264 CONVOLVULUS FAMILT. 



1. pandur&ta, Wild Potato-Vine or Man-of-thb-Earth. Sandy oi 

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

 shaped and sometimes fiddle-shaped or halberd-3-lobed leaves, 1 - .5-flowered 

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

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



I. sagittif61ia. 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. 11 



I. 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 J' long and twice the length of the pointed ciliate 

 sepals, and slightly hairy pod. (i) 



I. COmmuf &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 l'-2' long 

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



3. COTirv6LVULtrS, bindweed. (From Latin cmvolvo, to roll 

 around or twine.) El. summer. 



C. arv^nsis, Field Bindweed of Eu., is a weed on the coast B. : spread- 

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

 duncles 1-flowered ; corolla white tinged reddish, less than 1' long. 5 



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

 branching stems, lance-obovate or spatulate almost sessUe leaves, l-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. (From Greek words 

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



C. S^piuin, Hedob 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 ; 

 eoroUa white or light rose-colored, 1^' - 2' long. y. 



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

 leaves oblong, 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. humistrita. 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. aqu&tica. 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. Fickeringii. Sandy barrens from N. Jersey S., scarce: leaves nearly 

 linear, narrow, tapering 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. EVdLVTJLUS. (From Latin for unrdl, that is, it does not twine. | 

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



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

 h'-T high, silky-woolly all over; broadly lanceolate leaves crowded, mostly 

 nearly sessile, as are the flowers in their axils ; corolla purple ; 4' broad. 



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

 fine appressed hairs, except the upper face of the scattered lance-lmear leaves, 

 corolla white or bluish, not J' broad. 



