Najas

Najas, the water-nymphs or naiads, is a genus of aquatic plants. It is cosmopolitan in distribution, first described for modern science by Linnaeus in 1753. Until 1997, it was rarely placed in the Hydrocharitaceae, and was often taken as constituting (by itself) the family Najadaceae. The APG II system, of 2003 (unchanged from the APG system, of 1998), places the genus in family Hydrocharitaceae, in the order Alismatales of the monocots. An infrageneric classification of two sections is proposed: Section Americanae and sect. Caulinia. Species Najas affinis Rendle - South America, Senegal, Guinea-Bissau Najas ancistrocarpa A.Braun ex Magnus - China, Japan, Taiwan Najas arguta Kunth - Cuba, Costa Rica, Panama, South America Najas australis Bory ex Rendle - India, Madagascar, Mauritius, KwaZulu-Natal, Seychelles Najas baldwinii Horn - West Africa Najas brevistyla Rendle - Assam Najas browniana Rendle - southern China, India, Taiwan, Java, Cavern Island in Northern Territory of Australia ......read more on Wikipedia.