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. CTJSCUTA. 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. IFOMCEA, MORNING-GLORY, 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. Qudmoclit, Linn, (or Quamoclit vulgaris). Cypress Vine. Cult, 

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

 shaped divisions; peduncles 1-flowered; border of the narrow corolla 

 5-lobed. (Lessons,, Eig. 250.) 



/. 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-tubed. 



I. B6na-N6z, Linn, (or Calonyction spbci6sijm). Moonflower. 

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

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

 long, 1-few-flowered ; corolla salver-form, with a slender tube 3'-4' 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 



campanulate. 



■*- Ovary_ and pod 3-celled (or abnormally 4-celled), with 2 seeds in each 

 cell; stigma more or less S-lobed; corolla funnel-form, opening in 

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

 more or less retrorse. — Morning-glories. 



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

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

 3-4-flowered peduncles, and purple, sometimes variegated or nearly white 

 corolla, 2' long. ® (Lessons, Figs. 40-45, 90, 247, 283.) 



/. hederacea, Jacq. (I. NfL.) Cult., or run wild S., native to Trop. 

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

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

 long. ® 



I. limbata 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, 2J' broad. 



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

 each cell divided by a partition making 4 1-seeded cells; stigma capi- 

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



** Stems creeping or prostrate on the ground, not twining. 



I. Batdtas, Lam. Sweet Potato. Stems long and smooth, producing 

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

 variously heart-shaped, halberd-shaped, or triangular, sometimes cut- 

 lobed ; peduncles bearing 3 or 4 flowers ; corolla funnel-form, purple, 1J' 



