lowlands of W. Malesia form

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lowlands of W. Malesia form


Asia-Temperate: China Southeast (Hong Kong present); Hainan (Hainan present), Asia-Tropical: Borneo present; Malaya present; Thailand (Thailand present)
Plants like the lowland form of Malaya occur in Thailand, Hainan and Hong Kong, also in the lowlands of Borneo.


In Malaya there seems to be no sharp distinction between the mountain form and the lowland one.
Blume distinguished varieties B and C in Java. I have found no authentic specimen of the former; var. C has rather large almost sterile fronds with sori on basal veins only and is not a distinct variety.