CONVOLVULUS FAMILY. 309 



2. CONVOLVULUS, BINDWP:p:I). (From Latin convolvo, roll 

 around or twine.) Flowers summer. 



* Calyx inclosed in 2 large leafy bracts. 



C. s^pium, Linn. 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. Variable; sometimes double-flowered in gardens. ^ 



C. spithamEeuB, Linn. 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. ^ 



* * Calyx naked. 



C. arvensis, Linn. Field Bindweed. Eu. ; a weed in waste places 

 E.; spreading and low-twining, smoothish ; leaves ovate-oblong and 

 arrow-shaped ; peduncles 1-flowered ; corolla white tinged reddish, less 

 than 1' long. % 



C. tricolor, Linn. (C. minor, of gardens.) Cult, from S. Eu.; hairy, 

 low, with ascending branching stems, lance-obovate or spatulate, almost 

 sessile leaves, 1-flowered peduncles, rather large and showy flowers open- 

 ing in sunshine, the corolla blue, with pale or white throat and yellow 

 tube. (D 



C. Mauritdnicus, Boiss. Cult, from N. Africa ; prostrate or twining, 

 used in hanging baskets ; plant soft white-hairy ; leaves ovate, short- 

 petioled, in 2 rows ; flowers blue, with a white throat, 1' across ; calyx 

 hairy. 2/ 



3. NOLANA. (Latin : nola, a little bell.) Cult, for ornament, from 

 coast of Peru and Chile ; the following procumbent and spreading, 

 rather fleshy-leaved, smooth, except some scattered hairs on the stalks, 

 the showy blue flowers solitary on axillary or lateral peduncles, open- 

 ing in sunshine, all summer. 



N. atriplicifblia, Don. Leaves obovate or broadly spatulate (resem- 

 bling those of Spinach, whence the specific name) ; sky-blue corolla 2' 

 wide with white and yellowish center ; ovaries numerous in a heap, each 

 1-celled and 1-seeded. (j) 



N. prostrata, Linn. Less common ; has more petioled, rather narrower 

 leaves, smaller pale violet-blue flower striped with purple, and few ova- 

 ries, each of 2-4 cells, (i) 



4. BREWERIA. (Samuel Brewer, an English botanist.) Low, small- 

 flowered ; corolla more or less silky or hairy outside ; flowers summer ; 

 chiefly S. H 



B. humlstr^ta. Gray. Dry pine barrens from Va., 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. aqudtica, Gray. Finely soft-downy ; leaves varying as in the pre- 

 ceding ; sepals silky ; corolla pink or purple, |' long ; filaments smooth ; 

 styles nearly separate. N. Car., S. 



B. Pickerfngii, Gray. Sandy barrens from N. J., S. and W., scarce ; 

 leaves nearly linear, narrow, tapering to a sessile base ; bracts leaf-like 

 and longer than the flowers ; sepals hairy ; corolla white, hardly i' long ; 

 styles united to above the middle, and with stamens also protruding. 



