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THE DISTRIBUTION OF THE FLORA IN THE ALPINE ZONE.

THE DISTRIBUTION OF THE FLORA IN THE ALPINE ZONE. THE DISTRIBUTION OF THE FLORA IN THE ALPINE ZONE.' BY PAUL JACCARD, Professor at the Federal Polyteehnic, Ziirich. [WITH TWO TEXT-FIGS.] ^HE botanising hitherto done in the Alps gives us but very imperfect information on the local distribution of the alpine flora. Attention has been specially directed to rare plants, whose least localities are recorded, while the common species are often neglected. But from the standpoint of the factors which regulate distribution the common species are the most important. The rare species of the alpine flora, those which appear only in a few isolated stations, sometimes only in a single one, are usually either species with a very sporadic general distribution, or they are endemic species, or finally they may be " glacial relicts." All these categories are of great interest from the standpoint of the history of floras ; their presence in the stations which they now occupy is explained not only by the ecological conditions they find in these stations, but also by historical causes, and especially by the conditions of post-glacial immigration. ^ This article is translated from the French original (which appeared in the Revue geiie'rale des Sciences, 15th December, 1907, pp. 961—967) and http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png New Phytologist Wiley

THE DISTRIBUTION OF THE FLORA IN THE ALPINE ZONE.

Jaccard, Paul
New Phytologist , Volume 11 (2) – Feb 1, 1912
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Publisher
Wiley
Copyright
Copyright © 1912 Wiley Subscription Services, Inc., A Wiley Company
ISSN
0028-646X
eISSN
1469-8137
DOI
10.1111/j.1469-8137.1912.tb05611.x
Publisher site
See Article on Publisher Site

Abstract

THE DISTRIBUTION OF THE FLORA IN THE ALPINE ZONE.' BY PAUL JACCARD, Professor at the Federal Polyteehnic, Ziirich. [WITH TWO TEXT-FIGS.] ^HE botanising hitherto done in the Alps gives us but very imperfect information on the local distribution of the alpine flora. Attention has been specially directed to rare plants, whose least localities are recorded, while the common species are often neglected. But from the standpoint of the factors which regulate distribution the common species are the most important. The rare species of the alpine flora, those which appear only in a few isolated stations, sometimes only in a single one, are usually either species with a very sporadic general distribution, or they are endemic species, or finally they may be " glacial relicts." All these categories are of great interest from the standpoint of the history of floras ; their presence in the stations which they now occupy is explained not only by the ecological conditions they find in these stations, but also by historical causes, and especially by the conditions of post-glacial immigration. ^ This article is translated from the French original (which appeared in the Revue geiie'rale des Sciences, 15th December, 1907, pp. 961—967) and

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New Phytologist – Wiley

Published: Feb 1, 1912

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