OF ARTS AND SCIENCES. 281 



radialibus 18 - 20, centralibus 5-7, quorum 3 inferiores elongati 

 deflexi. 



Santa Rosa, south of the Rio Grande. — Stem 6-9 inches high ; 

 tubercles well marked ; lower radial spines 5-7 lines long, much 

 longer than the upper ones ; lower central spines 1-2 inches long. 

 Flower said to be red. 



§ 2. Decalophi. 

 * Purpurei ; fiorihus diurnis. 



10. C. Fendleri, E. in PI. Fendl, : ovato-cylindricus ; costis 9 - 

 12 ; areolis subconfertis ; aculeis basi bulbosis, radialibus 7-10 rectis 

 seu curvatis albidis et fuscis, inferioribus robustioribus, centrali va- 

 lido sursum curvato atrofusco plerumque elongate ; floribus sub ver- 

 tice lateralibus magnis ; seminibus obliquis tuberculato-scrobiculatis. 



New Mexico, from Santa Fe to below El Paso, and from east of 

 the Pecos to Zuni : fl. in May and June. — Stems 3-8 inches high, 

 not many from the same base ; spines very variable, but always very 

 bulbous at the base, and some of them white, some deep brown or 

 black, and others party-colored ; radial ones | - 1 inch, and the cen- 

 tral one 1-2 inches long. Flower 2| - 3| inches in diameter, of a 

 deep purple color. Berry 1 - l^- inch long, edible. Seed deeply and 

 irregularly pitted by the confluence of many of the tubercles, un- 

 usually oblique. 



11. .^ C. MojAVENSis, E. & B. in P. R. R. : ovatus, dense caes- 

 pitosus, glaucescens, 10 - 12 costatus ; areolis remotis ; aculeis va- 

 lidis curvatis, radialibus 7-8, lateralibus robustioribus longioribus, 

 centrali sin^ulo sursum curvato elonjrato. 



Var. /3. ? ZuNiENsis : 10-costatus ; aculeis debilioribus 4-angulatis 

 bulbosis rectis vel flexuosis, radialibus 8, summo longiore robustiore ; 

 centrali recto seu sursum curvato longiore, omnibus bulbosis. 



On the Mojave River in California, and /3. farther east, on the Col- 

 orado Chiquito. Ovate heads 2-3 inches high, forming dense cecspi- 

 tose masses ; upper and lower spines 9-15 lines, lateral ones 15 - 

 25 lines long, central spine l-2--2| inches long, dusky. Var. /3. is 

 distinguished by having the upper radial spine almost as stout and 

 long as the central spine, the former being 12- 18, the latter 18-24 

 lines long. Both seem to be distinguished from the nearly allied C. 

 Fendleri by havin* the lowest spines weakest, while in that species 

 they are the stoutest of the exterior ones. The resemblance to C. 



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