Description of Native Vines 



33. Bristly-jointed Bindweed. (Polygonum cilinode.) 



Leaf : 1-2', simple, alternate, entire, heart-shaped, apex ta- 

 pering ; base of sheathing stipules bristle-fringed. Flower : 

 as in 32, but outer calyx-lobes very slightly keeled ; July to Sep- 

 tember ; seed glossy ; twining. 



34. Climbing False Buckwheat. (Polygonum scandens.) 



Leaf : 2'-3', simple, alternate, entire, heart-shaped, apex 

 pointed ; sheathing stipules unfringed. Flower : as in 32, but 

 the clusters commonly leafy ; seed glossy ; fruit is margined, 

 as in elm-seeds, pink and quite showy ; climbs higher than 33. 

 (PI. IV.) 



35. Wild Yam-root. (Dioscorea villosa.) 



Leaf : 3', simple, mostly alternate (sometimes nearly opposite 

 or whorled), entire, heart-shaped, strongly pointed, somewhat 

 downy beneath. Flower : greenish-yellow, very small (no co- 

 rolla, calyx deeply 6-lobed, 6 stamens, 3 styles), in pendent ra- 

 cemes and panicles ; July. Commoner southward ; twining. 



36. Wintergreen. Checkerberry. (Gaultheria procumbens.) 



Leaf: i'-i^', simple, alternate, slightly serrate, oval to obo- 

 vate, evergreen, glossy, thick, aromatic. Flower : white (corol- 

 la rather ovoid, apex 5-toothed), mostly single, on short (s'-S'), 

 erect, leafy branches from trailing stem ; July-September ; berry 

 red, edible. Commoner northwiard. (PI. IV.) 



37. False Violet. (Dalibarda repens.) 



Leaf : i'-2', simple, alternate or clustered, round-toothed, 

 roundish, base cordate, downy, slender stem (i'-3'). Flower : 

 white (petals 5, obovate, spreading, stamens many, styles 5-10, 

 long), single (or two), on a long stem ; June-August. Pennsyl- 

 vania, and north, in woods ; short, herbaceous, trailing. 



38. Bitter-sweet. Wax-work. (Celastrus scandens.) 



Leaf : 2'-3>^', simple, alternate, finely serrate, oval to long- 

 ovate, apex pointed, smooth. Flower : greenish, small (petals 

 321 



