CONTRIBUTIONS TO WESTERN BOTANY 55 
Euphorbia bilobata Eng. has warty seeds in all forms 
Enphorbia longepetiolata .n sp. No. 27514a, La Bar- 
ranca, Guadalajara, Nov. 12 1930 end same loc. No. 27538 An- 
nuals, erect and widely branched, with long internodes and deepl y 
sulcate branches. Leaves opposite, 2-3 inches long, very thin, 1- 
nerved, entire, elliptical-lanceolate-acuminate, the blades 1-2 in- 
ches long, with petiole half as long and filiform. Flowers few, in 
the axils, white, petaloid appendages minute. Pods smooth and 
glaucous. Seeds about 1 mm, long, about oval, with 3 lines of 
transverse and quadrangular pits, black or olive-colored, acutish. 
waste places in fields, This is also like E, Francoaia Boiss. 
inflores:ence different. E, graminifolia is similar, 
Euphorbia tenuissima n. sp. No. 27514, La Bar- 
ranca, Guadalajara, Nov, 25 1930, Allied te E, subreniformis W 
reiiformis. About a foot high and openly branched, Seeds pec- 
d 
Many species at times have the stamens exserted and anthers 
didymous, with each lobe about spherical. 
uphorbia pseudoserpyllifolia Millsp. seems to be perennial 
At least all my speimens are slightly shrubby below. The seeds 
are narrowly oblong, acutish, reddish, deeply grooved longitudin- 
ally and without cross-wrinkles or warts, There is a large group 
branches. Leaves 2-3 inches long, thick, elliptical, sharply low- 
serrate as if glandular, and with teeth having a tuft of hairs at 
late below and appearing as if greener above, but yellowish and 
with pubescence more compact, pinnate-nerved though the basa 
long. Fruits on stout pedicels 1-2cm. long, mostl single and 
° e po 
ridge down the sides to the middle through which they split and 
continue tothe base. The seeds are gray, mottled, and conform 
