CONVOLVULUS FAMILY. 307 



II. DODDER SUBFAMILY; slender parasitic twiners, 

 without green herbage and with only some minute scales in 

 place of leaves; embryo slender and spirally coiled in the 

 seed, destitute of cotyledons. 



6. CUSCUTA. Calyx 4-5-cleft, or of 5 separate sepals. Corolla short, 4-5-cleft. Stamens 

 with a scale-like mostly fringed appendage at their base. Styles 2 in our species. 

 Ovary 2-celled ; cells 2-ovuled. Pod commonly 4-seeded. 



1. IPOMGGA, MORNING-GLOKY, SWEET POTATO, etc. (Greek- 

 made name.) Many attractive cult, species. 

 » Stamens and style exserted; flowers bright red, opening by day, small 

 for the genus. 

 I. Qudmoclif, Linn, (or Quamoclit vulgXris). Cyprkss Vise. Cult, 

 from Trop. Amer.; leaves pinnately parted into slender, almost thread- 

 shaped divisions ; peduncles l-flowered ; border of the narrow corolla 

 6-lobed. (Lessons, Fig. 250.) 



I.coccinea, Linn. Leaves heart-shaped, pointed ; sepals awn-pointed ; 

 peduncles several-flowered; border of (1' long) corolla merely 5-angled. 

 In gardens, and run wild S. Trop. Amer. (Lessons, Fig. 251.) 



* * Stamens and style short-exserted ; flowers white, opening once only 



and at night, very large and long-lubed. 

 I. B6na-N6x, Linn, (or C.vlonyctiox sPEcidsuji). Moonflower. 

 Tall-twining, very smooth, but stems often beset with soft, almost prickly 

 projections ; leaves heart-shaped, halberd-shaped, or angled ; pedimcles 

 long, l-few-flowered ; corolla salver-forin, with a slender tube 3'-i'long, 

 and the border still broader, white with greener folds, fragrant. Trop. 

 Amer., and evidently native in S. Fla. Variable, and sold under several 

 names. 



* * * Stamens and style not exserted; colors various, and corolla mostly 



campanidate. 

 H- Ocary and, pod ^-celled (or abnormally 4-celled), icith 2 seeds in each 

 cell; stigma more or le^is S-lobed ; corolla funnel-form, opening in 

 early morning for a few hours; stems twining freely, hairy, the hairs 

 more or less re'trorse. — Morning-glories. 



/. purpOrea, Lam. Common Morni-ng-glory. Cult, from Trop. Amer. 

 and wild around dwellings; with heart-sliaped, pointed, entire leaves, 

 ;j_4-flo\vered peduncles, and purple, sometimes variegated or nearly white 

 corolla, 2' long. ® (Lessons, Figs. 40-45, i)0, 247. 28:3.) 



/. hederdcea, Jacq. (L NfL.) Cult., or run wild S., native to Trop. 

 Amer.; with heart-shaped, 3-lobed leaves, 1-3-fiowered peduncles, slen- 

 der-pointed sepals, and blue-purple or sometimes white corolla l'-2' 

 long. ® 



L limb.\t\ or I. ALBO-MARGiNATA, of gardens, is a form of the pre- 

 ceding, with leaves little lobed, angled or entire, and larger corolla with 

 deep violet border, edged with white, 2i' broad. 



••- t- Ovary and pod generally 2-celled, the cells 2-seeded, or sometimes 

 each cell divided by a partition making 4 \-seeded cells; stigma capi- 

 tate, or the lobes, if any, only 2. 



++ Stem,s creeping or prostrate on the ground, not twining. 



I. Batdfas, Lam. Swket Potato. Stems long and smooth, producing 



the large, fleshy, edible roots, for which the plant is cultivated ; leaves 



variously hcnrt-shapcd, halberd-shaped, or triangular, sometimes cut- 



lobed ; peduncles bearing '6 or 4 flowers ; corolla funnel-form, purple, U' 



