——— — 
' : 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. stnvatus, Dietr. (1851) : globosus; costis 13 compressis 
acutiusculis interruptis ; aculeis radialibus setaceis, 3 superioribus et 
3 inferioribus rectiusculis fuscatis 1, lateralibus 2—6 tenuioribus albi- 
dis flexuosis, rarissime hamatis; centralibus 4 robustioribus, 3 supe- 
rioribus rectis purpureo-variegatis, inferiore compresso seu 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 roe 
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. LE. Treculianus, Lab. belongs here, or perhaps to the next. 
8. E. toncenamatus, 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. CRASSISPINUS: aculeis robustissimis radialibus 8 — 11, cen- 
tralibus 4 angulatis, infimo flexuoso plus minus hamato. KE. flexi- 
spinus, E. in Wisi. Rep. non Salm. 
Var. 8. GRACILISPINUS: aculeis gracilioribus 16-20, exterioribus 
12-14, centralibus 4-8, infimo elongato hamato. E. hamatocan- 
thus, Muhl. 
3 
