Polycnemum majus (Chenopodiaceae): A Disappearing Species in Czechoslovakia: Its Taxonomy, Distribution and Karyology

Polycnemum majus A. Br. (Chenopodiaceae) represents one of the Euro-Asian species disappearing as a consequence of man's activities. The paper presents a brief survey of its morphology, distribution (with emphasis on the W part of Czechoslovakia), and taxonomy. The ecological characterization o...

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Bibliographic Details
Published in:Folia geobotanica & phytotaxonomica 1991-09, Vol.26 (3), p.341-347
Main Authors: Pavel Tomšovic, Anna Krahulcová
Format: Article
Language:English
Subjects:
Biological taxonomies
Endangered species
Genera
Habitats
Hexaploidy
Plant chromosomes
Plants
Ploidies
Polyploidy
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Summary:Polycnemum majus A. Br. (Chenopodiaceae) represents one of the Euro-Asian species disappearing as a consequence of man's activities. The paper presents a brief survey of its morphology, distribution (with emphasis on the W part of Czechoslovakia), and taxonomy. The ecological characterization of communities with occurrence of P. majus is given. From the karyological point of view, P. majus represents a further case of hexaploidy in the Chenopodiaceae family, hitherto known in approximately 10% of genera. The basic chromosome number of x = 9 is proposed, with respect to chromosome numbers ascertained in P. majus for the first time (2n = 54) and in P. arvense (2n = 18). The annual hexaploid species P. majus was proved to be potentially self-fertile.
ISSN:0015-5551
1573-1170
DOI:10.1007/BF02912754