Figure 

 188. A related species, with a purplish flower, toothed leaves. 



