108 MISSOURI BOTANICAL GARDEN. 
2. Racemosely branched below the small umbel; capsule long warted; 
a tall mountain perennial or biennial. 
E. atta n. sp. L£. dictyosperma Engelm. Euphorb. 
Wheeler’s Exped. 248. 1878. 
One primary stem, 2 to 6 mm. thick, 2 to 6 dm. high, 
or often several stems, sometimes as large, from buds at the 
crown; the many branches along the stem below the umbel 
longer than the rays; rays 3, 2 to 3 cm. long, several times 
short dichotomous; stem leaves oblong spatulate, very 
numerous, close together below, thin, somewhat glaucous, 
minutely serrulate, obtuse, 1 to 5 em. long, 7 to 12 mm. 
wide ; umbel leaves more oblong; floral leaves oblong ovate 
to ovate, subcordate, obtuse, 6 to 10 mm. wide, 10 to 15 
mm. long; involucre 1 to 2 mm. high, glabrous except the 
short, ovate, ciliate lobes ; bracts about 5, spatulate, ciliate ; 
stamens jointed below, 5 to 10; calyx discoid; capsule 
depressed globose, 3 to 4 mm. high, 4 to 5 mm. broad; 
sulci prominent; cocci almost covered with cylindrical 
warts 1 mm. or less long; styles free, bifid above, 1 mm. 
or less long, recurved when young, incurved when old, 
slender, tapering upward; stigmas capitate; seeds 1.8 to 2 
mm. long, 1.6 to 1.8 mm. wide, 1.2 to 1.4 mm. thick, 
purple black, with lighter colored low reticulations forming 
large areolae ; caruncle small, thin, flat. — In the mountains 
of southern Arizona and New Mexico, and in Mexico. The 
specimens seen are all from 5200 to 9800 feet altitude. — 
Plate 24. 
Specimens examined from Arizona (Pringle, Huachuca Mts , 1884; 
Toumey, Huachuca Mts., 10, 1894; Engelmann, Santa Rita Mts., 1880; 
Rothrock, Camp Grant, 370, 1874); New Mexico (Wooton, White Mts., 
1895, 285, 1897) ; Mexico (Forrer, near Durango, 1881; Pringle, Sierra di 
Pachuca, 6960, 1898, very small). 
+ + Annual; capsules smooth; floral leaves widest at or above the 
middle; seeds deeply exsculptate reticulate, 
E. Lterococca (Engelm.) n. comb. . dictyosperma leio- 
cocca Engelm. Mex. Bound. 2!:191. 1859. #.Texana 
Boiss. Cent. Euph. 30. 1860; DC. Prod. 15?: 137. 
24 
