3 & - Poselger Sept. 2, l86l 



several times, the flower was positioned in the elonation of the 

 axis, more f requently-thouglr right below the tip.. In the homeland 

 I believe to have observed, that all 1 flowers and fruit ff were in the 

 elongation of the axis. The c hange in growing condiotions may have 

 caused here a change* The buds open here only in the brightest surr- 

 shine. If there is no surr, they fade unopened. The color of the flo- 

 wers is definitively rauch paler than in the homeland. - 



C er * variabilis Pfr. I did not encounter in Mexico nor Texas; 

 Your description seeras to me to C. prlnceps nuch nore,, which is 

 thoroughly distributed there.- The most interesting Cer . Greggii I 

 unfortunately ! do not have any more. C. glganteus Hl Young plants are 

 always in the protection or shade of a shrutt*; . I frequently noticed,, 

 that he had trouble at times to find *.bv£ f iciefitnumbers of plant* 

 of several cactus speoies, which had theapprpriate size for shippingv 

 while large, old speeimens of the same Speeles cover the earth all' 

 over-. Specially so with Piloc.^e^^. . Everywhere stood plant s of 

 20 - 30 feet (? E.D.) high, rarely V - !§• 5 I founff this Pilocerus 

 covered with flowers, but not a sign of fruits t also none fron the 

 last year.lt now could he, that not every year is sui table for ger- 

 mination of seeds^otherwise one would find plants of all slzes and 

 ages easily*«uit e eontrarily, it seems, that for Single, Speeles 

 öfter a long sequence of years passes without a favorable weather 

 condition for ggeneral germination, and, in the meantime,, may-be 

 only Single plants, in a specially protected Situation, achieve de- 

 velopnent. .Possinbly, it is similar with C. glganteus . Artif icially, 

 the latter germlnatesr very easily, but the plants are very delicate,, 

 and of the many seedlings, which I had, only few survived.. 



