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.
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Dedicated to Prof.K. H. Rechinger on the occasion of his 80th birthday.
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Knapp, H.D. On the distribution of the genusCousinia (Compositae) . Pl Syst Evol 155, 15–25 (1987). https://doi.org/10.1007/BF00936283
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DOI: https://doi.org/10.1007/BF00936283