CONVOLVULACE^. (CONVOLVULUS FAMILY.) 341 



3. PILVRBITIS. Capsule Scelled, the cells 2-seeded. Corolla bell-shaped. 



4. IPOMIEA. Capsule 2-cel led, the cells 2-seeded. Corolla bell- or funnel-shaped. Stamens 



mostly included. 



* * Style single. Stigmas ovate or cylindrical, 



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



6. CALYSTEGL\. 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^. — Ovary double. Embryo with cotyledons. Capsule 

 utricular, 1-seeded. — Stems creeping. 



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



Tribe III. CUSCUTEjE. — 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 salvor-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 ; sepals awned ; co- 

 rolla slightly lobed, scarlet. (Ipomcea coccinea, L.) — 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-sceded. — 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. 1]. — Leaves l'-2' long. Co- 

 rolla 2' long. 



B. EDULis, Chois., includes the different kinds of the cultivated Sweet 

 Potato. 



29* 



