106 MISSOURI BOTANICAL GARDEN. 
238. 1779). E#. dictyosperma Mexicana Engelm. 
l.c. #. dictyosperma multicaulis Coulter, Bot. West. 
Tex. 393. 1894. 
Stems crowded, erect or ascending, strict, many from a 
biennial or perennial root, 1 to 2 dm. high, reddish, leafy ; 
umbel 3-rayed, not much branched; stem leaves oblong 
cuneate to linear cuneate, low crenulate, 3 to 5 mm. wide, 
1 to 2cm. long, obtuse to retuse; floral leaves oblong, 
acutish; involucre about 1 mm. high; lobes short trian- 
gular, rounded or bidentate, with a few short hairs on 
the margin; glands very small; bracts 5 or more, broad, 
entire or dentate, smooth; stamens 5 to 10; capsules sub- 
globose, trisulcate; cocci rounded, short verrucose on the 
upper part, 2 to 2.5 mm. high, 2.5 to 8 mm. wide; styles 
short, free, deeply bifid; seeds lenticular ovoid, brown, 
finely low reticulate, 1.4 to 1.6 mm. long, 1 to 1.3 mm. 
wide, .7 to .8 mm. thick.— Southern Arizona to Texas 
and in Mexico. — Plate 21. 
Perhaps only a variety of one of the northern species, 
but I follow Engelmann and Boissier in retaining it as a 
distinct species. 
Specimens examined from Texas (Wright, El Paso, 1824, 1851-2); 
?Arizona (Thurber, seed only in Engelm. herb.); Mexico (Gregg, 
Mapimi, 456, 462, 1847, and 1848-9; Thurber, Los Playos, 381, 1851). 
Palmer, Walnut Grove, Ariz., 510, 1876; and Thurber, 
Mule Spring, N. M., 282, 1851, are young specimens, 
doubtfully referred here, as also is Parish, Calif., near 
Mex. boundary, with very pubescent lobes and bracts. 
E. DICTYOSPERMA Fischer & Meyer, Ind. Sem. Hort. Petrop. 
2: 37. 1835; Boiss. DC. Prod. 157: 135. 1862. 
(in part); Watson, Bot. Calif. 2: 75. 1880; Greene, 
Man. Bay Region 80. 1894. 
Stem stout, 2 to 3 dm. high, 2 to 4 mm. thick, few to 
several stems from the base, branched; rays 3, several 
times dichotomously branched, the umbel longer than 
22 
