Pteridophytic Flora of Rajasthan A Review

About 63 species belonging to 29 genera of pteridophytes have till date have been reported from Rajasthan dating from kings Sketch of flora of Rajputana 1878 79 . But an exhaustive survey of all pteridophytic localities during different seasons of the year during the past decade 1975 85 has revealed the occurrence of many species belonging different genera. Thus, Athyrium hohenockerianum, Asplenium lanulatum, Cheilanthes belangeri, Botrychium lanuginosum, Dryopteris parasitica, Pityrogramma calomelanos, Pteris cretica and Athyrium parasnathense are seen. This may be regarded as a clear indication that these taxa have recently been lost eradicated from Rajasthan due to one factor or the other. It has also been regularly observed that the population densities of many of the present day. Rajasthan pteridophytes have been decreasing at an alarming rate specially in respect to such restricted taxa as Asplenium pumilum var. hymenophylloides, Selaginella rajasthanensis, Isoetes reticulata, I. rajasthanensis and Marsilea aegyptiaca. Similarly, populations of some ferns growing at Mt. Abu like Ophioglossum gramineum, Araiostegia pseudocystopteris, Pteris vittata, Dryopteris cochleata and Nephrolepis cordifolia are also becoming thin and localised and reported as seriously rare taxa of Mt. Abu. Seriousness and severity of the threat to pteridophytic flora of this region is emphasized specially because of the scantier floristic resources of the state. Adiantum recurvatum D.Don Fras. -Jenk is a new record to the pteridophytic flora of Rajasthan. Shri Praveen Kumar Chandel "Pteridophytic Flora of Rajasthan: A Review" Published in International Journal of Trend in Scientific Research and Development (ijtsrd), ISSN: 2456-6470, Volume-6 | Issue-3 , April 2022, URL: https://www.ijtsrd.com/papers/ijtsrd49487.pdf Paper URL: https://www.ijtsrd.com/biological-science/botany/49487/pteridophytic-flora-of-rajasthan-a-review/shri-praveen-kumar-chandel