258 ANNALS NEW YORK ACADEMY OF SCIENCES 



Y); 7241, 1896 (G); 13779, 1906 (G). Beam 59, 1900 (G). Oaxaca: 

 Conzatti & Gonzalez 505, 1897; 968, 1895 (G); Pringle 5677, 1894 (G). 



^ 168. Ipomcea cardiophylla A. Gray, S}ti. F1. N. Am. 2*: 213. 1878. 



Glabrous; leaf-blades ovate, hastate-cordate, 5-8 cm. long, thin; sepals ovate, 

 acute, green with white scarious margins, 4-5 mm. long; corolla blue with a white 

 tube 2-3 cm. long; capsules ovoid. 



Type locality: Near El Paso, Texas. 



Distribution: Rocky places, western Texas to Arizona and northern 

 Mexico, south to Oaxaca. 



Specimens examined: Texas; C.Wright 511 (t}^e — G). Chihuahua; 

 Pringle 617, 1885 (G). Coahuila; Palmer 904, 1880, (G, N). Oaxaca; 

 Rev. L. C. Smith 847, 1895 (G); Gonzalez & Conzatti 898, 1898 (G). 



169. Ipomcea perlonga Robinson, Proc. Am. Acad. 29: 319. 1894. 



Young foliage minutely silvery-pubescent, stems with or without prickles; 

 leaf-blades orbicular-ovate, cordate, acute, 3-10 cm. broad, more or less strigillose- 

 pubescent, paler beneath; peduncles 15-30 cm. long, 5- to 15-flowered; pedicels 

 slightly thickened and deflexed in fruit, 6-15 mm. long; sepals 4 mm. long, obtuse; 

 corolla 4 cm. long, minutely pubescent without on the plicae. 



Type locality: Tequila, Mexico. 



Distribution: Lov/er California and western Mexico to Central 

 America. 



Specimens examined: Tequila, Palmer 4519, 1893 (tj^e — G, N, C). 



170. Ipomcea parasitica (H. B. K.) G. Don, Gen. Syst. 4: 275. 1838. 



Convolvulus parasiticus H. B. K. Nov. Gen. & Sp. 3: 103. 1819. 

 Convolvulus circinnatus Willd.; Roem. & Schult. Syst. 4: 302. 1819. 



Stems glabrous or finely pubescent in lines, with a few weak recurved prickles; 

 leaf-blades orbicular-ovate, 6-8 cm. long, the apex often acuminate, minutely pubes- 

 cent above, less so beneath; peduncles shorter than the petioles 5- to 9-flowered; 

 sepals 4-5 mm. long, outer ones subacute and minutely cuspidate, pubescent, inner 

 ones rounded; corolla silvery-canescent in bud, about 3 cm. long, pubescent without 

 on the tube. 



Type locality: Near Caracas, Venezuela. 



Distribution: Southern Mexico to Venezuela. 



Specimens examined: Costa Rica; Nicoya, Tonduz 13679, 1900 (Y). 

 San Jose, Tonduz 1561, 1893 (G). Guatemala; Santa Rosa, Heyde & 

 Lux. (J. Donnell Smith 4024), 1892 (G). 



