oblong or cylindric, two to eight inches high, by one and a 
half to two in diameter, simple or sparingly branched ; 
furrows about thirteen, separated by obtusely triangular 
ribs, one-third to one-half of an inch broad at the base. 
Areolex of spines ovate-lanceolate or oblong, about their 
own length apart. Spines twelve to eighteen, with often a 
few much shorter and more slender at the apex of the 
areole, pectinately spreading, about a sixth of an inch long, 
with usually one (rarely two) stouter, longer, central, erect 
spines; colour of spines very variable, from red-brown 
to white, or variegated, especially the central. Flowers 
laterally produced on the ribs above the middle of the plant, 
an inch and a half in diameter. Calyz-tube short, spinose, 
green. Sepals and petals narrowly cuneiformly oblong, 
yellow, with a faint pink or greenish tinge, tip two-lobed. | 
Anthers yellow. Stigmas green. Fruit small, ellipsoid, 
spinulose. Seeds tubercled.—J. D. H. 
Figs. 1 and 2, Areole with spines; 3, petal; 4, stamen :—AU/ enlarged. 
