40 -  Muhlenbergia, Volume 3 
Ipomoea divergens 
Related to 7. leptoloma and of about the same size and 
habit. Leaf segments much broader, sinuately toothed or even 
lobed, only the lateral segments of the blades sometimes entire, 
all rounded or obtuse at the ends; sepals more acuminate than 
in J. leptoloma, glabrous: the petioles usually longer than the 
middle segment of the leaf blades. 
Mexico: Guayamas, Sonora, Palmer (no. 231) 1887. Type 
in the herbarium of the U. S. National Museum. 
Ipomoea spirale 
Related to 7. Wrightiz A. Gray, from which it differs chiefly 
in its long tendril-like peduncles, a feature which so far as I am 
awate has not previously been noted in this genus. 
Annual, slender, glabrous and climbing: leaf blades divided 
into 5 narrowly lanceolate or linear-lanceolate segments, these 
entire, I-2.5cm. long; petioles shorter than the middle segment: 
peduncles exceeding the subtending leaves, 4-8cm. long, fili- 
form, spirally twisted or tendril-like in the middle and used in 
climbing, 1-2 flowered, the pedicel portion 3-4mm. long and 
slightly thickened: sepals unequal, oblong, the outer shorter, 
about 4mm. long, verrucose, the inner 5-6mm. long: corolla 
10-14mm. long, cream-colored with a purple throat, the limb 
5-angled, 8-1o mm. broad. 
Mexico: Jaqui river, Palmer (no. 24), 1864. Type in the 
herbarium of the U. S. National Museum. 
Ipomoea valida 
Related to 1. pedatisecta Mart. & Gal., but distinguished 
from that species chiefly by the larger corolla with a much 
longer and more slender tube and the broader leaf segments. 
Annual, glabrous, slender and twining, 10-30 cm. long: leaf 
blades 5-9 divided, the segments oblanceolate, blunt, 1-3 em. 
long, separated nearly to the petiole: peduncles exceeding the 
subtending petioles, 3-4 cm. long, usually 1-flowered, the pedicel 
portion 15-20mm. long: sepals unequal, inner ones longer, 
