264 CONVOLVULUS l^AMILt. 



I. pandur^ta. Wild Potato- Vine or Man-of-the-EaMh. Sandy or 

 graTcUj- Soil, Conn, to 111. & S. : trailing or twining, stout, smooth, with heart- 

 shaped and sometimes fiddle-shaped or halberd-.3-lobed leaves, I - 5-flowered 

 peduncles, small bracts, and open fuunel-form white corolla with deep purple 

 eye, 2' - 3' long ; root very large and deep. % 



I. sagittif61ia. Saltmarshes, from North Carolina S. : smooth, with 

 stems twining 2° -3° high, or trailing, narrow lanceolate or linear long-sagittate 

 leaves, 1 - 3-flowered club-shaped peduncles, and the bright purple funnel-form 

 corolla 2' - 3' long. % 



1. lacundsa. Low grounds, Penn. to 111. and S. : twining, nearly smooth, 

 with heart-shaped nearly entire leaves, short 1 - 3-flowered peduncles, small 

 white 5-lobed corolla about ^' long and twice the length of the pointed ciliate 

 sepals, and slightly hairy pod. (I) 



I. COmmut&ta. Low grounds S. & TV. : rather hairy, twining ; with thin 

 heart-shaped and sometimes angled or 3 -5-lobed leaves, 4-angled 1-5-flowered 

 peduncles about the length of the slender petioles ; purple corolla 1'- 2' long 

 and 4-5 times the length of the pointed ciliate sepals ; pod hairy. 



3. COTifVbLVXJLTJS, BINDWEED. (From Latin convolvo, to roll 

 around or twine. ) 'El. summer. 



C. arvdnsis, Field Bindweed of Eu., is a weed on the coast E. : spread- 

 ing and low-twining, smoothish ; leaves ovate-oblong and narrow-shaped ; pe- 

 duncles 1-flowered ; corolla white tinged reddish, less than 1' long. ^ 



C. tricolor. Cult, from S. Europe in gardens ; hairy, low, with ascending 

 branching stems, lanee-obovate or spatulate almost sessile leaves, 1-flowered 

 peduncles, rather large and showy flowers opening iu sunshine, the corolla blue 

 with pale or white throat and yellow tube. ® 



4. CALYSTEGIA, BR ACTED BINDWEED. (From Greek words 

 denoting the calyx covered, that is, by the bracts. ) Fl. all summer. 



C. S^pium, Hedge B. Wild in low grounds, also planted : twining freely, 

 sometimes also trailing, spreading by running rootstoeks ; smooth, also a downy 

 variety ; leaves triangular and halberd-shaped or arrow-shaped, with the lobes 

 at base obliquely truncate and sometimes toothed or sinuate ; peduncles 4-angled ; 

 corolla white or light rose-colored, 1^' - 2' long. "if. 



C. spitliameea. Dry sterile ground ; downy, not twining, 6' -12' high; 

 leaves oblong, some of them more or less aurieled or heart-shaped at the base ; 

 corolla white, 2' long. y. 



5. BONAMIA. (Named for F. Bonamy.) Low, small-flowered : coroUa 

 more or less silky or hairy outside : fl. summer : chiefly S. 2/ 



B. humistr&ta. Dry pine barrens from Virg. S. : sparsely hairy or 

 smoothish ; leaves varying from oblong with heart-shaped base to linear ; sepals 

 smooth ; corolla white, almost 1' long ; filaments hairy ; styles united at base. 



B. aqudltica. Along ponds S. : finely soft-downy ; leaves varying as in 

 the preceding ; sepals silky ; corolla pink or purple ^' long ; filaments smooth ; 

 styles nearly separate. 



B. Pickeringii. Sandy barrens from N. Jersey S., scarce : leaves nearly 

 linear, narrow, tajjering to a sessile base ; bracts leaf-like and longer than the 

 flowers ; sepals hairy ; corolla white, hardly J' long ; styles united to above the 

 middle, and with stamens also protruding. 



6. EVOLVULUS. (From Latin for unroll, that is, it does not twine.) 

 Low and diminutive small-flowered plants, only S. Fl. summer. ^ 



E. arg^nteus. Dry ground from Missouri S. : tufted from a woody base, 

 5'-?' high, silky-woolly all over; broadly lanceolate leaves crowded, mostly 

 nearly sessile, as are the flowers in their axils ; corolla purple ; i,' broad. 



E. sericeus. Damp ground S. & S. W. : slender-stemmed, silky with 

 fine appresRod hairs, except the upper face of the scattered lanco-linear leaves , 

 corolla white or bluish, not }' broad. 



