264 CONVOLVULUS FAMILY. 



I. pandor^ta, Wild Potato- Vine or Man-ot-tiie-Eaeth. Sandy or 

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

 shaped and sometimes fiddle-shaped or halberd-3-lobed leaves, 1 - .'i-flowered 

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

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



I. sagittifolia. Salt-marshes, 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. y. 



I. laoundsa. 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 i/ long and twice the length of the pointed ciliate 

 sepals, and slightly hairy pod. (I) 



I. commut^ta. Low grounds S. & W. : 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. CONVbLVULUS, BINDWEED. (From Latin eonvolvo, to roU 

 around or twine. ) Fl. summer. 



C. arv^usis, Eield Bindweed of Eu., is a weed on the coast E. ; spread- 

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

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



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

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

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

 with pale or white throat and yellow tube. ® 



4. CALYSTEGIA, BRACTED BINDWEED. (Erom Greek words 

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



C. s6pium, Hedge B. Wild in low grounds, also planted : twining freely, 

 sometimes also trailing, spreading by running rootstocks ; 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, y 



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

 leaves oblona;, some of them more or less auricled or heart-shaped at the base ; 

 corolla white, 2' long, y 



6. BONAMIA. (Named for F. Bonamy.) Low, small-flowered : corolla 

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



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

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

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



B. aquitica. Along ponds S. : finely soft^downy ; leaves varying as in 

 the precedmg ; sepals silky ; corolla pink or purple i' long ; filaments smooth ; 

 styles nearly separate. 



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

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

 flowers ; sepals hairy ; coro'U white, hardly i' long ; styles united to above the 

 middle, and with stamens also protruding. 



C. EVOLVIJIiUS. (From Latin for unroll, that is, it does not twine.) 



Low and dimmutive small-flowered plants, only S. El. summer, y 

 . , ■^.;, ai'S^'^teus. Dry ground from Missouri S. : tufted from a woody base, 

 5' -7' high, silky-woolly all over; broadiv lanceolate leaves crowded mostly 

 noarly sessile, as are the flowers in their a.xi^s ; corolla purple ; i' broad 



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

 line apprcsscd hairs, except the upper face of the scattered lance-linear leaves • 

 corolla white or bluish, not ^' broad. ' 



