368 CONVOLVULACEuE. (CONVOLVULUS FAMILY.) 



vated for ornament, and one, the Sweet Potato, for its edible farinaceous 

 roots; those of several species are cathartic ; e. g. Jalap.) 



Tribe I. DICHONDKE^E. Carpels 2 or 4, distinct or nearly so ; styles 2, basilar. 

 Creeping herbs. 



1. Dichondra. Corolla deeply 5-cleft. Pistils 2, one-seeded. 



Tribe II. CONVOI,VUI,E^E3. Ovary entire. Leafy plants, mostly twiner*. 



2. Ipomoea. Style undivided, with stigma capitate or 2 - 3-globose. 



3. Convolvulus. Style undivided or 2-cleft only at apex ; stigmas 2, linear-filiform to 

 subulate or ovate. 



4. Breweria. Style 2-cleft or 2-parted; the divisions simple; stigmas capitate. 



5. Evolvulus. Styles 2, each 2-cleft; stigmas linear-filiform. Not twining. 



Tribe III. CUSCUTE^. Ovary entire. Leafless parasitic twining herbs, never green. 

 Embryo filiform, coiled, without cotyledons. 



6. Cuscuta. The only genus of the group. 



1. DICHONDBA, Forst. 



Calyx 5-parted. Corolla broadly bell-shaped, 5-cleft. Stamens included. 

 Styles, ovaries, and utricular 1 - 2-seeded capsules 2, 'distinct. Stigmas thick. 

 Small and creeping perennial herbs, soft-pubescent, with kidney-shaped 

 entire leaves, and axillary 1 -flowered bractless peduncles. Corolla small, yel- 

 lowish or white. (Name from Sis, double, and x ov ty*> grain; from the 

 fruit.) 



1. D. r&pens, Forst. Leaves round-kidney-shaped, pubescent, green 

 both sides; corolla not exceeding the calyx (1 - \%" long). Wet ground, 

 Va. to Tex., near the coast. 



2. IPOMCEA, L. MORNING GLORY 



Calyx not bracteate at base, but the outer sepals commonly larger. Corolla 

 salver-form or funnel-form to nearly campanulate ; the limb entire or slightly 

 lobed. Style undivided, terminated by a single capitate or 2 - 3-globose stig- 

 ma. Capsule globular, 4-6 (by abortion fewer) -seeded, 2-4 -valved. (Name, 

 according to Linnaeus, from fy, a Bindweed , and fyiotos, like ; but fy is a worm.) 

 1. QUAMOCLIT. Corolla salver-form, or with somewhat funnel-form but nar- 

 row tube ; stamens and style exserted ; flowers red. % Annual twiners. 



I. QUAMOCLIT, L. (CYPRESS-VINE.) Leaves pinnately parted into linear- 

 thread-shaped delicate parallel lobes; peduncles 1 -flowered; corolla narrow, 

 scarlet-red, or sometimes white. (Quamoclit vulgaris, Choisy.) Sparingly 

 spontaneous southward. (Trop. Amer., etc.) 



I. cocci NEA, L. Leaves heart-shaped, acuminate, entire or angled ; sepals 

 awn-pointed ; corolla light scarlet (!' long). (Quamoclit coccinea, Moench) 

 River-banks, etc., Ohio to 111., Va., and southward. (Probably indigenous in 

 N. Mex. and Arizona.) 



2. IPOMCEA proper. Corolla funnel-form or nearly campanulate, contorted 

 in the bud ; stamens and style not exserted. 



* (MORNING GLORY.) Lobes of stigma and cells 3 ; sepals long and narrow, 

 attenuate upward, mostly hirsute below ; corolla purple, blue, and white. 



I. HEDERA.CEA, Jacq. Stems retrorsely hairy, leaves heart-shaped, 3-lobed, 

 the lobes acute or acuminate ; peduncles short, or rather long, 1 - 3-flowered ; 

 calyx densely hairv below; corolla white and purple or pale blue (1 - \% 

 long). (I. Nil. of Manual, not Roth.) Waste and cultivated ground, Penn. 

 to Fla., and La. (Trop. Amer.) 



