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Plant Systematics and Evolution

, Volume 155, Issue 1–4, pp 15–25 | Cite as

On the distribution of the genusCousinia (Compositae)

  • H. D. Knapp
Article

Abstract

On the basis of new floristic works a distribution map of the genusCousinia is given and discussed. The generic distribution area ofCousinia is nearly identical with the Irano-Turanian Region, but most of the 662 species are concentrated on the Iranian and Turkestanian mountain regions. Here, both in the eastern and in the western parts of the distribution area, four centres of diversity with high numbers of—mostly endemic—species are found: The western Tienshan (61 species), Pamiro-Alaj (169), NE-Afghanistan (80), NW-Afghanistan (44); Kopetdagh (66 in Iran, 33 in Turkmenia), Elburz (66), the northern part of Zagros (44), Azerbaijan (36). The outlines of the generic area are formed by genetic-historical and by climatic factors. The distribution patterns ofCousinia species confirm the close connections between the Iranian and the Turkestanian mountains as centres of origin and conservation of palaeo-xeromorphic mountain floras, contrasting with the Turanian lowland flora.

Key words

Angiosperms Compositae Cousinia Generic distribution map centres of diversity distribution patterns Flora of the Irano-Turanian Region Flora of SW. Asia of Iran Iraq Afghanistan Pakistan 

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Copyright information

© Springer-Verlag 1987

Authors and Affiliations

  • H. D. Knapp
    • 1
  1. 1.Waren/MüritzGerman Democratic Republic

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