23 
20 cum superioribus 5~ 10 setaceis plerumque albidis; centralium 
3-5 superioribus 2 brevioribus purpurascentibus, inferioribus 1-3 
longioribus deflexis albidis ; floribus in caule inferiore lateralibus e 
flavo virescentibus minoribus ; baccis parvis ; seminibus tuberculato- 
scrobiculatis. 
Common about El Paso: fl. April. — Stems 3-10 inches high, 
14-2 inches in diameter ; radial spines 2-5, central ones 9~ 15, 
lines long. Flowers very similar to those of the last species, but 
seeds different. 
* * Flaviflori. 
3. C. pasyacantuus, E. in Wisl. Rep.: subcylindricus, simplex 
vel e basi ramosus; costis 16~21; areolis ovatis; aculeis 20-30 
patulis cinereis apice spe rubellis, interioribus 3-8 paullo robustio- 
ribus deflexis ; floribus subterminalibus magnis ; bacca subglobosa ; 
seminibus tuberculatis. « oy : 
Var. 8. mrnor*: aculeis paucioribus ;-bacea- minere. hi > 
- _ Y* 
Common about El Paso: fl. April.— Plant 5-12 inches high, 
densely covered with numberless spines. Flowers 3 inches wide, yel- 
low, an uncommon color in Cerei. Fruit an inch in diameter; iv 
var. 8. only halfas large. 
4. C. ctenorpes, E. in B. C. R.: subsimplex, ovatus, 15-costatus ; 
areolis lanceolatis; aculeis albidis, radialibus 14-20 pectinatis, cen- 
tralibus 2— 3 uniseriatis brevibus ; floribus magnis. 
Eagle Pass on the Rio Grande : fl. June. — Plant 2-4 inches high, 
thick in proportion ; spines 1-4 lines long. Flower large. — Simi- 
lar to the last, but distinguished by the characters given, which, with 
the exception of the yellow flower, bring it close to C. pectinatus. 
rd 
* * * Rubriflori. 
5. C. pectinatus, E, (Echinocactus pectinatus, Scheid.): ovato- 
cylindricus, 18 —23-costatus ; areolis lanceolatis ; aculeis radialibus 
16-20 subrecurvis pectinatis apice roseis, centralibus 2-5 brevissi- 
mis uniseriatis ; tubo floris purpurei pulvillis er 70 aculeolos rigidos 
10 — 15 gerentibus stipato. 
ar. 8.? sarmatus, Poselg.: costis 15-16; aculeis radialibus 
16 — 20, centrali singulo ceteris longiore. 
Var. y.? Ricipissimus, E. in B. C. R.: costis 20-22; aculeis e 
basi bulbosa subulatis rigidissimis albidis seu rubellis 15-22 centrali- 
bus nullis; florum subverticalium tubo pulvillis 80 —- 100 dense stipato. 
