CONVOI-VULA^K.E. (CONVOLVULUS FAMILY.) 341 



8. Pn.VRBITIS. Capsule SocUed, the rells 2-spcdcd. Corolla bcll-phiiped. 



4. II'OMUCA. Ciipsule '2 celled, tho cells 2-.scuded. Corolla bell or fuunel-.shapcd. Stamens 

 ino>tly iucluJed. 



» « Style single. Stigmas ovate or cylindrical. 

 6. JACQUEMONTI.V. Capsule 2 celled, 4-seLded. Stigmas ovate, flattened. 



6. C.^LYSTHllIA. 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. EV0LVULU3. Styles separate, 2-parted or 2-cleft. 



9. STYLIS.MA. Styles separate or partly united, entire. 



Tribe IL DICHONDREiE. - Ovary double. Embryo with cotyledons. Capsule 

 utricular, 1-siedod. — Stems creeping. 

 9. DICHOXDItA. Corolla bell-shaped. Stigmas thick. Peduncle l-flowered. 



Tribe ni. C1D'SCUTE.ffi. — Ovary single. Embryo destitute cf cotyledons. Capstile 

 closed. 

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



1. QUAMOCLIT, Tourn. Cypress-Vink. 



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

 inserted at the hasc of the tube, dilated at the base, exserted. Ovary J-ecllcd. 

 Style single : stigma globular, 2-lobed. Capsule 4-valved, 4-sce(k'(l. — Twining 

 annual herbs, witli cordate entire or pinnatiiid leaves, aud red Ilower.s, on axil- 

 lary peduncles. 



1. Q. COCeinea, Mcench. Leaves pctioled, cordate, acuminate, angled at 

 the base ; jj^duiicles as long as the petioles, 3 - 5-flovvercd ; sepals awncd; co- 

 rolla slightly lubed, scarlet. (Ipomoea coccinca, L.) — Cultivated ground, in the 

 middle and upi)jr districts, and northward. July and Aug. — Corolla 1' long, 

 Eomctimes yellowish. 



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

 peduncles I -3-llowered, the pedicels much thickened upward; sepals ovate or 

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



2. BATATAS, Chois. 



Sepals 5 Corolla hell-shaped, the limb 5-plaitcd, spreading. Stamens slightly 

 dilated at the b.ise, included. Ovary 4-eelled. Style simple : stigma globular, 

 2-lobed. Ca])sule 4-eellcd, 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 oMong, cordate, notched at the apex, entire or hastate-lobcd, the 

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

 bracts subulate ; scf)als oblong, mucronate ; corolla obscurely lohcd, white, the 

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

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

 rolla 2' long. 



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

 Potato. 



29* 



