Psilotum hazaricum a new contribution to the flora of Pakistan
Paper Details
Psilotum hazaricum a new contribution to the flora of Pakistan
Abstract
Psilotum species, is of considerable importance in palaeobotany considering its age of evolution i.e. Devonian. P. hazaricum is a new contribution to the cryptogamic Flora of Pakistan. The population of P. hazaricum is restricted to the rock crevices in Nandiar Khuwar catchment area. The aerial stem is hexagonal, with alternate phylotaxy and bifid bracts of synangia on aerial shoot. Synangia borne alternately above fourth dichotomy. The anatomy of stem, leaf and synangia were studied. Spores are raniform to oval. The population size was affected due to habitat loss, introduction of exotic species as well as the growth of native species in same rock crevices, and therefore conservation of this species is suggested in Nandiar valley and adjacent localities having same type of environmental conditions.
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