326 CONVOLVULACE.E. (CONVOLVULUS FAMILY. ) 



7. PETUNIA, Juss. 



Calyx S-parted. Corolla fuiinelshaped, plicate. Stamens 5, unecjual; 

 aiitlier cells separate. Stigma cai)itatc. Capsule 2-valved, many-seeded. — 

 Clammy pubescent herbs. 



1. P. parviflora, .luss. Ammal, diffuse, leaves oldong-linear or spatu- 

 late ; corolla small, pale bluish purple. — l-lorida, and westward. Introduced. 



Order 92. CONVOLVULACEiE. (Convolvulus Family.) 



Chiefly twining or prostrate herbs, with alternate exstipulate leaves, 

 and regular mostly showy and fugacious flowers. — Calyx 5-.sepaloys, 

 imbricated. Corolla bell-shaped, funnel-shaped, or salver-form, 5- 

 plaited or o-lobed, convolute in the bud. Stamens 5, inserted on the 

 tube of the corolla : anthers 2-celled, sagittate. Ovary free, single or 

 double, 1-4-celled, with 1-2 erect anatropous ovules in each cell. 

 Styles 1 or 2, entire or 2-cleft. Stigmas capitate, ovate, or acute. 

 Capside 2 - 6-seeded. Embryo large, coiled or curved in mucilagi- 

 nous albumen. 



Synopsis. 



TwBE I. CONVOLiVULE.E. Ovary single. Embryo with leafy cotyledons. Cap- 

 sule opening by valves. — Flowers axillary, single or cymose. 



* Style single. Stigmas globose. 



1. IPOMCEA. Capsule 2-celled, the cells 2-seeded. Corolla bell- or funnel-shaped. Sta- 



mens mostly included. 



* * Style single. Stigmas ovate or cylindrical. 



2. JACQUEMONTIA. Capsule 2-celled, 4-seeded. Stigmas ovate, flattened. 



3. CONVOLVULUS. Capsule imperfectly 2-celled, 4-seeded. Stigmas cylindrical. 



* * * Styles 2, separate or partly united. Ovary 2-celled. 



4. EVOLVULUS. Styles separate, 2-parted or 2-cleft. 



5. BREWERIA. Styles separate or partly united, entire. 



Tbibe n. DICHONDRE.^. Ovary double. Embryo with cotyledons. Capsule 

 utricular, 1-seeded. — Stems creeping. 



C. DICHONDRA. Corolla bell-shaped. Stigmas thick. Peduncle I-flowered. 



Tribe III. CUSCUTE^. Ovary single. Embryo destitute of cotyledons. Capsule 

 closed. 



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



1. IPOMCEA, L. Morning Glory. 



Sepals 5. Corolla entire, or 5-angled, or 5-lobed. Stamens dilated at the 

 base. Ovary 2-celled, rarely imperfectly 4-celled. Style simple : stigma 

 capitate, 2-lol)ed. Capsule 2 -4-celled, 2-4-valved, 4-seeded, or, by abortion, 

 1 -3-seeded. Seeds smooth or hairy. — Twining or trailing rarely erect 

 herbs, with cordate or sagittate entire or variously lobed leaves, and showy 

 flowers on axillary peduncles. 



