264 CONVOLVULUS FAMILY. 



I. paudurata, Wild Potato- Vine or Man-of-the-Earth. 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 - .5-flowered . 

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

 eye, 2' - 3' long ; root very large and deep. 11 



I. sagittifblia. 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. lacunosa. Low grounds, Penn. to 111. and S. : twining, nearly smooth, 

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

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

 sepals, and slightly hairy pod. 



I. COmmutata. 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. CONVOLVULUS, BINDWEED. (From Latin convolvo, to roll 

 around or twine. ) Fl. summer. 



C. arv6nsis, 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-flowcred ; corolla white tinged reddish, less than 1' long. 2/ 



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. (I) 



4. CALYSTEGIA, BRACTED BINDWEED. (From Greek words 



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



C. sepium, 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 j' - 2' long. IJ. 



C. spithamsea. 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. 1^ 



5. BOTTAMIA. (Named for F. Bonamy.) Low, small-flowered: corolla 

 more or less silky or hairy outside : fl. summer : chiefly S. 11 



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 precjcling ; 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, tapering to a sessile base ; bracts leaf-like and longer than the 

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

 middle, and with stamens also protruding. 



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

 Low and diminutive small-fl(»wered plants, only S. Fl. summer. 11 



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

 6' -7' high, silky-woolly all over; broadly lanceolate leaves crowded, mostly 

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



E. Sericeus. Damp ground 8. & S. W. : slcnder-stcmnied, silky with 

 fine appro sod hairs, except the u])per face of the scattered lancc-lineai- leaves; 

 corolla white or bluish, not ^' broad. 



