1 62 Buckwheat (Polygonacece). [No. 22 



Fig. 77.— (4) Bristly-Jointed Bindweed. Bristly-Jointed 

 Knotweed. P. cilinbde, Mx. 



Flowers, in loose, nearly leafless clusters, five inches in 

 length or so, at the sides and the ends of the branches. 

 Calyx, five-lobed, the outer lobes only obscurely 

 keeled. Stamens, eight. Styles, three, very short. 

 July to September. 



Leaves, one to one and a half inches or more in length, 

 egg-shape, minutely downy. Apex, taper-pointed. 

 Base, deeply heart-shaped, with the lobes sometimes 

 slightly spreading. Sheathing-stipules, at the joints, 

 minutely fringed at the base with reversed bristles. 



Fruit, three-angled, not winged around as in No. 5 

 (Hedge Bindweed). Achene, very smooth and shin- 

 ing, the sides elliptical. 



Found, in thickets and on rough hills, from Canada to the 

 mountains of North Carolina. 



A slender climbing and twining vine, minutely downy, 

 three to nine feet in length. 



Fig. 78.— (5) Hedge Bindweed. Climbing False Buckwheat. 



P. scdndens, L. 



Flowers, in interrupted, usually leafy clusters in the axils 

 of the leaves. Calyx, five-lobed, the three outer 

 sepals strongly keeled and becoming winged in fruit. 

 Stamens, eight. Styles, three, very short. July to 

 September. 



Leaves, two to three inches in length, egg-shape. Apex, 

 pointed. Base, lobed, the lobes slightly pointed, or 

 rounded, sometimes spreading. Sheathing-slipulcs, 

 not fringed at the base as in No. 4 (Bristly-Jointed 

 Bindweed). 



