134 SYNOPSIS OF THE CACTACEH OF THE UNITED STATES. 
cum radialibus superioribus fasciculatis ; floribus magnis flavis ; stigmatibus 15-18; bacca oblonga virescente 
squamosa ; seminibus lucidis exsculptis. 
ar. a. CRASSISPINUS: aculeis a rayage radialibus 8-11, centralibus 4 angulatis, infimo flexuoso plus minus 
ena E. flexispinus, E. in Wisliz. Rep. 
. GRACILISPINUS : aculeis seetitundtien 16-20, exterioribus 12-14, centralibus 4-8, infimo elongato hamato. 
E. RATE ro M 
ar, y- BREVISPINUS : aculeis gracilioribus radialibus 8-11, centralibus 4 teretibus cum infimo hamato [274] 
radiales vix ny sirens 8. 
of El Paso, near the Pecos and San Pedro Rivers, and along the middle course of the Rio Grande: var. a. 
south f és Rio Grande. Flowers July and August.— Plants from }-2 feet high; the larger ones ovate; areole 
distant. Spines very different in size in the different varieties ; radial spines 1-33, eotndel spines 13-63 inches long. 
Flowers 23-3} inches long. Seeds similar to the last, but with much larger pits, 
§ 2. CoRNIGERI. 
A. Heteracantht. 
9. E. Wisrizent, E. in Wisliz. Rep.: giganteus, globoso-ovatus ; costis 21 compressis crenatis ; areolis elon- 
gatis; aculeis radialibus summis infimisque 6 robustis rectis seu curvatis, lateralibus 14-20 (additis subinde summis 
brevioribus fasciculatis) tenuibus elongatis flexuosis; centralibus 4 robustis angulatis annulatis rubellis, 3 supe- 
rioribus rectis, inferiore canaliculato deorsum hasnt ; floribus flavis ; bacca ovata squamosissima ; seminibus 
reticulatis. 
Valley of the Rio Grande about El Paso, and thence to the Upper Gila: flowers July and August. — Plant 
2-4 feet high ; diameter smaller. Radial spines 1-2, central ones 1}-3 inches long. Flowers 2} inches long. 
10. E. Leconter, E. in P. R. R.: giganteus, obovato-claviformis ; costis 20-30 compressis crenatis ; areolis 
elongatis ;. aculeis radialibus summis infimisque 6-10 robustis angulatis plus minus curvatis, lateralibus 10-16 
(addidis subinde summis brevioribus fasciculatis) tenuibus elongatis flexuosis, centralibus 4 robustis compressis annu- 
latis corneis, 3 superioribus sursum inferiore subinde subhamato deorsum curvatis; floribus flavis ; bacca ovata 
ss iggeees ; seminibus scrobiculatis 
the lower parts of the Gila and Colorado Rivers, and in Sonora: flowers August and September. Very 
similar ‘ the last, but a more slender, often quite clavate plant; larger specimens 3-4 feet high, and of only one third 
that diameter. Arrangement of spines similar, but generally 5 (not 3) radial spines below the lowest central one; 
central spines more compressed, upper ones curved, lower one rarely somewhat hooked. Flower, fruit, and seed 
smaller ; seed more oblong and pitted. 
E. INGENS, Zucc., in the number ‘and arrangement of spines, is the simple type of our more northern [275] 
species. It has on the oval areolx 4 stout cruciate central spines, 3 upper and 3 lower radial ones, and on 
2 slender lateral spines. Seeds smooth. The flower seems to refer it, however, to the Hriocarpt. 
B. Homeacanthi. 
«+ Lepidocarpt. 
11. E. Emoryt, E., in Emory’s Rep. 1848, and B. C. R.: grandis, ovatus; costis 13-20 obtusis tuberculatis ; 
areolis ovatis; aculeis radialibus 7-8 subequalibus robustis subangulatis annulatis paullo recurvatis rubellis 1-2 polli- 
caribus, centrali singulo recurvo s. subhamato paullo robustiore; floribus magnis purpurascentibus. 
Lower Colorado, and principally in Sonora: flowers August and September. Larger plants 23-3 feet high ; 
spines usually 1-2, and in a large specimen from Guaymas nearly 3 inches long. Flowers about 3 inches long. Fruit 
unknown. 
12. E. viripEscens, Nutt.: globosus, simplex seu raro ramosus; costis 13-21; aculeis robustis compressis 
annulatis plus minus curvatis rubellis, radialibus 12-20 infimo breviore magis curvato; centrali 4 angulatis 
robustioribus longioribus, infimo rectiore longiore ; floribus virescentibus ; bacca squamosa ; seminibus minutissime 
scrobicula: tis. 
an Diego, California.— Less than a foot in diameter, globose or flattened. Radial spines 5-10 lines long, 
3 upper ae ones a little longer, and lower central spine 12-18 lines long. Flower 1} inches long. 
13. E. cynrnpracevs, E. in Sill. Journ. 1852: ovatus seu subcylindricus, plerumque e basi ramosus ; costs 
21 vel pluribus; aculeis robustis compressis annulatis plus minus curvatis flexuosisve rubellis, radialibus sub-12, 
aculeis adventitiis sub-5 gracilioribus supra sepe adjectis, infimo hamato, centralibus 4 angulatis robustissimis cruciati 
superiore latiore sursum recto, inferiore decurvato ; floribus flavis ; bacca squamosa. 
