The Genus Pinus

The Genus PinusThis discussion of the characters of Pinus is an attempt to determine their taxonomic significance...
€6,34 EUR
€6,34 EUR
SKU: gb-26798-ebook
Product Type: Books
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Author: Shaw, George Russell,1848-1937
Format: eBook
Language: English
Subtotal: €6,34
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The Genus Pinus

The Genus Pinus

€6,34

The Genus Pinus

€6,34
Author: Shaw, George Russell,1848-1937
Format: eBook
Language: English

The Genus Pinus

This discussion of the characters of Pinus is an attempt to determine their taxonomic significance and their utility for determining the limits of the species. A systematic arrangement follows, based on the evolution of the cone and seed from the comparatively primitive conditions that appear in Pinus cembra to the specialized cone and peculiar dissemination of Pinus radiata and its associates. This arrangement involves no radical change in existing systems. The new associations in which some of the species appear are the natural result of another point of view. Experience with Mexican species has led me to believe that a Pine can adapt itself to various climatic conditions and can modify its growth in response to them. Variations in dimensions of leaf or cone, the number of leaves in the fascicle, the presence of pruinose branchlets, etc., which have been thought to imply specific distinctions, are often the evidence of facile adaptability. In fact such variations, in correlation with climatic variation, may argue, not for specific distinction, but for specific identity. The remarkable variation in the species may be attributed partly to this adaptability, partly to a participation, more or less pronounced, in the evolutionary processes that culminate in the serotinous Pines. 1 ......Buy Now (To Read More)

Product details

Ebook Number: 26798
Author: Shaw, George Russell
Release Date: Oct 7, 2008
Format: eBook
Language: English

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Illustrator: Shaw, George Russell, 1848-1937

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