100 House : North American Convolvulaceae 



Resembling the preceding : stems retrorsely strigose-pubes- 

 cent : leaf-blades deltoid-ovate, cordate, entire or somewhat 3- 

 lobed, glabrous above, pubescent beneath : peduncles i- or loosely 

 few-flowered ; bracts ovate, obtuse : sepals herbaceous, similar to 

 the bracts but smaller, sometimes acute, i cm. long or less : corolla 

 subsalverform, scarlet, 3-4 cm. long; limb 2.5-3 cm. broad: sta- 

 mens and style exserted. (Plate i, figure a.) 



Type locality : St. Domingo. 



Distribution : St. Domingo and Cuba. 



Specimens examined : Cuba, C. Wi'ight jog6 {\n herb. Gray). 



4. Exogonium velutifolium sp. nov. 



A slender, woody, high-climbing, irregular vine : stems vel- 

 vety-pubescent above : leaf-blades oblong-ovate, obtuse, rounded 

 at the base, entire or irregularly crenate-lobed toward the base, 

 6-30 mm. long, velvety-pubescent; petioles 2-5 mm. long: flowers 

 2 or 3 together, sessile or nearly so near the ends of the branches ; 

 bracts and sepals linear-lanceolate : sepals subequal, acuminate, 

 7—8 mm. long, tomentose : corolla crimson, glabrous, 3 cm. long 

 or less, slightly constricted at the throat, the slightly spreading 

 limb with 5 rounded lobes, 5-6 mm. long and as broad : stamens 

 and style protruding. (Plate i, figure /;.) 



Mexico : Oaxaca, west side of the valley of Cuicatlan, 2000— 

 4000 ft. alt., E. W. Nclsoji iSSy, Nov. 9, 1894 (type in herb. Gray ; 

 dupl. in Nat. Herb.). 



5. Exogonium bracteatum (Cav.) Choisy ; G. Don, Gen. Syst. 4 : 



264. 1838 



Ipomoea bracteata Cav. Ic 5 : 51. //. 447. 1799- 

 Ipomoea spicata H. B. K. Nov. Gen. et Sp. 3 : 112. 1819. 

 Ipomoea cincta Roem. & Schult. Syst. 4: 254. 18 19. 

 Comwhnilus obvallatiis Spreng. Syst. i : 595. 1825. 

 Exogonium spicatum Choisy, Conv. Rar. 128. 1837. — In DC. 



Prodr. 9: 347. 1854. 

 Exogoniuvi Olivae Barcena, Viaje Cav. Cacahuam. 29. 1874. 

 Convohmlns bractiflorns Sesse & Moc. PI. Nov. Hisp. 23. 1887. 



Type locality : Near Mazatlan, Mexico. 



Distribution : Lower California and western Mexico to Cen- 

 tral America. 



Specimens examined: Sonovdi, Palmer jrj, 1890, to, 1890; 

 Sinaloa, W. G. Wright 1258, 1899, Palmer ijSy, 1891, Lamb 450, 



