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1 April 2012 The Rare Moss Didymodon johansenii (R.S. Williams) H.A. Crum in the Italian and Austrian Alps
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Abstract

Didymodon johansenii (R.S. Williams) H.A. Crum is recorded for the first time for Italy from the Brenta Dolomites of the Southern Alps, Province of Trento. In addition, a series of unpublished records from the Austrian Alps are presented and the known distribution of the species in Central Europe is mapped. The differentiation of the species, which is well-characterized among European species by a swollen, deciduous leaf apex, is discussed. D. johansenii is a cryophilous xerophyte, usually growing in full sun on S-facing rock walls of limestone and calcareous schist in the subalpine and alpine belt of the Alps. It probably belongs to a series of bryophyte species with Central Asian origin which reached the Alps by crossing the cold steppes during the glacial maxima of the Pleistocene.

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Daniel Spitale, Juan A. Jiménez, and Heribert Köckinger "The Rare Moss Didymodon johansenii (R.S. Williams) H.A. Crum in the Italian and Austrian Alps," Cryptogamie, Bryologie 33(2), 141-147, (1 April 2012). https://doi.org/10.7872/cryb.v33.iss2.2012.141
Received: 29 April 2011; Accepted: 1 August 2011; Published: 1 April 2012
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