370 
brown and straightish (the lower ones sometimes more or less hooked), 
2 to 2.0m, long, the 2 to 6 laterals more slender, longer (2.5 to 3.5 em.), 
often flattened, puberulent and whitish, sometimes flexuous or hooked; 
central spines 4, puberulent, yellowish (or purplish-variegated), the 3 
upper ones slender, flattened or subangled, erect and generally straight 
(rarely hooked), 4 to 5 em, long, the lowest one much stouter, flattened 
or even channelled, straw-color, flexuous, more or less hooked (sometimes 
straight), 5 to 10 em. long: flowers yellow, 5 to 7.5 em. long: fruit oval, 
green, 16 to 18 mm, long: seeds obovate or lenticular, shining and 
minutely punctate, 0.8 to 12mm. long. (Z/L Cact. Mex. Bound, t. 74, 
figs. 11-14, seeds)—Type unknown, but probably Poselger of 1850 in 
Herb. Mo, Bot. Gard. 
From the Rio Grande, near Eagle Pass,and the San Pedro and Pecos, 
Texas, westward to Arizona (near Comstock) and southward into 
Coahuila. 
Specimens examined: TEXAS (Wright of 1852, on the Limpia, also 
2, 223, 689): ARIZONA (Nealley of 1891, near Comstock): COAHUILA 
(Poselger of 1850). 
31. Echinocactus setispinus Engelm. Pl. Lindh. i, 246 (1845). 
Eehinocactus setispinus setaceus Engelm. Pl. Lindh. ii, 201 (1850), 
Subglobose, 5 to 7.5 cm. in diameter: ribs 13, more or less oblique, 
often undulate or somewhat interrupted: radial spines 14 to 16, seti- 
form and flexible, {0 to 20 mm, long, the uppermost (the longest) and 
lowest ones yellowish-brown, the laterals white; central spines 1 to 3, 
setiform and flexuous, dark, 24 to 82 mm. long: flowers funnelform, 4 
to 7 cm. long, yellow, scarlet within: fruit globose, fleshy and red, 
about 8 mm. in diameter: seeds globose-obovate and oblique, strongly 
tuberculate, 1.2 to 1.6mm. long. (71, Cact. Mex. Bound. t. 20, in part)— 
Type, Lindheimer of 1544 in Herb, Mo. Bot. Gard. 
From the Brazos River, Texas, to the Rio Grande and southward into 
Tamaulipas. In mesquit thickets, ete. 
Specimens examined: TEXAS (Lindheimer of 1844, 1809; Wright of 
1848, 1850; Hall 234): TAMAULIPAS (St. Louis Volunteers” of 1846): 
also specimens cultivated at St. Louis in 1845, presumably from the 
type. 
This smaller form, which happened to be described first, is the eastern lowland 
representative of the next, extending from the lowlands of southeastern Texas to 
those of northeastern Mexico, 
32. Echinocactus setispinus muhlenpfordtii (Fen.). 
Echinocactus muhlenpfordtii Fen, Alle. Gart. Zeit. xv, 65 (1847), 
Echinocactus hamatus Muhlenpf. Allg. Gart. Zeit. xvi, 18 (1848), 
Echinocactus setispinus hamatus Engelm. Pl. Lindh. ii, 201 (1850). 
Ovate-globose to oblong-cylindrical, larger, becoming 10 to 20 em. 
high: radial spines fewer (10 to 12), stouter, larger (12 to 32 mm.); 
central spine stouter, 24 to 32 mim. long, hooked: otherwise as the last. 
(Ill, Cact. Mex. Bound. t. 20, in part)—Type unknown. 
