CONVOLVULACEAE 959 



2. Breweria angustifolia Nash. Foliage more or less densely pubescent. .Stems 

 much branched at the base, the branches trailing or reclining, 6-10 dm. long, sparingly 

 branched above : leaf-blades narrowly linear, 2.5-7 cm. long, often glabrate, acute, entire, 

 sessile or short-petioled : peduncles slender, about as long as the blades or shorter : sepals 

 glabrous or nearly so, oblong-lanceolate to elliptic, 7-10 mm. long, ciliate, acute to acumi- 

 nate, with more or less spreading tips : corolla white, about 2 cm. broad : capsules oval 

 or oblong-oval, 6-8 mm. long, bearded at the apex. 



In dry soil, peninsular Florida. 



3. Breweria humistrata (Walt.) A. Gray. Foliage villous-hirsute, or glabrate. 

 Stems often branching at the base ; branches trailing or climbing, 3-15 dm. long, some- 

 times sparingly branched : leaf-blades oblong or nearly so, 2-7 cm. long, apiculate, entire, 

 truncate or cordate at the base; petioles 2-8 mm. long: peduncles very slender, 3-8 cm. 

 long : sepals glabrous or nearly so, oblong or oblong-lanceolate, 5-7 mm. long, acute or 

 acuminate : corolla white or pinkish, fully 2 cm. broad : capsules 4-5 mm. long. 



In sandy soil, Virginia to Florida and Louisiana. 



4. Bre"weria trichosAnthes (Michx. ) Small. Foliage finely pubescent. Stems 

 branched at the base ; branches prostrate or reclining, slender : leaf-blades oblong-linear, 

 1-4 cm. long, apiculate or mucronate, entire, often somewhat viscid, narrowed into short 

 petioles : peduncles as long as the leaves or longer : sepals strigillose, glabrate, oblong or 

 nearly so, 6-8 mm. long, more or less acuminate : corolla white, 1.5-2 cm. broad : cap- 

 sules about 5 mm. long, bearded at the apex. \_ConvoIvulus trichosaiithes Michx.] 



In sandy soil, Korth Carolina to Florida and Alabama. 



5. Breweria villosa Nash. Foliage villous-tomentulose. Stems usually branched at 

 the base ; branches trailing, 3-14 dm. long, branched: leaf-blades oblong or linear, 2.5-7 

 cm. long, apiculate, entii'e, rather abruptly narrowed or subcordate at the base ; petioles 

 2-8 mm. long : peduncles as long as the leaves or surpassing them : sepals villous-tomen- 

 tulose, oblong to ovate-lanceolate, 8-11 mm. long, acuminate : corolla white, 2.5-3 cm. 

 broad : capsules ovoid or globose-ovoid, 6-7 mm. long, closely pubescent. 



In dry sand, peninsular Florida. 



6. Breweria aqu^tica (Walt.) A. Gray. Foliage softly pubescent, or tomentulose. 

 Stems branched at the base ; branches trailing or rarely climbing, 5-12 dm. long, commonly 

 branched : leaf -blades oblong to narrowly lanceolate, 1-2.5 cm. long, apiculate, entire, 

 prominently nerved beneath, obtuse or cordate at the base : peduncles as long as the leaves 

 •or longer : sepals silky-tomentose, acuminate, 5-6 mm. long : corolla rose-purple, fully 

 1.5 cm. broad : filaments glabrous : capsules 8-9 mm. long, pubescent, at least near the 

 top. 



In pine lands, A'irginia to Florida and Texas. 



7. Brew^eria Pickeringil (M. A. Curtis) A. Gray. Foliage more or less densely 

 pubescent. Stems commonly branched at the base ; branches prostrate or reclining, with 

 many short spreading branchlets : leaf-blades linear-spatulate to narrowly linear, 2-6 cm. 

 long, acute, entire, narrowed into short petioles or nearly sessile : peduncles shorter than 

 the leaves or longer : bracts linear, surpassing the calyxes : sepals lanuginose, oval or ellip- 

 tic-oval, 4-5 mm. long : corolla white, 1-1.5 cm. broad : capsules ovoid-conic, 6-8 mm. 

 long, pubescent. 



In pine lands, Xew .Jersey and Illinois, south to Florida and Texas. 



2. CRESSA L. 



Perennial shrubby plants, with sparingly or diffusely branched stems. Leaves alter- 

 nate : blades small or reduced to scales. Flowers solitary in the upper axils. Calyx ses- 

 sile or short-pedicelled : sepals nearly equal and distinct, imbricated, unchanged at 

 maturity. Corolla funnelform, persistent : lobes 5, about as long as the tube. Stamens 

 5, exserted : filaments filiform. Ovary more or less perfectly 2-celled. Styles distinct. 

 Ovules 2 in each cavity. Capsules little longer than thick, 2-4-valved. Seeds smooth 

 and shining, often solitary. 



Leaves not scale-like, numerous : filaments glabrous : corolla-lobes lanceolate. 1. C. Truxil/rnsis. 



Leaves reduced to a few scales : filaments pubescent below: corolla-lobes ovate. 2. C. aphylla. 



1. Cressa Truxillensis H.B.K. Foliage silky. Stems much branched at the base; 

 branches copiously leafy, spreading or prostrate, 5-25 cm. long : leaves numerous ; blades 

 elliptic, oblong or elliptic-lanceolate, 3-9 mm. long, acute, entire, sessile or nearly so : 

 pedicels much shorter than the leaves : sepals longer than the pedicels, oblong to oval or 

 slightly broadest above the middle, 4-5 mm. long, obtuse : corolla white ; tube about as 



