498 House: North American Convolvulaceae 



Type locality : St. Croix. 



Distribution : Lesser Antilles (St. Croix, St. Thomas, Santa 



Cruz and Tobago), Venezuela, Guiana, and Brazil. 



3. Operculina leptoptera Urban, Symb, Ant. 3 : 342. 1902 

 Type locality : Hateurs des Trois Islets, Pere Ditss 426 (type). 



1 



4. Operculina ventricosa (Bert.) Peter, in Engl. & Prantl, Nat. 



Pfl. 4 3a : 32. 1 891 



Convolvulus ventricosus Bert, in Colla, Hort. Ripul. 37. 1824. 



Not C. ventricosus S. Manso, 1836. 



Ipomoea ventricosa G. Don, Gen. Syst. 4: 274. 1838. — Choisy, 

 in DC. Prodr. 9: 360. 1845. 



Type locality : St. Bartholomew. 



Distribution : Lesser Antilles ; Martinique, Antigua ; French 

 and Swedish Islands ; Guadeloupe, St. Bartholomew, etc. 

 Illustrations: Jacq. Vind. 3: pL 6g. 



5. Operculina rhodocalyx (A. Gray) 



Ipomoea rhodocalyx A. Gray, Proc. Am. Acad. 22 : 439. 1887. 

 Type locality : "At base of hills, Tequila, Jalisco [Mexico], 

 Palmer No. 421, 1886" (type). 



6. Operculina rubicunda nom. nov. 



Ipomoea alata J. N. Rose, Contr. Nat. Herb. 1: 108. 1891. 

 Not /; alata R. Br. 18 10; nor /. alata G. Don, 1838. Not 

 Operculina alata (Ham.) Urban. 



Similar in habit to 0. alatipes and 0. rhodocalyx. Leaf-blades 

 thin, triangular-ovate, 3-8 cm. long, shallowly cordate, entire, 

 acuminate ; petioles shorter than the blades : peduncles exceeding 

 the subtending petioles, broadly 2-winged below the middle, 1-3- 

 flowered ; pedicels 1.5-2 cm. long, clavately thickened and angled, 

 somewhat deciduous in fruit : sepals membranaceous, acute, 2.5 

 cm. long, the outer ones more or less tinged with brick-red : 

 corolla subsalverform, scarlet, the tube about 5 cm. long and 1 

 cm. in diameter, the limb 2.5-3 cm - broad, the spirally twisted 

 anthers equaling the tube or barely protruding : capsules globose, 

 1.5 cm. in diameter, 2-celled, 4-seeded ; seeds black, glabrous, 6 

 by 8 mm. 



Sonora : Alamos, Dr. E. Palmer 706, Sept. 16-20, 1890, type, 

 n the National Herbarium. 



