N. Vietnam, Prov. Quang Binh, distr. Minh Hoa, 72 km to NWW from Dong Hoi, municipalite Thong Hoa, vicinities of Yen Son village, limestone massif Ke Bang (N 17°40′ E 105°57′). Remnant open evergreen primary broadleaved forest along river in alluvial valley bottom between limestone ridges and mesas at 200 m alt. Woody fern 0.2-0.3 m hg with fronds 1.5-1.8 m lg in wet open place. Not common. VH 4716 17.05.1997 International Botanical Expedition of the U.S.A. National Geographic Society (grant No 5803-96)
Coordinates (geographic position):17° 40′ N, 105° 57′ E ±1000 mRecord creation: 2022-01-18, Galina Savich, PhotoScan D2Citation: Specimen LE 01068284 // Virtual herbarium of Komarov Botanical Institute RAS — http://re.herbariumle.ru/01068284