Ahmedullah, M. and M.P.Nayar: Endemic Plants of the Indian Region. Volume 1: Peninsula Flora. 1987. many illustr. (line-drawings). black & white pls. 5 col.pls. XII,263 p. gr8vo. Cloth.

Endemic floristic elements of a country of a geographical region throwlight on the biogeography of the area, centres of speciation, areas ofvicariance and adaptive evolution of the flora. Since endemic elementshave restricted distribution from the conservation point of view, theyare of great interest. In any biologically evolving system, whereevolution sets in motion, extinction of the unfit in the process ofnatural selection is a biological necessity. However, the present daychanges in the habitat and environment, are so unnatural, the speciescould not get evolutionary time span for survival or adaptive radiation.Monitoring the population of endemic and rare species is important.There are procedures of analysing and categorising species. Extinct,Endangered, Vulnerable, Rare. These categories are discussed. Sometimestaxa formerly included in one of the above categories sustain andincrease the population level due to effective conservation measurestaken. Then these taxa become "Out of danger".