HOUSE , THE GENUS IPO MCE A 
261 
Type locality : Panama. 
Distribution: Southern Mexico to Colombia. 
Specimens examined: Chiapas: Between Hacienda Juncana and San 
Vicente, 4200-6000 ft. alt. E. W. Nelson 3499,1895 (252747 — N); Between 
San Cristobal and Teopisca, 6700-8500 ft. alt. E. W. Nelson 3479, 1895 
(N). Referred to I. morelii by description only. The above description 
applies to the specimens here cited which may not be I. morelii. 
Species Inquirendae. 
Ipomoea apiculata Mart. & Gal. in Bull, in Acad. Brux. XII. 2: 262. 1845.— 
Walp. Rep. 6: 534. 1847. 
aristulata Mart. & Gal. 1. c. 263. Walp. 1. c. 535. 
costaricensis Kuntze, Rev. Gen. 443. 1891. 
nematoloba Urban, Sym. Ant. 3: 349. 1902. 
karwinskiana Regal, Ind. Sem. Hort. Petrop. 1857: 46. 1858. 
lactescens Beuth. PI. Hartw. 120. 1843. 
pauciflora Mart. & Gal. 1. c. 266. 
proximum (Mart. & Gal.) Hemsley, Biol. Cent.-Am. Bot. 2: 392. 1882. 
{Calonyction 'proximum Mart. & Gal. 1. c. 268.) 
schiedeana Ham. in Lindl. Bot. Reg. Misc. 19. 1838. 
sericophyUa Peter, in Engl. & Prantl. Nat. Pflanzenfam. IV. 3a: 31. 1891. 
triflora Maria & Velasco, in La Naturaleza 2: 338. 1870. 
truncata Lem. Hort. Univ. 2: 33. PI. 49. 
walpersiana Duchass.; Urb. 1. c. 345. 
Species excludendae. 
Ipomoea cegyptia L. Sp. PI. 162. 1753.= Operculina segyptia House. 
alata Rose, Contr. U. S. Nat. Herb. 1: 108. 1891.= Operculina rubicunda 
House. 
alatipes Hook. Bot. Mag. pi. 5330. 1862.= Operculina alatipes House. 
alba L. Sp. PI. 161. 1753.= Calonyction album (L.) House. 
altissima (Spreng.) Bert.; G. Don, Gen. Syst. 4: 273. 1838.= Exogonium 
racemosum Choisy. 
alulata Miq. Linnaea 18: 599. 1844.= Operculina alata (Ham.) Urban. 
ampliata Choisy, DC. Prodr. 9: 361. 1845.= Operculina ampliata House. 
antilliana Millsp. Field. Col. Mus. Bot. 2: 84. 1900.= Turbina corymbosa 
(L.) Raf. 
arenaria Steud. Norn. ed. 2. 1: 815. 1841.= Exogonium arenarium Choisy. 
argentifolium A. Rich, in Sagra FI. Cub. 2: 131. 1850.= Exogonium. 
aurea Kellogg; Curran, Bull. Cal. Acad. 1: 143. 1885.= Operculina. 
bona-nox L. Sp. PI. ed. 2. 228. 1762.= Calonyction aculeatum (L) House. 
bracteata Cav. Ic. 5: 51. 1799.= Exogonium bracteatum Choisy; G. Don. 
bracteata Rud.; Ledeb. in Schrad. Neues Jour. Bot. 2: 292. 1807.= Exo¬ 
gonium. 
