Arr. . June 17 

 Ans. July 18 



Dr. E. Purkynje 



We isswasser, Bohemia" 

 May 27., 18?8 : 



Most honored Sir and Patronr ! 



I thank you'very mich for the elmr' seeds, which, as I see justr 



now, , are alreadyvgerminating, be cause they are very fresh. The Arizo- 



652 



na Pine, similar to Montezuma r , .belongs certainlyvto ponderosa or 

 Coulteri j of which I am not yett certairr, because the needles sent by 

 you of wild Coulteri ' belong to tx*o distinctly different specieff, of 

 which one appears also witfr your* ponderosa, or at least similar. You 

 sent me an Ag j^cahuite from Ehrenberg und er number 645 (in tiny let- 

 ters, inserted by Dr. Engelmann: I have 647, E.D.); I did not receive 

 any under 654 (in tiny letters, inserted by Dr.Engelmanm : 654 Rotte- 

 rich is flexilis var. reflexa", E.D.). The 645 is definitely not fle- 

 xilisj because, like all true forms of Strobus, it has no stomata on- 

 the upper surface, whereas flexilis as well as the nut-pine, has some 

 there. (see sketch of original letter,E. D. ) .By the way t , P. Buonapar- 

 tea a nd Don Pedri Roecl are entirely different from Agucahuite througfr 



very many/ rosin*' canals r , which otherwise do not occur in any Strobus,, 



two — *~ 



which possessjat the most 3 rosin canals, namelyy Lambertiana, . mon- 



ticola,pygmaea c ( no form of Cembra , pa rvi f ol i a , excelsa, , Pence, . Strobus).; 

 What concerns Nö.. 783.lt is probably not flexilis-, but its own Spe- 

 eles of the Strobus groupy or a bastard of the flexilis; with a fornr 

 of Strobus. It seems to me with certairr cross-cuts, that it has a line 

 off, stomata on the upper surface, but I must examine this more exactly.. 

 IT there are bastards with you, I do not know. In Europe there occur 

 bastards of Laricio and s ilvestris, and the one sent by you Hei dreiz- 

 ehn-- Christ from Olympus, is such a bastard, which has been described 

 already earlier by Antoine as P . leuc odermi s from Montenegros, and which- 

 I reeeived also from Serbia (today Jugoslavia,E. D. ) . . This plant has 

 cones similar to slivestris, and , also the bark>, , but 1 male catkins 

 and the needles similar to Laricio, the wood di verging from both^.very 



