New species and records of grammitid ferns (Polypodiaceae) for Vietnam Author Parris, Barbara Fern Research Foundation, 21 James Kemp Place, Kerikeri, Bay of Islands 0230, New Zealand Author Chen, Cheng Wei Department of Molecular and Cellular Biology, National Tsing Hua University, Hsinchu 30013, Taiwan Author Hsu, Tian Chuan Department of Molecular and Cellular Biology, National Tsing Hua University, Hsinchu 30013, Taiwan Author Lu, Thi Ngan Department of Biology, Vietnam National Museum of Nature, Vietnam Academy of Science and Technology, 18 Hoang Quoc Viet, Hanoi, Vietnam Author Nguyen, Quoc Dat Southern Institute of Ecology, Vietnam Academy of Science and Technology, Ho Chi Minh City, Vietnam Author Luu, Hong Truong Southern Institute of Ecology, Vietnam Academy of Science and Technology, Ho Chi Minh City, Vietnam text Phytotaxa 2015 2015-09-09 226 1 39 50 http://dx.doi.org/10.11646/phytotaxa.226.1.4 journal article 10.11646/phytotaxa.226.1.4 1179-3163 13636212 Themelium halconense (Copel.) Parris Basionym: Polypodium halconense Copel. (1907: 138) . Type:— PHILIPPINES . Mindoro, Mt Halcon, elev. 2300 m , November 1906 , Merrill 5976 ( lectotype MICH ! here designated). Additional specimens examined :— VIETNAM . Lam Dong Province : Lac Duong District, Da Chays Commune, 29 km NE of Dalat city, main Bi-Doup ridge, N12°06’ E108°39’ , elev. 1900–2100 m , 22 March 1997 , Averyanov, Binh & Loc VH 3086 ( P , image seen). Distribution :— Vietnam , Borneo ( Sabah , Sarawak ) and Philippines . Taxonomic note :—The rather widely creeping rhizome with grey-brown scales and the serrated pinnae distinguish this species from other grammitids in Vietnam .