146 House: NortTH AMERICAN CONVOLVULACEAE 
Calycobolus spectabilis (Meissn.) 
Prevostea spectabilis Meissn. in Mart: Fl. Bras. '7: 325. 1869. 
Calycobolus umbellatus (Choisy) 
Prevostea umbellatus Choisy, Ann. Sci. Nat. 4: 496. 1825. 
2. BONAMIA Pet. Thouars, Hist. Veg. Afr. 1: 17, 32. 
pl. 5. 1804 —J. St. Hil. Expos. Fam. 2: 349. 1805. 
Stout, spreading, herbaceous or sometimes woody or twining 
lants. Leaves herbaceous or subcoriaceous, rarely cordate. 
Sepals leathery or coriaceous, equal or nearly so, usually obtuse 
or rounded. Corolla large or medium-sized, white or blue, hirsute 
without on the plicae, the limb subentire. Filaments glandular- 
villous below. Ovary 2-celled, 4-ovuled. Style bifid nearly to 
the base, the divisions unequal; stigmas 2, globose. Capsules 
chartaceous, 4-valved. Seeds smooth, or pubescent on the dorsal 
angles. 
Type species: Bonamia alternifolia J. St. Hil. 
Breweria R. Br. Prodr. 1: 487. 1810. 
Trichantha Karst. & Triana, Linnaea 28: 437. 1856. 
About 30 species, chiefly in the tropics of the old world. 
Key to the North American species 
Sepals about 12 mm. long. ‘Southwestern U. S, 1. B. ovalifolia. 
Sepals 20 mm. long or longer; corolla 9-10 cm. long. Floridian. 2. &. grandiflora. 
1. BONAMIA OVALIFOLIA (Torr.) Hallier f. Bot. Jahrb. 16: 528. 
1893 
Evolvulus ovalifolia Torr. Bot. Mex. Bound. 150. 18 59. 
Breweria ovalifolia A. Gray, Syn. Fl. N. Am. 2: 217. 1878. 
TYPE LocaLity: Mexican side of the Rio Grande below San 
Carlos. 
DistripuTion: Arid regions of the Mexican boundary, Texas 
to New Mexico. 
2: BONAMIA GRANDIFLORA (A. Gray) Hallier f. Bull. Herb. Boiss. 
5: 810. 1897 
Breweria grandifiora A. Gray, Proc. Am. Acad. 15: 49. 1880. 
Type Locatity: Manatee and Sarasota, Florida. 
DistrisuTion: In sandy soil, Florida. 
