21 
depressus; costis 13 - 27 acutis undulatis ; areolis cordatis; aculeis 
robustis annulatis, plus minus curvatis rubellis, radialibus 6-7 infimo 
deficiente, centrali singulo robustiore compresso decurvato ; floribus 
roseis dense lanatis ; petalis laciniatis aristatis ; bacca coccinea lana- 
ta ; seminibus lsevibus lucidis. 
Southern Texas,, and Northeastern -Mexico, from the Colorado to 
Saltillo; not westward beyond the San Pedro River: fl. April and 
May. — Heads 8-12 inches in diameter, flat, or very old ones some¬ 
times globose ; spines from \ - 2 inches long. Flowers about 2 inches 
long. 
§. 3. - Theloidei , *Salm. 
18. E. bicolor, Gal., var. Schottii, E, in B. C. R. : ovatus; costis 
8 obtusis interruptis; aculeis radialibus 15-17 rectis, summis 2-4 
longioribus latioribus compressis, centralibus 4, summo latiore longi- 
ore ; floribus majoribus purpureis. 
Mier, on the Rio Grande : fl. September. — Plant 4-6 inches high, 
2-3 in diameter; upper radial spines about 1 inch, upper central 
one 1J inches long ; lower radial and central spines reddish variegated. 
Flower 2-3 inches long, bright purple or rose-colored. — Distin¬ 
guished from the Mexican E. bicolor , principally by the larger num¬ 
ber of radial spines, and the greater length of the upper central spine, 
which is carinate underneath. 
§ 4. Intertexti. 
19. E. intertextus, E. in B. C. R.: minor, ovato-globosus; cos¬ 
tis 13 acutis interruptis; tuberculis sulcatis; aculeis rigidis rubellis 
apice fuscatis, radialibus 16-25 arete adpressis, superioribus 5-9 
tenuioribus subfasciculatis, infimo robusto brevi; centralibus 4, superi¬ 
oribus 3 radiales superiores excedentibus cum iis implicatis, inferiore 
singulo abbreviato porrecto ; floribus parvis in vertice dense lanato 
congestis roseis; bacca vix squamata sicca; seminibus lucidis sca- 
phoideis. 
Yar. 0. dasyacanthus, E. 1. c. i ovatus; aculeis setaceis longiori¬ 
bus purpureo-csesiis, radialibus patulis, centrali inferiore ceteris paullo 
breviore. 
From El Paso to the Limpio, and southward to Chihuahua : var. 0. 
more common about El^ Paso : fl. March and Ap^ril. — Plant l*to 4, 
the var. 0. even 6 inches high, 1 - 3 in diameter; spines 2-6, cen¬ 
tral oqes 1-9 lines long, in 0. 6-8 and central spines 9-11 lines 
long. Flower about 1 inch long. Fruit 4 lines in diameter. 
be 
cm 
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