132 MISSOURI BOTANICAL GARDEN. 
broad irregular flat ridges or broad shallow pits, gray, the 
ridges usually white, 2.2 to 2.4 mm. long, 1.2 to 1.7 mm. 
wide, raphe sunken, a rather acute ridge on the back; 
chalazal space deep; caruncle depressed conical. — Eastern, 
central, and southern Mexico. The two specimens from 
Texas referred here are too near EZ. brachycera. — Plate 48. 
Specimens examined from Mexico (Gregg, San Antonio, 351, 1848-49, 
Saltillo, 426, 1848-9, Real del Monte, 643, 1849; Palmer, Durango, 72, 
1896, Coahuila, 1226-27-28, 1880, Saltillo, 1225, 2064, 1880; Parry & 
Palmer, San Luis Potosi, 803, 1878; Halm, 1868; Ghiesbreght, Chiapas, 
784, 1864-70, a form; Hartweg, 31, 1857; Ascherborn, from the type of 
E. esulaeformis; Halstead, Volcan. de Pizzaro; Schiede, 38; Seaton, Mt. 
Orizaba, 224, 1891; J. D. Smith, Guatemala, 3476, 1892; Nelson, Oaxaca, 
1361, 1894; Duges, Guanajuata, 1880, 1883; Graham, Harb. J. S. Mill; 
Schaffner, Vallée de Mexico, 1875, San Luis Potosi, 1864, 1866, 1876) ; 
Texas (Wright, Nueces, 1404, Rio Grande, 1848). 
E. rosusta (Engelm.) Small in Brit. & Brown, Il. 
Flora 2: 381. 1897. H. montana robusta Engelm. 
Mex. Bound. 2!: 192. 1859. #. montana Boiss. DC. 
Prod. 157: 148. 1862. (in part); Coulter, Man. 327. 
1885; and most authors. — Brit. & Brown, Ill. Flora. 
f. 2838. 
Stems many, stout, 1 to 3dm. high, covered at the base 
below ground with broad ovate membranaceous scales, 
many large spreading branches below the 3 to 5-rayed 
umbel, smooth or occasionally pubescent especially at the 
base of the floral leaves; rays short, many times dichoto- 
mous; sterile branches with smaller and narrow lanceolate 
oblong leaves usually present; stem leaves oblong to ovate 
cordate, usually sessile, 10 mm. wide, 12 mm. long; floral 
leaves broadly ovate to cordate, 10 to 15 mm. wide, 10 to 
12 mm. long; involucres 2.5 mm. high, 1.5 mm. wide, 
hirsute inside; lobes triangular or lanceolate triangular, 
hirsute, sometimes bidentate at the apex; glands semilu- 
nate, short horned and sometimes dentate between the 
horns, 1 to 2 mm. wide, 1 mm. or less long; fifth gland 
replaced by a lobe shorter than the other lobes; bracts 
short, narrow, pubescent; stamens several, their pedicels 
48 
