-2- 



It appears to be alpine because all habitats lie very high, to over 2000 meters. Resion - 

 osa is surely not to be placed directly under the old worldly with subcutaneous resin 

 ducts, since in regard to the vascular bündle epidermis, it completely resembles the 

 American and also the 2 resin ducts are placed differently. When one takes out 



the excelsa, which is near the strobus, then basically they are the pines of every floral 

 district of West America, Mexico, East-America, Southern States, Canaries, Mediterranean, 

 North Central Europe, Siberia, East-Asia, India, entirely different from each other, even 

 when in the resin ducts they show similarities, like halepensis and densiflora, and 

 within a floral district there again are entirely Singular groups like Pinea in the 

 Mediterranean, Gerardiana and Bungeana (which probably are identical) in Asia. The 

 latter is, other than in position of the resin ducts, in everything, parenchyma, branch 

 bark, sheath, a cembra more than strobus • 



Devotedly, 



Dr. E. Purkinje 



I surmise that I have not written to you for a long tirae and have not thanked you 

 for the American firs, the junipers, the number of the Botanical Gazette with your 

 treatise about Catalpa speciosa and the second shipment of seeds of the latter* I have 

 studied the things with interest. I will only get to Abies when I am finished with 

 Pinus, which probably will still be some time. Have you studied the forms of ülmus 

 fulya in America? I surmise various kinds, above all one with small leaves, dark bark 

 according to the herbarium specimens which I saw. Your seeds of U. Americana all germi- 

 nated, of fulva few, atata I do not yet have. Is Celtis crassifolia at home in America 

 and where? Here in general one has several varieties like Celtis scabra, Audibertis , 

 condifolia, which belong to occidentalis, however their habitat in America is not known. 

 From America I grew seed which I received from St. Petersburg, a Celtis which had 

 strongly serrated, rough large leaves and looks similar to the European C. australis 

 as the form which here is considered as typical C. occidentalis with weak and slightly 

 serrated, thick skinned, smooth small leaves. 



Your note regarding the acorns interested me very much; as far as I know the Cali- 

 fornia varieties are not at all in cultivation in Europe, however probably some Mexican 

 ones are, e.g. insignis . The extremely severe winters here, as on the whole in all of 

 middle Europe (not in Russia and Scandinavia) terribly cleared away most of the California 

 ones. If not everything that has red needles is completely dead, at any rate it looks 

 horrible. Taxodium sempervirens, Thuja gigantea , Juniperus virginiana Abies concolor, 

 Pihsapo, Chamal Cyparis sphaeroidea , have suffered very much, old Pseudotsuga Douglasii 

 little, however young ones very much, Abies cephalonica tipica not more than the native 

 pectinata, Nordmannana Fraseni cephalous pelopennesiaea not at all, likewise Thuja 



