Two new species in the fern genus Lomariopsis (Lomariopsidaceae) from East Asia Author Wu, Yi-Hsuan Institute of Molecular & Cellular Biology, National Tsing Hua University, No. 101, Sec. 2, Guangfu Rd., Hsinchu City, Taiwan Author Sun, Chih-Yun Department of Life Science, National Tsing Hua University, No. 101, Sec. 2, Guangfu Rd., Hsinchu City, Taiwan Author Ebihara, Atsushi https://orcid.org/0000-0002-7380-3598 Department of Botany, National Museum of Nature and Science, Amakubo 4 - 1 - 1, Tsukuba, Ibaraki, Japan Author Lu, Ngan Thi Department of Biology, Vietnam National Museum of Nature, Vietnam Academy of Science and Technology, 18 Hoang Quoc Viet, Hanoi, Vietnam & Graduate University of Science and Technology, Vietnam Academy of Science and Technology, 18 Hoang Quoc Viet, Hanoi, Vietnam Author Rouhan, Germinal https://orcid.org/0000-0002-0751-5352 Institut de Systematique, Evolution, Biodiversite (ISYEB), Museum national d'Histoire naturelle, CNRS, Sorbonne Universite, EPHE, Universite des Antilles; CP 39, 57 rue Cuvier 75005 Paris, France Author Kuo, Li-Yaung https://orcid.org/0000-0002-3388-3757 Institute of Molecular & Cellular Biology, National Tsing Hua University, No. 101, Sec. 2, Guangfu Rd., Hsinchu City, Taiwan & Department of Life Science, National Tsing Hua University, No. 101, Sec. 2, Guangfu Rd., Hsinchu City, Taiwan lykuo@life.nthu.edu.tw text PhytoKeys 2021 2021-12-20 187 161 176 http://dx.doi.org/10.3897/phytokeys.187.77035 journal article http://dx.doi.org/10.3897/phytokeys.187.77035 1314-2003-187-161 DC7810C8C60A5925943D1BB2EAA7F25A Lomariopsis longini L.Y.Kuo & Y.H.Wu sp. nov. Figs 2 , 5A Diagnosis. Lomariopsis longini differs from the other similar species, L. spectabilis , L. boninensis , and L. moorei , by its lanceolate upper sterile pinna with the widest portion occurring below the middle of the pinna, and the veins end ca. 0.5 mm before the margins. Figure 2. Illustration of Lomariopsis longini L.Y.Kuo & Y.H.Wu, sp. nov., based on the holotype P.K. Loc et al. 5095 (P00888363). Type . Vietnam . Ha Tinh . Huong Son District : Son Kim Municipality , Rao Bun stream, 4 May 2004 , P.K. Loc 5095 ( holotype : P [P00888363]! isotype: MO!) . Description. Rhizomes stramineous, 0.7-1.2 cm in diam., densely scaly; rhizome scales brown (but blackened at point of attachment), lanceolate, ca. 4-9 x 1.5-3.7 mm. Fronds 1-pinnate, leathery, mature laminae pinnate, dimorphic. Sterile fronds 30-60 cm long, stipes stramineous, 10-20 cm, grooved adaxially, base with scattered scales, lateral pinnae 3-9 pairs, lanceolate, widest in the lower third, 7-16 x 1.5-1.7 cm, apex acuminate; pinna bases cuneate and decurrent, margins entire; lateral pinnae articulate to rachis, swollen ring on abaxial articulation, terminal pinna with a similar size as lateral pinnae, not articulate; upper part of rachis narrowly winged; veins free, simple or furcate, oblique, not extended to margin. Fertile laminae similar to sterile laminae but pinnae much contracted; pinnae linear, 10-20 x ca. 0.2 cm, equilateral, stalks 0.5-1.1 cm, pinna rachis articulate. Sori acrostichoid. Spores 32 per sporangium, perine with cristae. Paratypes. Vietnam. Nghe An Province: 28 Oct 2014, L.B. Zhang, L. Zhang & N.T. Lu 7185 (CDBI, MO, VNMN); Quang Binh Province: Bo Trach District, Phong Nha-ke Bang National Park, 7 Dec 2004, S.K. Wu and L.K. Phan WP897 (KUN); 13 Dec 2004, WP1124 (KUN); Quang Tri Province: Dakrong District, Trieu Nguyen Commune, 4 Nov 2009, Y.H. Chang 20091104-005 (TAIF); 2 Nov 2009, C.W. Chen Wade 983 (TAIF); Vinh Phuc Province: Tam Dao District, Tam Dao National Park, 14 Dec 2010, L.Y. Kuo 1862 (TAIF, VNMN). China. Yunnan Province: 25 Aug 2014, Q. Wei WQ243 (KUN); 2 Sep 2011, S.Y. Dong 3597 (IBSC); 28 Mar 1987, W.M. Ju et H.C. Yan Ju and Yan 21930 (IBK). Distribution. Northern Vietnam, west southern China (Yunnan). Ecology. In shaded places, understory of evergreen broad leaf forests, below 1,000 m in elevation. Etymology. The lanceolate shape of the terminal pinnae of sterile leaves is similar to the holy lance, which is also called Lance of Longinus.