20 



CONVOLVULACEAE. 



[Vol. III. 



Ovary 2-divided, the carpels 2-ovuled; creeping herbs. 

 Ovary entire, 2-4-celled; style simple, cleft or divided. 

 Style 2-cleft or 2-divided. 

 Style 2-cleft or 2-parted. 



Style 2-divided to the ovary, each division 2-cleft. 

 Style entire up to the stigma. 



Stigma or stigmas capitate or globose. 



Corolla salverform; stamens and style exserted. 

 Corolla fuimelform or campanulate; stamens and style included. 

 Stigmas 2, filiform to oblong. 



1. Dichondra. 



2. Breweria. 



3. Evolvulus. 



4. Quamoclit. 



5. Ipomoea. 



6. Convolvulus. 



1776. 



i. DICHONDRA Forst. Char. Gen. PI. 39. pi. 40. 



Prostrate or creeping slender annual (sometimes perennial ?) silky-pubescent or glabrous 

 herbs, with nearly orbicular cordate or reniform petioled entire leaves, and very small soli- 

 tary axillary peduncled flowers. Sepals nearly equal, oblong or spatulate. Corolla open- 

 campanulate, deeply 5-lobcd, the lobes induplicate in the bud. Stamens shorter than the 

 corolla; filaments filiform. Ovary villous, deeply 2-parted, each lobe 2-celled; styles 2, sim- 

 ple, arising from the bases of the ovary-lobes; stigmas capitate. Fruit of 2 pubescent 2- 

 valved or indehiscent 1-2-seeded capsules. [Greek, 

 two-grained, referring to the capsules.] 



About 5 species, natives of warm and tropical regions. 

 Besides the following, another occurs in the southwest. 



i. Dichondra evolvulacea (Iy. f. ) Britton. 

 Dichondra. (Fig. 2938.) 



Sibthorpia evolvulacea 1,. Suppl. 288. 1781. 

 Dichondra repens Forst. Fl. Inst. Aust. Prodr. 2. 1786. 

 D. evolvulacea Britton, Mem. Torr. Club, 5: 268. 1849. 



Somewhat pubescent, or glabrous ; stems almost 

 filiform, creeping, rooting at the nodes, d'-2 long. 

 Leaves orbicular to reniform, deeply cordate, x /i'-\Yz' 

 in diameter, palmately veined; petiole often much 

 longer than the blade; flowers i // -2 // broad; peduncles 

 filiform; sepals obtuse, spatulate or obovate; corolla 

 yellow to white, shorter than the sepals, its lobes ovate 

 to oblong; capsule 1" high or less. 



In moist or wet places, Virginia to Texas and Mexico, 

 near the coast. Widely distributed in South America and 

 in the Old World, especially in the southern hemisphere. 



2. BREWERIA R. Br. Prodr. Fl. Nov. Holl. I: 487. 18 10. 



Herbs, mostly perennial and procumbent, with entire short-petioled or sessile leaves, and 

 1-5-flowered axillary peduncles; flowers white, purple, pink, or yellow. Sepals acute or 

 obtuse. Corolla campanulate or funnelform-campanulate; limb plaited, 5-angled or slightly 

 5-lobed. Stamens included; filaments filiform, or dilated at the base. Ovary 2-celled; 

 style 2-cleft or 2-parted; stigmas capitate. Capsule globose to ovoid, 2-celled, 2-4-valved. 

 Seeds 1-4, glabrous or pubescent. [Named for Samuel Brewer, a correspondent of Dillen.] 



About 30 species, widely distributed in warm-temperate and tropical regions. Besides the 

 following, 2 or 3 others occur in Florida and 1 in Texas. 

 Sepals acute or acuminate; leaves oblong, elliptic or linear. 



Corolla white; filaments pubescent; plant pubescent or puberulent. 1. B. humistrata. 



Corolla purple; filaments glabrous; plant silky-tomentose. 2. B. aquatica. 



Sepals obtuse; leaves narrowly linear. 3. B. Pickeringii. 



I. Breweria humistrata (Walt.) A. Gray. 

 Southern Breweria. (Fig. 2939.) 



Convolvulus humistratus Walt. Fl. Car. 94. 1788. 

 Stylisma humistrata Chapm. Fl. S. States, 346. i860. 

 Bonamia humistrata A. Gray, Man. Ed. 5, 376. 1867. 

 ^^JS // Breweria humistrata A. Gray, Syn. Fl. 2: Part 1, 217. 1S78. 



Pubescent or puberulent; stems slender, i-2 long, 

 simple, or with a few long branches. Leaves elliptic, 

 oblong-elliptic, or ovate-oblong, obtuse and mu- 

 cronulate or some of them emarginate at the apex, 

 subcordate, rounded or narrowed at the base, JS^'-l/ 

 wide, i / -2 / long; petioles i // -3 // long; peduncles 

 slender, longer than the leaves, 1-7-flowered, minutely 

 bracted at the summit; sepals glabrous or puberulent, 

 oblong, acuminate, 2 // ~3 // long; corolla white, 6 // -8 // 

 long; filaments pubescent; style 2-cleft; capsule ovoid, 

 acute, glabrous, about as long as the calyx. 



In dry pine barrens, Virginia to Florida and Louisi- 

 ana. May-Aug. 



