Trees, Shrubs and Vines 



28. Wild Cypress-vine. (Ipomcea coccinea.) 



Leaf : 2-3', simple, alternate, entire or slightly lobed or angled, 

 base cordate, apex sharp. Flower : scarlet, occasionally yellow- 

 ish, i' long (corolla tubular with flat border, stamens protruding), 

 about 5-clustered ; twining ; herbaceous. Middle States, Virginia, 

 and south. (PL IV.) 



29. White Star-ipomcea. (I. lacunosa.) 



Leap": 2', simple, alternate, entire or lobed, heart-shaped, apex 

 sharp. Flower : white (or purple-edged), bell-shaped (corolla 

 5-lobed, yi'-'i-' long, sepals pointed and hairy, no leafy bracts at 

 base of calyx), 1-3-clustered ; August, September. Pennsylvania 

 to Illinois, and south ; twining and traiUng ; herbaceous. 



30. Field Convolvulus. (C. arvensis.) 



Leaf: 2-4', simple, alternate, entire, somewhat arrow-shaped, 

 the projections at base j//d!r/. Flower- white or reddish-tinged 

 (corolla funnel- to bell-shaped, 3^' long), mostly single ; June , in 

 old fields. Maine to Virginia ; twining or trailing (sometimes 

 erect). (PI. IV.) 



31. Pipe-vine. Dutchman's Pipe. Wild Ginger, 



(Aristolochia sipho.) 



Leaf : 6'-i2' across, simple, alternate, entire, roundish, base 

 cordate. Flower ; brownish (no corolla, calyx i^' long, tubular, 

 bent, with brownish-purple flat border), single or paired ; May, 

 June, Pennsylvania to Kentucky, and south ; cultivated ; twin- 

 ing, woody. (PI. IV.) 



32. Black Bindweed. (Polygonum convolvulus.) 



Leaf • i'-2', simple, alternate, entire, halberd-shaped, base 

 cordate ; stalk a little rough, not prickly ; base of sheathing stip- 

 ules not bristle-fringed. Flower : whitish, or greenish-rosy - 

 tinted, small (no corolla, calyx 4-5-parted, 3 outer lobes keeled 

 or angled), in short racemes ; July, August ; seed not glossy. 

 Eastern States ; climbing and trailing. 

 318 



