8 Prince Salm Sept. 28, 18^8 



0. arborescens, it could be very close to our stellata» , which, however 

 is far removed, to beeome ever arborescens. The Qp.clavata is a most 

 curious species, the seeds of which, unf ortunately, did not germi~ 

 nate». The seeds of the Opuntiae are really all kidney-shaped, and of 

 a whitish color, This character I also attributed to the tribus*, For 

 the remaining tribus I could not determine anything special or gene- 

 ral. One has believed, that with the old Echlnocacti ' the "semina an- 

 pulacio-digitalif ormis** were (about )• Your Wellborn seens how - 



ever, not to have seen this shape» The color is most varied and with 

 Kamillariae I often sowed very light brown, almost whitish seeds, 

 which srerninated just as well as the black ones.> The H. sinplex of 

 Nuttall (or cact.mammillari s) is def initely not the tropical plant,, 

 which Linne knew, and is most likely the species , which grows with. 

 M. vivipara on the Missouri;. This species can rightfully be named: 

 M« Nuttalli ' according to general custom in such cases,. Your M«similis_ 

 is supposed to be similar to it, and thus the name can remairr.. For me 

 Op. nissouriensis x of Nuttall ( Qp»polyacantha Shaw) »which I sent you~ 

 (and shall send again) ' Stands it here in the open, and raust thus, 

 even. if it is not Cferox Katt, , cone fron a colder area. What reasons 

 Ha worth had, this Op. , and also Op.frrrilis to consider identical with 

 the species described by Nuttall, I do not know. He changed the name 

 ferox, be cause there was already an other Op«f erox. I have not yet 

 tried Cp. fragilis in the open; but I will do this,. and will also 

 send it to you«. I shall at this occasion send you also other Opuntiae,, 

 pa^tially determined by me; as it can be nice and useful for you,to 

 get aquainted with these species, They are the species most widely 

 distributed cacti in America, and fron Patagonia to the Upper MI - 

 ssouri one finds Opuntiae» . 



The genus Echinopsis has been created by Zuccarini after the 



