Bretoeria. CONVOLVULACE^. 217 



corolla white or tinged with rose, half inch long, the angles salient-acuminate. — Synib. 

 iii. 23 (1790). C. Bonariensis & C. dissectus, Cav. Ic. v. t. 480 (179!)). C. e(itutans, Benth. fl. 

 Hartw. 16. C. hastutus, Nutt. in Trans. Am. Phil. Soc. ser. 2, v. 194. C. lubatus, Engelm. & 

 Gray, PI. Lindh. i. 44. C. glaucifoUus, Choisy in DC. Prodr. ix. 412, but probably not Ipomasa 

 glaucifolia, L., viz. Dill. Elth. t. 87, fig. 101, which is "glaucous and glabrous." — Dry 

 prairies and hills, Arkansas and S. Colorado to Texas and Arizona. (Mex., Extra-trop. 

 S. Amer.) 

 * * Erect and much branched feebly twining perennial, glabrous throughout, small-leaved. 

 C. longipes, ^Tatson. Stems slender, loosely much branched, a foot to a yard high : 

 leaves mostly linear-hastate, short-petioled (an inch or two long, a line or two wide), 

 thickish, veinless, entire, cuspidate-mucronate, the ujsper gradually reduced to linear- 

 subulate bracts ; these on the 1-flowered peduncles mostly alternate : sepals ovate, obtuse, 

 often mucronulate, the outer shorter : corolla fully an inch long, broadly f unnelform, 

 glabrous throughout, white or cream-color: stigmas very narrowly linear: seeds globular, 

 minutely tuberculate. — Am. Naturalist, vii. 302; Gray, Bot. Calif, i. 5.34; Rothrock in 

 Wheeler Kep. t. 20. — Arid desert region, S. Nevada and S. E. California, Lieut. Wheeler, 

 Dr. Horn, Palmer. 



5. B!RE"WERIA, R. Br. (Samuel Brewer, an English Botanist oi- ama- 

 teur of the 18th century.) — Chiefly j^erennial herbs, some suffruticose, of the 

 warmer parts of the world, resembling Ipomcea and Convolvulus ; with simple 

 entire and usually short-petioled leaves, and the corolla mostly silky-pubescent or 

 silky-hirsute outside in the bud, with angulate or obscurely lobed border: fl. 

 summer and autumn. — Prodr. 487; Bentli. & Hook. Gen. ii. 877. Sft/lisma, 

 Raf. in Ann. Sci. Phys. viii. 268 ; Choisy in DC. Prodr. ix. 450. Bunamia, 

 Gray, Proc. Am. Acad. v. 336, & Man. ed. 5, 376, not Thouars, in which the 

 corolla is lobed and not plicate. 



* Procumbent: peduncles very short and 1-flowered : capsule large : seed glabrous. 

 B. OValifolia. Sericeous-canescent : leaves ovate or oval, mostly subcordate, an inch 



long : style 2-cleft above the middle : capsule globose, half inch in diameter, about the 



length of the broadly ovate sepals, by abortion 1-seeded. — Evolvidiis? ovallfolius, Torr. Bot. 



Mex. Bound. 1-50. — S. W. borders of Texas, on the Rio Grande (the Mexican side) below 



San Carlos, Parnj. Corolla not seen. 



* * Procumbent slender perennials : peduncles slender and elongated, l-5-flo\vered : flowers small : 

 corolla almost campanulate: capsule small. — Styllsma, Raf., &c. 



B. humistrata. Sparsely pubescent or glabrate : leaves from elliptical and subcordate 

 to narrowly linear (an inch or two long), mucronate, and the broader emarginate : peduncles 

 1-7-flowered : bracts shorter than the pedicels : sepals glabrous or almost so, oblong-ovate, 

 acuminate: corolla white, half inch long; filaments hairy: styles united at base. — Co«- 

 volvalus humistratus, Walt. Car. 94. C. patens, Desr. in Lam. Diet. iii. 547. C. trirhosnnthes, 

 Michx. Fl. i. 137, partly. C. Sherardi, Pursh, Fl. ii. 730 ? C. tenellus, Lam. 111. i. 4-59 ; 

 Ell. Sk. i. 250. Erolvidus ? Shernrdi, Choisy. Sfi/Iisma evolmhides, Choisy, 1. c, in part. 

 S. humistrata, Chapm. Fl. 346. Bonamia humistrata. Gray, Man. ed. 5, 376. — Dry pine bar- 

 rens, Virginia to Louisiana. 



B. aquatica. Soft-pubescent or cinereous-tomentulose : leaves from elliptical to subcor- 

 date-lanceolate, very obtuse, seldom over an inch long : peduncles 1-3-flowered : sepals 

 strongly sericeous-pubescent, acute or acuminate : corolla rose-purple : filaments glabrous : 

 styles distinct nearly to base. — Convolvulus aquaticus, Walt. 1. c. ; Ell. 1. c. C. trichosanthes, 

 Michx. 1. c, partly. C. erianthus, Willd. in Spreng. Syst. i. 610. Stijlisma aquatica, Chapm. 

 1. c. Bonamia aquatica. Gray, 1. c. — Wet pine barrens and margin of ponds. North Carolina 

 to Texas. 



B. Pickeringii. Pubescent, or the leaves glabrate : these from narrowly spatulate- 

 linear with acute and subsessile base to filiform-linear : peduncles seldom surpassing the 

 leaves, 1— 3-flowered : bracts foliaceous and exceeding the flowers : sepals villous-sericeous, 

 ovate, obtuse, half the length of the ovate-conoidal capsule : corolla white, a third of 



