Lomariopsis longini L.Y.Kuo & Y.H.Wu, 2021

Wu, Yi-Hsuan, Sun, Chih-Yun, Ebihara, Atsushi, Lu, Ngan Thi, Rouhan, Germinal & Kuo, Li-Yaung, 2021, Two new species in the fern genus Lomariopsis (Lomariopsidaceae) from East Asia, PhytoKeys 187, pp. 161-176 : 161

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.

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 × 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 × 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 × 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.

Figures

Figure 2. Illustration of Lomariopsis longini L. Y. Kuo & Y. H. Wu, sp. nov., based on the holotype P. K. Loc et al. 5095 (P 00888363).

Figure 5. Stipe scales A Lomariopsis longini (L. Y. Kuo 1862, TAIF) B Lomariopsis moorei (Y. H. Wu YX 052, TAIF). Scale bar: 1 mm.