22 
E, uneutsrinvs, E. in Wisl. Rep., from the country between Chi- 
huahua and Parras, belongs here. The fruit described as belonging 
to this species is that of E. uncinatus. 
Subtrib. 2. Conrrarirz. * ee facie hilum versus spectan- 
tes, lateribus seminis paraHela.. (Tray ee 
Ill. CEREUS, Haw. 
Ovarium baccaque sepalis squamiformibus in axillis plerumque pul- 
villigeris stipate. Stamina tubo floris breviori seu elongato infun- 
dibuliformi gradatim adnata. Semina fere exalbuminosa. Cotyle- 
dones abbreviate seu foliacex, plerumque hamate. — Plante cos- 
tatee, inflorescentia laterali. 
Subgen. 1. Ecntnocrreus, E. in Wisl. Rep.: ovarium aculeola- 
tum: tubus floris abbreviatus, subeampanulatus : stigmata crassa viri- 
dia: semina tuberculosa: cotyledones suberecte. — Plante humiles, 
seepe subglobose, e basi ramosze’ vel ramosissime. 
§ 1. Pectinati, multicostati ; areolis confertissimis plerumque elon- 
gatis, aculeis rigidis brevibus pectinatis. 
* Viridiflori. 
1. C. virtpirtorus, E. in Wisl. Rep.: ovatus seu demum cylin- 
dricus, simplex vel parce ramosus ; costis sub-13; areolis ovato-lance- 
olatis ; aculeis arcte radiantibus 12 — 18 cum superioribus 2 — 6 setaceis, 
lateralibus czeteris longioribus, inferioribus plerumque purpureo-fuscis, 
ceeteris albidis, centrali plerumque nullo, subinde singulo robustiore 
variegato; floribus versus apicem lateralibus e flavo virescentibus 
minoribus ; baccis ellipticis parvis ; seminibus tuberculatis. 
Var. a. MINOR: subglobosus ; aculeis gracilibus brevibus. 
Var. 8. CYLINDRICUS: major, ebongatus; aculeis rigidioribus longi- 
oribus. 
Throughout Western Texas and New Mexico. Var. a. about Santa 
Fé and northeastward: 8. east of El Paso. FI. 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. coLorantuus, E. in B.C. R.: cylindricus, simplex, seu parce 
ramosus ; costis 13-18; areolis ovatis; aculeis laxe radiantibus 12 — 
