That is, with C, lateralis i^always points North and with 

 flavisplanu s into various directiors t Also interessting ! With some 

 Pilocerei flowers arise frora older, with others from the top-most 

 areoles;and with some the flowering part of the raten is marked on- 

 ly throuprh the wool;wlth others (as with my C. Schottll ) the entire 

 fl owering section is bullt dif^erert, and for Schott! i mueh more an- 

 gular and the areoles positioned mich closer. 



Barely do you mention the number of scales on the ovary or even 

 the nunber of sepals and petals.which seeras however important; do 

 not miss the length of the free spj^e at the base of the tube;form 

 and length of Stigmata (thick, , thin,blunt, pointed ). Did. 



von dry flowers, spine-bundles, crosscuts, pieces of fruit t Do you 

 have drawings of plant s in. bloom ? You have seen so nany species, 

 that you can. ßcroup then better than a^ybody eise; you should 

 this,and rely thereby more on flowers, fruits and seeds than the ve- 

 getative parts« 



Be sure to observe the geographica! distribution as to expanse 

 and altitude. But renenber , that only the langer mexicar eitles are 

 o-e^erally known and that travellers mostly refer irresponsi^Jy to 

 snall villages or hacienda s , which nobody can find again easily. 



Höw sad, as we hear fron our newspapers, that your time in Me- 

 xico will come to an end this year. For Maximilian, I fear, things 

 are worse« - 



Is there in Mexico another French or Austrian off leer who 

 is interested in botany , speci^lly in Cacti ? How do you plan to 

 publish your obser^ations ? Do you se^d seeds to Europe and to whonr? 



Write to me as often as time permits. Did you reeeive my letter 

 of May k ? 



Still more questions, which Game to mlnd while going through 

 your descriptions. Pil .cetensis fruit really naked ? How is the ova- 



