House: North American Convolvulaceae iiJ» 



I. ExOGONiUM RACEMOSUM (Poir.) Clioisy, Conv. Rar. 128. 



1837. — In DC. Prodr. 9: 346. 1845 



Ipouioca raccDiosa Poir. in Lam. Encyc. Suppl. 4: 633. 1816. 



Convolvulus raceviosus Spreng. Syst. i : 600. 1825. 



Convolvulus altissinius Spreng. /. c. 613. 



Ipouioca altissinia Bert. ; G. Don, Gen. Sy.st. 4: 273. 1838. 



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

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

 3-6 cm. long ; petioles 1-3 crn. 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, NasJi 

 & Taylor i6g6, 1905. 



2. Exogonium Wrightii sp. nov. 



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

 niosa Poir. 18 16. 



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

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

 cm. 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. 

 long, 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 

 trees," C. Wright 16^0, 1 859-1 860. (Type in the Gray Her- 

 barium.) 



3. Exogonium Rudolphii (Roem. & Schult.) 



Ipouioca bractcata Rudol. ; Ledeb. in Schrad. Neues Jour. Bot. 2 : 



292. 1807. Not /. bractcata Cav. 1799. 

 Ipouioca Rudolphii Roem. & Schult. Syst. 4 : 222. 18 19. 

 Pharbitis bractcata Choisy in DC. Prodr. 9 : 344. 1845. 

 Rivca bractcata Hallier f. Bot. Jahrb. 18 : 158. 1894. 



