3 « Prince Salm 



Feb. ?,. 18.52 



of the seeds, the enhr^o, the Albuinen, Your Wellborrr have labored 

 hard, ^it^out , however, bein.<? able to f ormulate a general rule. I have 

 used in. my work whatever could be used' of the dif feiert characters, 

 which the seeds off er, when such could be attributed to the e^tire 

 tribus or en entire pnus, - As to an. exact d etomiratiorr of the 

 habi tat of many species, we do not have a map of the territories there,» 

 with indications of the boundaries of Texas, New or^i^fcls, New M e- 

 xieo, California* Errors of this kind are unavoid able«- The identi- 

 ty of my C,, Pottsii with yo 1 ^ C « r "^g£rii I have taker fron your des- 

 criptiorr (Memoir p. 102). - Dr. Gerhardi' unf ortunately ! did not 

 hrin?r me anything-» . He did send a small case, as promisedr, to ne; but 

 this did not arrive. . - Of the travels of Mr..Fresul, and of what he 

 brought with him, I heard nothing in faris. But I could Visit the bo- 

 tanical garden there only very haphazardly* I did see H. ^.^c^o^eris: 

 I do not know, if it too was int^oduced through Trecul . - Mr. Posch- 

 ger brought good items along; several. however, which were already known 

 through Potts. Chihuahua belongs still to Mexico. What is this area 

 callled ? Is it North-Mexico, and is the adjoining territory (now 

 american) named New Mexico ? and, when one speaks of Mexico, does 

 one say Regnun cmexicanum or Republica maxicana T The form of govern- 

 ment there c hange s so of ten, that one hardly knows, which one is the 

 last one.. - My Echinoc» . lophothele was sent first to us by Mr. Potts 

 a^d also appears with the plant s of Po selber, and is naned Ech.rin - 

 conensi s. The d i agn o si s i s : 



rt S caule deprresso subpla centi forme rrlauco verti ce lanata 

 16 cos^ato, costis subo bliquis sinuato- reponiis ad pul vi 11 os tuber» 

 / cnlatos riorrasatis, tuber culis mamwaef ormibus valde nro nirulis zo - 

 motis obtusi s, pulvüiis immer sis junioribus lanatis raox griseo - 

 t om e n t o s i s . a c ul e i s 4 elongatis ratidis rigidissimis pupureo- brum- 

 neis d.ecussatim dispositis infimo ratidiore,, cum advertitiis sum- 



