Beitrag
Phytogeographic Observations on Himalayan Ferns
Dhir, K.K.; Saiki, Y.
Nova Hedwigia Band 39 Heft 1-2 (1984), p. 169 - 175
25 Literaturangaben
veröffentlicht: Jul 6, 1984
DOI: 10.1127/nova.hedwigia/39/1984/169
ArtNo. ESP050003901009, Preis: 29.00 €
Abstract
The fern flora of the Himalayas consists of 12% endemics, 45% Sino-Japanese element, 19% Indo-Malayan element, 7% Mediterranean element and 17% pantropical ferns. The Sino-Japanese element is well represented, especially in the higher ranges, the chief causal factor probably being easy dissemination of the light spores. The next best represented is the Indo-Malayan element which occurs chiefly in the humid and shady environments prevailing in the sub-tropical forests of the eastern Himalayas. The western Himalayas exhibit somewhat lesser number of endemics than the eastern Himalayas. A critical appraisal reveals the predominant influence of the Mediterranean element on the West and Sino-Japanese and Malayan elements on the East. The Kumaon region seems to be abutting the distributional limits of these floras which have intimately wedged into each others’ territory here. This intermingling of the species has obviously been favoured by the climatological factors coupled with geographical aspects.
Schlagworte
fern flora • Sino-Japanese element • spores • endemics • distributional limits • Himalaya