136 SYNOPSIS OF THE CACTACEZ OF THE UNITED STATES. 
E. uneursprnus, E. in Wisliz. Rep., from the country between Chihuahua and Parras, belongs here. [278] 
The fruit described as belonging to this species is that of EZ. uncinatus. 
Subtrib. 2, Conrrari£. Cotyledones facie hilum versus spectantes, lateribus seminis contraria. 
III. CEREUS, Haw. 
Ovarium baccaque sepalis squamiformibus in axillis plerumque pulvilligeris stipate. Stamina tubo floris 
breviori seu elongato infundibuliformi gradatim adnata. Semina fere exalbuminosa. Cotyledones abbreviate seu 
foliacee, plerumque hamate.— Plante costate, inflorescentia laterali. 
Subgen. 1. Ecxrinocerevs, E. in Wisliz. Rep. : ovarium aculeolatum: tubus floris abbreviatus, subeampanu- 
latus: stigmata crassa viridia : semina tuberculosa: cotyledones suberecte2. — Plante humiles, seepe subglobose, e 
basi ramosze vel ramosissime. 
§ 1. Pecrrnatt, multicostati; areolis confertissimis plerumque elongatis, aculeis rigidis brevibus pectinatis. 
* Viridiflori. 
1. C. vieiprriorvs, E. in Wisliz. Rep.: ovatus seu demum cylindricus, simplex vel parce ramosus; costis 
sub-13; areolis ovato-lanceolatis ; aculeis arcte radiantibus 12-18 cum superioribus 2-6 setaceis, lateralibus ceteris 
longioribus, inferioribus plerumque purpureo-fuscis, caeteris albidis, centrali plerumque nullo, subinde singulo robus- 
tiore variegato ; floribus versus apicem lateralibus e flavo virescentibus minoribus; baccis ellipticis parvis ; seminibus 
tuberculatis. 
ar. a. MINOR: subglobosus ; aculeis gracilibus brevibus. 
Var. 8. CYLINDRICUS : major, elongatus ; aculeis rigidioribus longioribus. 
Throughout western Texas and New Mexico. Var. a. about Santa Fé and northeastward : B. east of El Paso. 
Flowers May and June. — The small form is 1-2 inches high, with spines rarely more than 2 lines long; the larger 
form 8. is 3-6 or more inches high, its spines 2-5 or 6 lines long ; central spines, when present, longer and stouter. 
Flower about 1 inch long. 
2. C. cHtorantuus, E. in B. C. R.: cylindricus, simplex, seu parce ramosus ; costis 13-18 ; areolis 
ovatis ; aculeis laxe radiantibus 12-20 cum superioribus 5-10 setaceis plerumque albidis; centralium 3~5 [279] 
superioribus 2 brevioribus purpurascentibus, inferioribus 1-3 longioribus deflexis albidis; floribus in caule 
inferiore lateralibus e flavo virescentibus minoribus ; baccis parvis; seminibus tuberculato-s enbaalans 
Common about El Paso: flowers April. — Stems 3-10 inches bigh, 1}-2 inches in diameter ; aa spines 2-5, 
central ones 9-15 lines long. Flowers very similar to those of the last species, but seeds different. 
* * Flaviflori. 
. C. pasyacantuts, E. in Wisliz. Rep.: subcylindricus, simplex vel e basi ramosus; costis 16-21 ; areolis 
ovatis ; aculeis 20-30 patulis cinereis apice spe rubellis, interioribus 3-8 paullo robustioribus deflexis ; floribus 
subterminalibus magnis; bacca zig a tuberculatis. 
Var. 8. MINOR: aculeis paucioribus 
Common about El Paso: flowers Apal. very 5-12 inches high, densely covered with numberless spines. 
Flowers 3 inches wide, yellow, —an uncommon color in Cerei. Fruit an inch in diameter; in var. 8. only half 
as large. 
4, C. crenorpss, E. in B. C. R. : subsimplex, ovatus, 15-costatus; areolis lanceolatis ; aculeis albidis, radiali- 
bus 14-20 pectinatis, centralibus 2-3 uniseriatis brevibus; floribus magnis. 
Eagle Pass on the Rio Grande: flowers June. — Plant 2-4 inches high, thick in proportion ; spines 1-4 lines 
long. Flower large. — Similar to the last, but distinguished by the characters given, which, with the exception of the 
yellow flower, bring it close to C. pectinatus. 
* * * Rubriflori. 
5. C. pectinatus, E., Echinocactus pectinatus, Scheid.: ovato-cylindricus, 18-23-costatus; areolis lanceo- 
latis ; aculeis radialibus 16-20 subrecurvis pectinatis apice roseis, centralibus 2-5 brevissimis uniseriatis; tubo floris 
purpurei pulvillis 60~70 aculeolos rigidos 10-15 gerentibus stipato. 
Var. 8.2 ARMATU Tus, Poselg.: costis 15-16 ; Revie radialibus 16-20, centrali singulo ceteris longiore. 
Var. y.? RiaIDissimus, E. in B. C. R.: s 20-22; aculeis e basi bulbosa subulatis rigidissimis albidis seu 
rubellis 15-22 centralibus nullis ; florum rane es ‘ede pulvillis 80-100 dense stipato. 
South ot the Rio Grande, Chihuahua, etc. — The var. 8. from Monterey may belong either here or to the [280] 
next species. The var. y. from Sonora, without any central spines, and with very rigid radial ones, 1-4} lines 
long, is not yet saliaientty known to decide about its affinities. 
