208 CONVOLVULACE^E. Dichondra. 



TEIBK II. CONVOLVULE^E. Ovary entire. Plants with ordinary foliage, not 

 parasitic. 



* Corolla plicate at the sinuses and the plaits dextrorsely convolute : cotyledons broad, 

 often emarginate. 



2. IPOMGEA. Style undivided, terminated by a single capitate or 2-3-globose stigma. 

 Corolla from salverform or funnelform to nearly campanulate. Ca.psule globular, 40- (or 

 by abortion fewer-) seeded, 2-4-valved. 



3. JACQUEMONTIA. Style undivided : stigmas 2, ovate or oblong, thick but somewhat 

 flattened. Otherwise as Ipomoea and Convolvulus, and intermediate between the two. 



4. CONVOLVULUS. Style undivided or 2-clef t only at the apex : stigmas 2, from linear- 

 filiform to subulate or ovate, when broad sometimes flattish. Stamens included. Corolla 

 from funnelform to campanulate. Capsule globose, 2-celled, or sometimes imperfectly 

 4-celled by spurious partitions between the two seeds, or by abortion 1-celled, mostly 

 2-4-valved. 



5. BRE WERIA. Style 2-clef t or 2-parted ; the divisions simple, each bearing a capitate 

 stigma. Corolla, stamens, and capsule of Convolvulus. 



6. E VOLVULUS. Styles 2, distinct or sometimes united below, each 2-clef t : stigmas 

 linear-filiform or somewhat clavate. Corolla from funnelform to almost rotate. Otherwise 

 like Convolvulus on a small scale, not twining. 



* * Corolla not plicate in the bud, 5-cleft : cotyledons linear, biplicate, entire. 



7. CRESSA. Styles 2, distinct, entire : stigmas capitate. Calyx of 5 nearly equal sepals, 

 equalling the oblong-campanulate tube of the corolla ; the limb of the latter 5-parted into 

 oblong-ovate lobes, lightly convolute-imbricate and somewhat induplicate in the bud. 

 Filaments filiform, exserted from the throat of the corolla. Ovary 2-celled, 4 ovuled. 

 Capsule by abortion often 1-seeded. Stems not twining. 



TRIBE III. CUSCUTE^E. Ovary entire. Leafless parasitic twining herbs, destitute 

 of foliage and of all green color ; the spirally coiled filiform embryo even destitute 

 of cotyledons. Corolla imbricated in the bud, appeudaged below the stamens. 



8. CUSCUTA. The only genus. 



1. DICHONDRA, Forst. (Formed of 34% double, and pyfyo?, grain or 

 roundish mass, from the twin fruit.) Small prostrate and creeping perennials 

 (found almost all round the warmer parts of the world, but most in America) ; 

 with filiform stems, slender petioles to the reniform or round-cordate entire leaves, 

 and naked peduncles bearing a single small flower. Corolla greenish or yellowish- 

 white. Carpels pubescent. Char. Gen. 3U, t. 20. The following maybe the 

 only species. 



D. repens, Forst. Soft-pubescent or slightly sericeous, but green or greenish : leaves 

 mostly with a deep basal sinus : sepals obtuse, at length obovate with narrowed base or 

 spatulate: corolla-lobes ovate, nearly glabrous. Lam. III. t. 183; Smith, Ic. Ined. t. 8. 

 D. sericea, Swartz, Prodr. 54, & Fl. Ind. Occ. t. 11, a small and silky form. D. Carolinensis, 

 Michx. Fl. i. 130, a large and greener form. D. repens, macrocalyx, & sericea, Meissn. in Mart. 

 Fl. Bras. vii. 357. Wet ground, Virginia to Texas, near the coast, and Arizona. (Trop. 

 & S. Am., Asia, Oceanica, Australia, S. Africa.) 



D. argentea, W^illd. Canescently sericeous and silvery : leaves mostly with a shallow 

 sinus or even truncate, and with comparatively short petioles : sepals from oblong-oval to 

 lanceolate : corolla-lobes oblong-lanceolate, acutish, villous outside. Hort. Berol. 297, 

 t. 81 ; Meissn. 1. c. S. Texas to Arizona. (Mex., S. Amer.) 



2. IPOMC&A, L. MORNING GLORY. (According to Linnaeus, composed 

 of t'u>, Inog, and opoios, like ; but t\l) is a worm.) A large genus, mainly of 

 twining herbs, some prostrate, diffuse, or even erect : fl. summer. Calyx not 

 bracteate at base, but the outer sepals commonly larger. Limb of the corolla 

 entire or barely 5-angulate, or slightly 5-lobed. Valves of the capsule usually 

 septifragal. Cotyledons broad, commonly 2-lobed. Genus here taken in the 



