Abstract
The fern species Polystichum polyodon Ching (1936: 93) of Dryopteridaceae is endemic to North East India (Arunachal Pradesh, Manipur, Meghalaya) and expected to occur in Myanmar and South West China (Ebihara et al. 2012). Wallich (1832) first named it as Polypodium polyodon Wallich (1832: 241) nom. nud.; Christensen (1906: 555; 1930) considered it as synonym of Polystichum hookerianum (Presl 1836: 77) Christensen (1906: 582). Ching (1936) separated it as P. polyodon and recently Ebihara et al. (2012: 119) placed it in Phanerophlebiopsis Ching (1965: 115) as Phanerophlebiopsis polyodon (Ching) Fraser-Jenk. in Ebhara et al. (2012: 119) due to its long narrower pinnae and sori in more than one row.