363 
upper 3 erect-spreading, 2 to 3 em. long, the lower 2 weaker and 
declined, the central one longer, more rigid and keeled, very broad 
(5 to 8 mm.) and hooked downward: tlowers purple, 2.5 to 3.5 em. long: 
fruit ovate: seed reniform, slightly pitted, 1.5 mm. long. (ZU, DC. le. 
t. 7; Mém. Cact. t. 10)—Type unknown. 
In Mexieo, from Nuevo Leon southward to Guatemala. 
Specimens examined: SAN Luis Povrost (Parry & Palmer 270, 273; 
Pringle 3270; Eschanzier of 1891): Nunyo LEON (Bourgeau 1183): 
VERA OrRvz ( Weber of 1865): State of Mrxico (Poselger of 1851): 
MEXx1Ico, with no State assigned (Jallincrodt 176). 
A form with the lower central yellow and the flowers salmon is noted by Mrs. 
Anna B, Nickels. 
14. Echinocactus wislizeni Fngelm. Wisliz. Rep. 12 (1848). 
At first globose, then ovate to cylindrical, 5 to 12 dm. high: ribs 21 
to 25 (13 in small specimens), acute and oblique, more or less tuber- 
culate: radial spines 1.5 to 5 em. long, the 3 upper and 3 to 5 lower 
ones stiff, straight or curved, annulate, and red (in old specimens the 3 
stout upper radials move toward the center and become surrounded by 
the upper bristly ones),the 12 to 20 laterals (sometimes additional 
shorter ones above) bristly, elongated, and tlexuous, horizontally 
spreading. yellowish white; centrals 4, stout, angled, and red, 3.5 to 
7.5 em, long, the 3 upper straight, the lower one longest (sometimes as 
much as 10 to 12 em.), very robust (flat and channeled above), and 
hooked downward: flowers yellow or sometimes red, 5 to 6.5 em, long: 
fruit ovate, yellow, soon becoming hard: seeds obliquely obovate, 
black and rough, 2 to 2.5 inm. long. (JI/., Cact. Mex. Bound. t. 25, 26; 
Cact. Whippl. Exped. t. 3, figs. 1,2)—Type, Wislizenus of 1846 in 
Herb. Mo. Bot. Gard. 
From southern Utah, through eastern Arizona to the Rio Grande 
region about El Paso and southward into Chihuahua; also in Lower 
California. 
Specimens examined: Uvrar (Bischoff of 1871: Siler of 1875): ARI- 
ZONA (Parry of 1852; Bischoff of L871; Palmer of 1873; Rothrock 492; 
G. R. Vasey of 1881, near Pantano; Pringle of 1882; Rusby of 1883; 
Wilcox of 1894, Fort Huachuca): NEw MEXICO ( Wislizenus of 1846, near 
Dofia Ana): TEXAS, region about El Paso (Wright of 1851; Bigelow of 
1851, 1853; Hvans of 1891): CHIHUAHUA (Pringle 211): LOWER CALI- 
FORNIA ( Brandeqee of 1889, near San Franciscito). 
Including its variety lecontei, the largest Mchinocactus north of the Mexican bound- 
ary, aud with its congeners known as the ‘barrel cactus.” Young specimens may 
differ materially in spine characters. 
15. Echinocactus wislizeni lecontei Engelm. Wheeler's Rep. 128 (1878). 
Often somewhat taller (sometimes becoming 24 dm. high and 6 dm. 
in diameter), usually more slender, and at last clavate from a slender 
base: ribs somewhat more interrupted and more obtuse: lower central 
spine more flattened and broader, curved (rather than hooked) 
24 
