Lomariopsis moorei Y.H.Wu & L.Y.Kuo, 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 moorei Y.H.Wu & L.Y.Kuo sp. nov.

Figs 3 , 5B , 6A

Diagnosis.

Lomariopsis moorei is most similar to L. boninensis , but scales on stipes are narrower (usually <2 mm) in L. moorei (Fig. 5B ) and broader (usually> 2 mm) in L. boninensis . The swollen ring at the region of articulation on the abaxial side (especially upper pinnae) is more obvious in L. moorei (Table 1 ; Fig. 6A ).

Type.

Taiwan. Chiayi County: Dapu Township, Zengwen Reservoir , 9 November 2020, Y.H. Wu YX052 (holotype: TAIF! isotype: TAIF!) .

Description.

Rhizomes rufous, 1.0-1.2 cm in diam., densely scaly; rhizome scales reddish brown (but blackened at point of attachment), narrowly lanceolate, ca. 4-6 × 0.9-2.2 mm. Fronds 1-pinnate, leathery, juvenile sterile laminae simple, shortly stalked, narrowly lanceolate, 20-25 × 1.0-1.5 cm, base narrowly cuneate, apex acute; mature lamina pinnate, dimorphic. Sterile fronds 30-50 cm long, stipes green, 10-20 cm, grooved adaxially, base with scattered scales, lateral pinnae 6-14 pairs, 1-5 cm apart, narrowly lanceolate, widest in the proximal half, 14-21 × 1.5-2.2 cm, narrowly cuneate, apex acute, base cuneate and decurrent, margin entire or slightly undulate; lateral pinnae articulate to rachis, swollen ring on abaxial articulation, terminal pinna 16-27 × 1.5-2.2 cm, not articulate; upper part of rachis narrowly winged; veins free, simple or furcate, oblique. Fertile laminae similar to sterile laminae but pinnae much contracted; pinnae linear, 10-20 × ca. 0.3 cm, equilateral, pinna rachis 0.3-0.8 cm wide, rachis articulate. Sori acrostichoid; perine consisting with glandular projections. Spores green (= chlorophyllous) and spiny, 64 per sporangium.

Paratypes.

Taiwan. Chiayi County: Dapu Township, Zengwen Reservoir, 9 Nov 2020, Y.H. Wu YX053 (TAIF). China. Hainan Province: Wuzhishan City, Mt. Wuzhi National Nature Reserve, 16 July 2007, Y.S. Chao 1211 (TAIF); Mt. Diaoluo, 27 Feb 2012, W.H. Wu 1062 (TAIF); 21 Nov 2000, G.M. Zhang et D. Li 117 (PE); 14 Dec 2003, S.Y. Dong 1045 (PE).

Distribution.

Taiwan (Chiayi County) and China (Hainan Is.).

Ecology.

In shaded places, understory of evergreen broadleaf forests, below 1,000m in elevation.

Etymology.

The name moorei is dedicated to Dr./Mr. Shann-Jye Moore (1966-2010), an enthusiastic fern taxonomist and knowledgeable pteridologist from Taiwan. The Mr. Shann-Jye Moore Memorial Scholarship has been established by the Taiwan Society of Plant Systematics to commemorate his passions, and to support Taiwanese students studying the systematics of ferns and lycophytes.

Note.

We have not yet found entire sporophyll from the type locality, but fallen fertile pinnae on14 Aug 2020 (Fig. 3 ), which contained intact sporangia with green spores. Although mature sporophytes were found to have a restricted distribution in Taiwan, independent gametophytes of this species were found throughout Taiwan Main Is using a DNA-identification approach to survey gametophyte populations ( Wu et al. in press).

Figures

Figure 3. Illustration of Lomariopsis moorei Y. H. Wu & L. Y. Kuo, sp. nov., based on the holotype Y. H. Wu YX 052 (TAIF). A fallen fertile pinna is at the left bottom.

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.

Figure 6. Articulation of upper pinnae (abaxial surface) to the rachis A Lomariopsis moorei (Y. H. Wu YX 052, TAIF) B Lomariopsis boninensis (TNS 790636).