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sprouted late and had very delicate leaves. I will soon send you enough Ulmus peduncu - 

 lata. This variety, related to Americana , is very constant in leaf-form, hairiness, 

 fruit-bloom, and offers no dif ficulties. Young it cannot be dif ferentiated from Americana . 

 However U. Montana t related to fulva , is a little known species and has various forms, 

 but many forms has campestris a more southern variety, which in Bohemia grows only in 

 the middle Elbe River (otherwise everything Montana ) . 



The elras are known little by the forest ers, not at all by the botanists; generally 

 the more abundant one in an area is called Campestris « I will send you some of all that 

 I have as soon as the leaves have become more hardy, because now the characteristic 

 difference in the leaf substance does not appear. With 1 part glycerine, 2 parts 

 water, addition of some calicylic acid or carbolic acid one keeps Picea , Tsuga ,, Lanix , 

 Cedrus branches from having the needles fall off (or from losing their needles); 

 probatum est.; naturally not very practicable on trips. Immersing for one hour is 

 sufficient. The longer, that much more firmly the needles will hold, but that much more 

 their color will change. It would be nice if you could collect wood in California, 

 perhaps one can still find differences in the strains. P. Bungeana and Gerandiana , 

 aecording to the cones, are certainly no Cembra or Strobus but to a great degree are 

 similar to the longifolia nevertheless it seems so to me, as if not a hacked shield, 

 unbilicated in the center as with uncinata , but more as with Koraiensis a scale umbili- 

 cated beaked at the end, is present. The wood would also be very important here. After 

 I first have my Pinus needles out, then no doubt further material will be found, whereof 

 there is plenty in England. Wishing you good luck on the trip, I am, 



Respectfully, 

 Dr. E. Purkinje 



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