House: North American Convolvulaceae 99 



i. Exogonium racemosum (Poir.) Choisy, Conv. Rar. 128. 



1816. 



l8 37- — In DC. Prodr. 9: 346. 1845 

 Ipomoea racemosa Poir. in Lam. Encyc. Suppl. 4: 65^. 

 Convolvulus racemosus Spreng. Syst. 1 : 600. 1825. 

 Convolvulus altissimtts Spreng. /. c. 613, 

 Ipomoea altissima Bert. ; G. Don, Gen. Syst. 4: 273. 1838. 



A stout, woody, perennial, branching vine, several m. long, 

 finely pubescent : leaf-blades oblong-ovate, deeply cordate, obtuse, 

 3-6 cm. long ; petioles 1-3 cm. long : peduncles racemosely 2-10- 

 flowered, 6-10 cm. long, each calyx closely subtended by 2-3 

 elliptical-oblong, obtuse, rose-colored bracts : sepals membranace- 

 ous, similar to the bracts: corolla lavender, about 4.5 cm. long, 

 the cylindrical tube slightly constricted above. (Plate i, figure 



Type locality : St. Domingo. 



Distribution : St. Domingo and Hayti. Reported from Cuba. 

 Specimens examined : Hayti, La Brande to Mt. Balance, Nash 

 & Taylor 1696, 1905. 



2. Exogonium Wrightii sp. nov. 



Ipomoea racemosa Griseb. Cat. PI. Cub. 205. 1866. Not /. race- 

 mosa Poir. 1 8 16. 



A stout, woody, perennial, twining vine : stems appressed- 

 pubescent above : leaf-blades ovate, obtuse, deeply cordate, 5-8 

 c m. long, glabrate above, densely appressed-pubescent beneath, 

 strongly reticulate-veined : peduncles elongated, often terminating 

 branches and leafy, 10-20 cm. long, several-flowered; pedicels 

 filiform, 2-4 cm. long; bracts linear-lanceolate, 1.5-2 cm. long, 

 Pubescent: sepals lanceolate, acuminate, appressed-pubescent 

 below, 18-22 mm. long : corolla reddish-purple, salverform, 4 cm. 

 lon g, the limb as broad: stamens and style exserted 6-10 mm. 



(Plate i, figure d.) 



Cuba: "N. Sophie [Isle of Pines], climbing to tops of tall 



Wright_i6to, 1 8 59-1 860. (Type in the Gray Her- 



3. Exogonium 



Ipomoea bracteata Rudol. ; 



J 



2 92. 1807. Not /. bracteata Cav. 1799- 



£ 



Iphii Roem. & Schult. Syst. 4: 222. 18 19. 



)C. Prodr. 9: 344- l8 45- 

 Jahrb. 18: 158. i894- 



