446 ORDEK LXXXVI. CONVOLVULACEiE. 



Genus II.— IPOMCE'A. L. 5—1. 

 (From ips, bind-weed, and homoios, similar.) 



Resembling the preceding genus. Stigma capitate, globose. 

 Capsule 3-celled. 



1. I. orbicularis, (E1L) Stem prostrate. Leaves orbicular, emargi- 

 nate, coriaceous, ou rather long petioles ; peduncles usually 3-flowered, 

 partial peduncles bracteate. Sepals ovate, slightly mucronate. Corolla 

 with a short tube. — Purple. If Through the summer. On the 

 coast. 



2. I. bo'na nox, (Pursh.) Stem prostrate, roughened, sometimes 

 prickly. Leaves cordate, entire, or angled ; peduncles 1 — 3-flowered. 

 Calyx awned. Corolla undivided, with a long tube, large, white. 



Calonyction spuriosum, Chois. 



3. I. coccin'ea, (L.) Stem twining. Leaves alternate, cordate, acu- 

 minate, angled at the base ; peduncles 3 — 5-flowered. Sepals awned. 

 Corolla salver-form ; limb plaited. — Ked. 0. June — Sept. Common. 



Quamoclit coccinca, Moen. 



4. I. trichocak'pa, (Pursh.) Stem twining, hairy, angled. Leaves 

 cordate when young, 3-lobed when old ; villous margins frequently 

 purple ; peduncles 1 — 3-flowered, with 2 bracts at each division. Sep- 

 als oblong, ciliate. Corolla pubescent on the inside near the base. 

 Stigma globose. Capsule 4-celled, hairy. — Purple or red. 0. July — 

 Oct. In cultivated lands. Common. /. commutata, R. 



5. I. nil, (Pursh.) Stem twining, hairy. Leaves cordate, the old 

 ones 3-lobed, acuminate ; peduncles 1 — 3-flowered ; segments of the 

 calyx subulate, long, villous. Corolla with the limb obscurely 5-angled. 

 Stigma globose. — White and blue. 0. In cultivated lands. Common. 

 Aug. — Oct. Pharbitis nil, Chois. 



6. I. dissec'ta, (Pursh.) Stem hairy. Leaves 7-lobed, glabrous, on 

 pubescent petioles; segments sinuate ; peduncles 1-flowered ; segments 

 of the calyx oval. Corolla campanulate. — 0. July. Calcareous soils. 

 Geo. and Flor. L sinuata, Ait. 



Genus III— CALYSTE'GIA. Br. 5—2. 

 (From kalux, a calyx, and siege, a covering.) 



Bracts 2, opposite, inclosing the flower. Sepals 5, equal. 

 Corolla campanulate. Style 1. Stigma 2-lobed. Ovary 2- 

 celled, sometimes 1 -celled. 



1. C. Catesbkian'a, (Pursh.) Stem voluble, tomentose. Leaves cor- 

 date, oblong-lanceolate, or sagittate, acute, tomentose ; peduncles 

 1-flowered ; bracts lanceolate, acuminate, somewhat inflated. Sepals 

 obtuse. — Car. 



2. C. paraoox'a, (Pursh.) Stem lying on the ground, tomentose. 

 Leaves oblong, cordate-sagittate, acute ; peduncles 1-flowered, elon- 

 gated ; bracts linear, remote from the flower. Sepals naked, smooth, 

 acuminate. — White. Vir. — Car. 



The medicinal substances, Jalap and 8cammony,are the production of plants of this 

 order. The former from the Cnnrolriilun jahip'a, a native of Mexico, and the latter 

 from the 0. 6cam//ionia, indigenous in Greece and the East 



