HOUSE, THE GENUS IPO MCE A 
195 
26. Xpomoga laeta A. Gray, Proc. Amer. Acad. 22: 439. 1887. 
Stems densely and softly pubescent; leaf-blades suborbicular, 3-5 cm. long, 
deeply 3-lobed, deeply cordate, lobes contracted below and the blade sometimes 
sub-5-lobed; peduncles about as long as the petioles; sepals oblong-ovate, acute, 
hirsute, rounded at the broad base, 2 cm. long; corolla 9-10 cm. long, pubescent 
without, pink-purple. 
Type locality : Rio Blanco, Jalisco, Mexico. 
Distribution: Trailing among grasses and low plants. Jalisco. 
Specimens examined: Palmer 341, 1886 (type — G, N, C). Hills near 
Guadalajara. Pringle 4456, 1893 (G, N, C). 
27. Ipomcea oreophila sp. nov. 
Low and feebly twining, about 1 m. long from a woody root; stems and foliage 
glabrous or minutely pubescent; leaf-blades ovate-hastate or triangular-ovate, 
entire except for the spreading basal auricles which are 1-2-lobed or toothed; blades 
3-5 cm. long, 2-4 cm. wide; peduncles slightly longer than the petioles; pedicels 
less than 1 cm. long; outer sepals similar to the leaf-blades in shape, pubescent, 
subherbaceous, triangular-ovate, hastate or subcordate, acute, 10-12 mm. long; 
corolla funnelform, 6 cm. long, the limb blue, the tube white below. 
Mexico: Hidalgo; Rocky hills, Lena Station, 8300 ft. alt. Pringle 
10034, 24 Aug., 1905 (type — G, Y). Chiapas; Near San Cristobal, E. W. 
Nelson 3149, 1895 {233090 — N, G). Valley of Mexico; Mt. Zocoalco, 
Guadeloupe, Borgeau 728 & 797, 1866 (G). 
28. Ipomcea lindheimeri A. Gray, Syn. FI. N. Am. 21: 210. 1878. 
Ipomcea heterophylla Torr. Bot. Mex. Bound. 149. 1859. Not I. heterophylla Ortega. 
1800. 
Pharbitis lindheimeri Small, FI. Southeastern U. S. 964. 1903. 
Foliage finely but densely appressed pubescent; leaf-blades deeply 3- to 5-lobed, 
the middle lobe with a contracted basal portion longer than the expanded part, 
lateral lobes similar; sepals linear-lanceolate, 2-2.5 cm. long; corolla 6-9 cm. long. 
Type locality: Valley of the Rio Grande, below Donana. 
Distribution: Hills and prairies, Texas to New Mexico, and northern 
Mexico. 
Specimens examined: Western Texas; Wright 508, 990; Schott, 1851; 
Jermy 185; Harvard, 1881; F. Tweedy 170; Reverchon 654; Comache 
Sprin g, Lindheimer 1031, 1851; Heller 1776; Bray 18; Earle & Tracy 150; 
Stanfield, 1896. New Mexico: Wright 1613. Coahuila; Palmer 906, 1880. 
Chihuahua; Pringle 1339, 1887; Townsend & Barber 220, 1899. 
