CONVOLVULACE^E. (CONVOLVULUS FAMILY.) 341 



8. PHARBITIS. Capsule 3-celled, the cells 2-seeded. Corolla bell-shaped. 



4. IPOMCEA. Capsule 2-celled, the cells 2-seeded. Corolla bell- or funnel-shaped. Stamens 



mostly included. 



* * Style single. Stigmas ovate or cylindrical. 



5. JACQUEMONTIA. Capsule 2-celled, 4-seeded. Stigmas ovate, flattened. 



6. CALYSTEGIA. Capsule imperfectly 2-celled, 4-seeded. Stigmas cylindrical. Calyx in- 



cluded in the membranaceous bracts. 



* * * Styles 2, separate or partly united. Ovary 2-celled. 



7. EVOLVULUS. Styles separate, 2-parted or 2-cleft. 



8. STYLISMA. Styles separate or partly united, entire. 



TRIBE II. DICHONDRE^l. Ovary double. Embryo -with cotyledons. Capsule 

 utricular, 1-seeded. Stems creeping. 



9. DICHONDRA. Corolla bell-shaped. Stigmas thick. Peduncle 1-flowered. 



TRIBE III. CTJ SCUTES. --Ovary single. Embryo destitute of cotyledons. Capsule 



closed. 

 10. CUSCUTA. Twining parasites, with scale-like leaves. Styles 2. 



1. QUAMOCLIT, Tourn. CYPRESS- VINE. 



Sepals 5. Corolla salver-form, 5-plaited, with the tube elongated. Stamens 

 inserted at the base of the tube, dilated at the base,,exserted. Ovary 4-celled. 

 Style single : stigma globular, 2-lobed. Capsule 4-valved, 4-seeded. Twining 

 annual herbs, with cordate entire or pinnatifid leaves, and red flowers, on axil- 

 lary peduncles. 



1. Q. COCCinea, Moench. Leaves petioled, cordate, acuminate, angled at 

 the base ; peduncles as long as the petioles, 3 - 5-flowered j sepals awned ; co- 

 rolla slightly lobed, scarlet. (Ipomoea coccinea, Z.) Cultivated ground, in the 

 middle and upper districts, and northward. July and Aug. Corolla 1' long, 

 sometimes yellowish. 



2. Q. vulgaris, Chois. Leaves pinnatifid, with long and linear segments ; 

 peduncles 1 - 3-flowered, the pedicels much thickened upward ; sepals ovate or 

 oblong, awnless. Spontaneous near gardens. July - Oct. 



2. BATATAS, Chois. 



Sepals 5 Corolla bell-shaped, the limb 5-plaited, spreading. Stamens slightly 

 dilated at the base, included. Ovary 4-celled. Style simple : stigma globular, 

 2-lobed. Capsule 4-celled, 4-seeded. Trailing or twining herbs, with entire 

 or lobed leaves. Peduncles axillary, 1 - several-flowered. 



1. B. littoralis, Chois. Smooth and fleshy; stem prostrate, creeping; 

 leaves oval or oblong, cordate, notched at the apex, entire or hastate-lobed, the 

 lateral lobes entire or 2-cleft ; peduncles as long as the petioles, 1-flowered ; 

 bracts subulate ; sepals oblong, mucronate ; corolla obscurely lobed, white, the 

 tube yellowish. (Convolvulus obtusilobus, Michx.) Drifting sands along the 

 coast, Florida to South Carolina. May - Sept. 1J. Leaves 1' - 2' long. Co- 

 rolla 2' long. 



B. EDULIS, Chois., includes the different kinds of the cultivated SWEET 

 POTATO. 



29* 



