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ANNALS NEW YORK ACADEMY OF SCIENCES 
2. Ipomosa petrophila House, Bot. Gaz. 43:401. 1907. 
Stems erect from a large root, pale and finely tomentulose above, 30-60 cm. 
high; leaf-blades lanceolate, 4-10 cm. long, 3-nerved and obtuse at the ends, finely 
sericeous pubescent beneath; sepals unequal, oblong, obtuse, the inner ones 8-11 mm. 
long; corolla white with a pale purple throat, 6-8 cm. long, glabrous; the peduncles 
1-3-flowered, 1-5 cm. long; capsules ovoid-conical, 14-16 mm. high, thick-walled. 
Type locality: Near Chihuahua, Mexico. 
Distribution: Rocky hills, northern Mexico. 
Specimens examined: Pringle 340, 1885 (type — N). Santa Eulalia 
plains, Wilkinson, 1885 (N). 
3. Ipomcea longifolia Benth. PI. Hartw. 16. 1839.— Small, FI. South¬ 
eastern U. S. 962. 1903. 
Convolvulus Schumardianus Torr. Bot. Marcy’s Rep. 291. 1853. 
Ipomoea Carletoni Holzinger, Contr. Nat. Herb. 1: 211. 1892. 
Convolvulus Queretanensis Sesse & Moc., FI. Nov. Hisp. in La Naturaleza II. 1: 27. 
1887.— FI. Mex. 1. c. II. 2: append. 36. 1893. 
Type locality: Mexico. 
Distribution: Prairies and plains, Oklahoma and Texas to Arizona 
and south in Mexico to Queretaro and Durango. 
Illustrations: Bot. Reg. pi. 21. Contr. Nat. Herb. 1: pi. 17. 
Specimens examined: Oklahoma: Carleton (N); Blankinship (G). 
New Mexico: Wright 1617, 1851. Arizona: Tourney 2580 (Y); Lemmon 
2834', Wilcox 375. Mexico: Durango, Palmer 229 (Y, N). Sonora: 
Thurber 710. Queretaro: Rose, Painter & Rose 9544 (N, Y); Hartweg 97 
(G). Chihuahua: Palmer 297. Aguas Calientes: E. W. Nelson 3887. 
4. Ipomoea stans Cav. Ic. 3:26. 1794.— Choisy in DC. Prodr. 9: 
355. 1845. 
Convolvulus stans H. B. K. Nov. Gen. & Sp. 3: 96. 1819. 
Convolvulus firmus Spreng. Syst. 1: 613. 1825. 
Convolvulus sinuatus Sesse & Moc., FI. Nov. Hisp. in La Naturaleza II. 1: 24. 1887. 
— FI. Mex. 1. c. II. 2: append. 38. 1893. 
Type locality: Matritense. 
Distribution: Northern and western Mexico. 
Illustrations: Cav. 1. c. pi. 250. Altamirano, Mat. Mex. pi. 282. 
Specimens examined from Coahuila, San Luis Potosi, Guanajuato, 
Hidalgo, Valley of Mexico, Orizaba and Oaxaca. 
