SYNOPSIS OF THE CACTACEZ OF THE UNITED STATES. 133 
On the San Pedro, and about Eagle Pass: flowers April. — Very similar to the last, but larger, 3-4 inches high, 
with fewer spines, the lower central usually hardly longer than the upper radial ones, about 1 inch long; lower radial 
spines oe and upper central ones longer. The rose-colored flowers are 12-16 lines long, much less wide. Fruit 
unkno 
E. Wurpptel, E. & B. in Pacific R. R. Rep.: ovato-globosus; costis 13-15 interruptis; aculeis radialibus 
z comiprensia albidis, centralibus 4 longioribus robustioribus compresso-quadrangulatis, summo latiore longiore, infimo 
robustiore deorsum ieecaste 5 seminibus magnis nigris. 
n the Colorado-Chiquito, in western N oe Mex ico. — Plant 3-5 inches high ; exterior spines 6-9 lines, 
upper central spine 12-18 lines long, and ere lines broad; other central spines a little shorter. Seed very [272] 
large, over 1} lines in the longest diameter. — Principally characterized by the few radial spines and the very 
road upper senrtrat one, which with the former forms an almost regular circle. 
4. E. potyancistrus, E. & B. 1. c.: ovatus, s. ovato- a beereitid costis 13-17 interruptis ; aculeis radialibus 
sub-19 complanatis albis, superioribus latioribus longioribus, inferioribus setaceis, centralibus difformibus, summo 
complanato elongato sursum curvato albo, reliquis 5-10 bacetivacit purpureo-fuscis, superioribus 2 rectis, ceteris 
uncinatis. 
Eastern slope of the California mountains, at the head of the Mojave River. — Plant 4-10 inches high, 3-4 in 
diameter ; radial spines }-2 inches long; upper central spine 3-5, the others 14-3} inches long, the lotwent shorter 
than the others. The number of the hooked spines varies from 3 to 7, according to age and development 
5. E. uncrnatus, Hopf., var.? Wricutt, E. in B.C. R.: glaucescens, ovatus; costis 13 interruptis; tuberculis 
usque ad basin sulcatis ; aculeis radialibus 8, inferioribus 3 uncinatis fuscis, reliquis 5 rectis, ae sate angulato 
rene flexuoso hamato elongato erecto stramineo : 248! fusco ; floribus fusco-purpureis minori 
ear El Paso and on the Rio Grande below: flowers March and April. — Plant 3-6 inches high, 2-33 inches in 
dicinster ; the tuft of long, erect, straw-colored spines ts very characteristic. Lower hooked radial spines about 1 inch 
long ; upper ones a little longer; central spine 2-4 inches long. Flowers 1-13 inches long. Berry fleshy, scaly. 
Seeds much compressed. — The Mexican £. wncinatus has 7-8 radial spines, similarly arranged, and 4 central spines ; 
the three upper ones not much longer ae the upper radial ones and straight, the lower one elongated and hooked. 
The flower and seed differ also to some extent. 
6. E. setisprnus, E. in Plant. Lindh. 1845: globosus, ovatus s. subcylindricus; costis 13 compressis ac 
angulatis ; tuberculis brevissime sulcatis ; aculeis radialibus 10-16 setaceis; centrali su ingulo robustiore beats 
fusco uncinato s. flexuoso curvato; floribus magnis flavis intus coccineis ; bacca pisiformi coccinea ; seminibus 
tuberculatis. : 
ar. a. HAMATUS: aculeis radialibus sub-12, centrali hamato robusto. — #. hamatus, Muhlenpf. EF. Muhlen- 
pfordtit, Fen. : 
Var, 8. SETACEUS: minor}; aculeis pluribus, centralibus 1-3 tenuioribus vix hamatis. 
Texas, from the Colorado to the Rio Grande, and westward as far as the San Pedro ver : flowers April [273] 
to October. — It is unnecessary further to describe this well-known and well-characterized species, which is 
now frequently cultivated ; a eames ribs, setaceous spines, small red berry, and tuberculated seeds easily 
distinguish it from all its a 
E. 81 ce cee (1851): globosus; costis 13 compressis acutiusculis interruptis ; aculeis radialibus 
taceis, 3 superioribus et 3 inferioribus uaa fuscatis, lateralibus 2-6 tenuioribus albidis flexuosis, rarissime 
casi ofan 4 aed 3 superioribus rectis purpureo-variegatis, eigerc compresso sett canaliculato 
elongato flexuoso vel hamato stramineo; floribus magnis flavis; bacca ovata v ; 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 four central spines, and some of the radial ones, hooked. . Treculianus, Lab. belongs here, or 
perhaps to the next. 
8. E. LONGEHAMATUS, Gal.: subglobosus ; costis 13-17 obtusis tuberculato-interruptis; tuberculis breviter 
sulcatis ; aculeis radialibus 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 superioribus 
