. ee eee a 
29 
fl. March and April. — Heads 5-10 inches high, 23-4 in diameter; 
upper radial spines 3, lateral and lower ones }—1 inch long; central 
spines hardly longer, or the lower sometimes 14-23 inches long. 
Flowers 2-3 inches long, profusely covering the plant for four or 
six weeks. Seed the largest of any Echinocerei known to me, 0.8 
— 0.9 of a line long. 
20. C. Remeni, E. in Pl. Lindh. 1850: ovatus, cespitosus, lete viri- 
dis; costis 7-9 tuberculatis interruptis ; areolis orbiculatis, junioribus 
breviter tomentosis; aculeis teretibus robustis albidis seu junioribus 
flavidulis demum cinereis, radialibus sub-8, centrali singulo robustiore 
porrecto; floribus lateralibus infundibuliformibus limbo erectiusculo ; 
pulvillis ovarii tubique 16-18 albo-tomentosis aculeolos 3-5 geren- 
tibus ; sepalis interioribus 7—8 ovato-oblongis carinatis obtusis mu- 
cronatis; petalis 9-12 obovato-spathulatis obtusis integris concavis 
rigidis suberectis ; stylo longe supra stamina albida sursum rosea ex- 
serto; stigmatibus 6 — 7 petala equantibus erecto-patulis viridibus acu- 
ze 
tiusculis. 
In the granitic region about the Llano River, Western Texas: fl. 
May : fruit unknown. — Often 5-12 from the same base, densely 
cexspitose ; single heads 3-4 inches high, 2— 24 in diameter ; areole 
6-8 lines apart ; radial spines 5~ 12 lines long, upper ones usually 
a little shorter than the rest ; central spine 10-15 lineslong. Flower 
2 inches long and only one in diameter, remaining open day and 
night for a whole week, if the weather is not too warm. — Allied to 
the last species ; but distinct by the shorter heads, fewer ribs, fewer 
and paler spines, and smaller flower, with less numerous parts. 
21.? C. pavcispinus, E.in B.C. R.: ovato-cylindricus, parce ramo- 
sus vel simplex, 5~ 7-costatus ; areolis remotis ; aculeis robustis 3-6 
radiantibus fuscatis, centrali nullo vel raro robusto subangulato. 
Western Texas, from the San Pedro to the mouth of the Pecos. — 
Stem 5-9 inches high, 2—3 in diameter; spines 9 — 16 lines long, 
dark-colored, the central one almost always wanting. Flower and 
fruit unknown. 
22.? C. nexarprus, E. & B. in P. R. R.: ovatus subsimplex, 6- 
ostatus ; areolis remotis; aculeis rectis rigidis tenuibus angulatis, ra- 
dialibus 5—7 flavo-rubellis, inferiore breviore, centrali paullo robusti- 
ore (juniore fuscato) seepe deficiente. 
- Near Zuni, in Western New Mexico. — Heads few in each plant, 
or single, 4-6 inches high, 2-24 inches in diameter. Radial spines 
