HOUSE, THE GENUS IPOMCEA 195 



26. Ipomcea 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 U56, 1893 (G, N, C). 



' 27. Ipomoea oreopMIa 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; 

 coroUa 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. Ipomoea lindheimeri A. Gray, Syn. Fl. N. Am. 21 : 210. 1878. 



Ipomoea heterophylla Torr. Bot. Mex. Bound. 149. 1859. Not /. heterophylla Ortega. 



1800. 

 Pharhitis lindheimeri Small, Fl. 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; SchoU, 1851; 

 Jermy 185; Harvard, 1881; F. Tweedy 170; Reverchon 654; Comache 

 ^^vmg, Lindheimer 1031, 1851; Heller 1776; Bray 18; Earle & Tracy 150; 

 Stanfield, 1896. New Me:!6co: Wright 1613. CoahuWa; Palmer 906, 1880. 

 Chihuahua; Pringle 1339, 1887; Townsend & Barber 220, 1899. 



