17 
Texas, from the Colorado to the Rio Grande, and westward as far 
as the San Pedro River: fl. April to October. — It is unnecessary fur- * 
ther to describe this well-known and well-characterized species, which 
is now frequently cultivated ; the compressed ribs, setaceous spines, 
small red berry, and tuberculated seeds easily distinguish it from all 
its allies. 
7. E. sinuatus, Dietr. (1851): globosus; costis 13 compressis 
acutiusculis interruptis; aculeis radialibus setaceis, 3 superioribus et 
3 inferioribus rectiusculis fuscatis^ lateralibus 2 - 6 tenuioribus albi- 
dis flexuosis, rarissime hamatis; centralibus 4 robustioribus, 3 supe¬ 
rioribus rectis purpureo-variegatis, inferiore compresso se.u canalicu- 
lato elongato flexuoso vel hamato stramineo; floribus magnis flavis; 
bacca ovata viridi; seminibus minutissime punctatis. 
Country along the Rio Grande near Eagle Pass, and from there 
eastward. — Intermediate between the foregoing and the next species, 
and considered by Dr. Poselger a connecting link between them ; but 
easily distinguished from the former by the larger size, thicker ribs, 
flattened central spine, and by the shining, finely dotted seeds ; from 
the latter, to which it approaches much more closely, by the more 
compressed and less strongly tuberculated ribs, the smaller number of 
stigmata (8 - 12), smaller fruit, and much more finely dotted seed._ 
Poselger considers this a variety of E. setispinus. His E. setispinus , 
var. robustus , has the same seeds, and no doubt also belongs here; it 
is said to have all the 4 central spines, and some of the radial ones, 
hooked. E. Treculianus , Lab. belongs here, or perhaps to the next. 
8. E. longehamatus, Gal.: subglobosus; costis 13-17 obtusis 
tuberculato-interruptis ; tuberculis • breviter sulcatis ; aculeis radiali¬ 
bus rigidis subteretibus, infimis summisque ternis, lateralibus 2-6 
longioribus ; centralibus 4 robustis angulatis annulatis, quorum infimus 
deorsum hamatus rectus seu flexuosus, additis subinde 2-4 superiori¬ 
bus cum radialibus superioribus fasciculatis; floribus magnis flavis; 
stigmatibus 15 - 18; bacca oblonga virescente squamosa; seminibus 
lucidis exsculptis. 
Var. a . crassispintts : aculeis robustissimis radialibus 8-11, cen- <*. 7^^ 
tralibus 4 angulatis, infimo flexuoso plus minus hamato. E. flexi- 3 
spinus, E. in Wish Rep. non Salm. 
Var. /3. gracilispinus : aculeis gracilioribus 16-20, exterioribus r 
12-14, centralibus 4-8, infimo elongato hamato. E. hamatocan- /-' / 
thus, Mulil. 
3 
