CONVOLVULACEiE. (CONVOLVULUS FAMILY.) 333 



ornament, and one, the Sweet Potato, for its edible farinaceous roots : those 

 of several species are cathartic ; e. g. Jalap.) — There are three suborders, 

 or rather strongly marked tribes. 



Synopsis. 



TaraE I. COIIf VOIiVUIjX3.^« Embryo with broad and foliaceous cotyledons crumpled' 

 in the seed. Ovary 2-8- (or falsely 4-) celled. Pod usually septiftagal — Leafy plants. 



* Style Ij undivided. 

 4- Calyx naked, i. e. not enclosed or surrounded by bracts. 



1. QUAMOCLIT. Stamens exserted. Corolla cylindrical-tubular, with a spreading border. 



Stigma capltate-2-lobed. Pod 4-celled ; the cells l-seeded. 



2. IPOMOSA Stamens included. Corolla funnel-form or bell-shaped. Stigma capitate, of- 



ten 2- 3-lobed. Pod2-3-celled; cells 2-seeded. 



3. CONVOLVULUS. Stigmas 2, elongated, linear. Otherwise much as in No. 2. 



■I- H- Calyx surrounded by 2 broad bracts 



4. CALYSTEQLl. Stigmas 2, linear or oblong. Pod imperfectly 2-celled, 4-seeded. 



* * Style 2-cIeft, or styles 2, rarely 3. 



6. STYLISMA. Styles or their divisions simple : stigma depressed-capitate. 



TsiBE n. DICIIONDRE.X:. Pistils 2, separate. Otherwise nearly as Tribe I. 

 0. DICHONDBA. Corolla bell-shaped. Pods 2, each l-seeded. 



TiuBE III. CUSCTJTIIVESJE:. Embryo spiral, slender, destitute of cotyledons. Ovary 

 2-celled. — Leafless parasitic twiners. 



7. CUSCUTA. The only genus of the group. 



1. QUAMOCIilT, Toum. Cypress- Vine. 



Sepals mostly mucronate or awned. Corolla cylindrical-tubular, vrith a small 

 spreading border. Stamens and style protruded. Stigma capitate-2-lobed. 

 Pod 4-celled; the cells l-seeded. — Annual twiners, with red or crimson flowers. 

 (An aboriginal, probably Mexican, name.) 



1. Q. cooofNEA, Moench. Leaves heart-shaped, acuminate, entire, or 

 angled; sepals awn-pointed; corolla light scarlet (1' long). (Ipomcea coccinea, 

 i. ) — River-banks, &c., Ohio, Virginia, and southward. (Nat. from Trop. 

 Amer. or Ind.) 



Q. vuloAkis, the cultivated Ctpkess-Vinb, is becoming spontaneous in 

 the South. 



2. IPO ni OB A, L. Mokning-Glokt. 



Calyx naked at the base. Corolla bell-shaped, funnel-form, &c. Stamens 

 included. Stigma capitate, often 2 -3-lobed. Pod 2-celled, or in one group 3- 

 celled ; the cells 2-seeded. (Name, ex L. from i\jf, Ittos, a Bindweed [wliich it is 

 not], and oiioios, like.) 



5 1 . PHARBITIS, Choisy. — Pod 3- {rareli/ 4-) celled; the cells 2-seeded. 



1. I. puEPtKEA, Lara. (Common Mokning-Glokt.) Stem.s retroi-sely 

 hairy ; leaves lieart-sJiaped, acuminate, entire ; peduncles long, imibellatcly 3-5- 

 flowered ; calyx bristly-hairy below; corolla funnel-form (2 long), purple vaiy- 



