Crepidomanes makinoi (C.Chr.) Copel.

Chen, Cheng-Wei, Hsu, Tian-Chuan, Chao, Yi-Shan, Lu, Ping-Fong, Li, Chia-Wei, Tram, Nguyen Khanh Trinh, Nguyen, Ich Le Phuoc Thanh, Dang, Minh Tri, Luu, Hong Truong & Parris, Barbara, 2020, A newly recorded genus and twelve newly recorded species of ferns for Vietnam from Lang Biang Plateau, Phytotaxa 443 (2), pp. 121-143 : 126

Crepidomanes makinoi (C.Chr.) Copel. ( Fig. 4 )

Basionym: Trichomanes makinoi C.Chr. (1906: 644) .

Type :— JAPAN. Nanokawa, Makino s.n. (holotype: P-00623409, image seen; isotype: TI) .

Voucher specimens examined:— VIETNAM. Lam Dong Province, Lac Duong District, Da Chais Commune, Bidoup - Nui Ba National Park, Mt. Bidoup , the valley behind the lodge, 23 June 2018, 1800 m, T.- C. Hsu 10713 ( SGN!, TAIF!) ; Lam Dong Province, Lam Ha District, Phu Son Commune, Nam Ban Protection Forest , the valley near Phu Son Lam restaurant, 1261 m, 11.919° N, 108.172° E, 27 November 2018, P.- F. Lu 31596 ( SGN!, TAIF!, SING!, TNS!) .

Additional specimens examined:— CHINA. Guangxi Zhuang Autonomous Region, Lingchuan County, Dayeshenjing Ecological Tourist Science Area , 300–500 m, T.- C. Hsu 6474 ( IBK!, TAIF!) ; Sichuan Province, Emeishan City, Mt. Emei , 1100–1300 m, 7 August 2011, T.- C. Hsu 4450 ( TAIF!) ; Sichuan Province, Dujiangyan City, Qingchenghoushan , 1200–1600 m, 11 August 2011, T.- C. Hsu 4458 (TAIF-469753!) ; Sichuan Province, Chengdu City, Mt. Xilingxue , 1300–2100 m, 12 August 2011, T.- C. Hsu 4478 ( TAIF!) . TAIWAN. Chiayi County, Yushankou , 2300–2500 m, 29 June 2015, T.- C. Hsu 7911 (TAIF-474918!) ; Chiayi County, Fenjei Ancient Trail , 1400–1600 m, 24 July 2016, P.- F. Lu 29667 (TAIF-496170!) .

Distribution:—Previously only known from China, Japan and Taiwan.

Ecology:—In Vietnam, this species has been found in damp broad-leaved forests. There it grows as an epiphyte on mossy tree trunks near streams.

Note:—This species has sometimes been lumped in Crepidomanes latealatum (Bosch) Copel. (1938: 60) (e.g., Liu et al. 2013; Nwe et al. 2017). Although these two species are genetically close to each other (3 bp. difference in their rbcL genes, Ebihara et al. 2010), however, C. makinoi can be distinguished from C. latealatum by having very short (mostly <1 cm long) stipes, sharply acute ultimate segment apexes, longer and denser striae (short false veinlets) between margins and midribs, and acute involucres. Here we followed TPG (2019) which recognized C. makinoi as a distinct species and treated C. palmifolium (Hayata) De Vol (1968: 108) as its synonym. In addition, we also reported its occurrence in China for the first time (see Additional specimens examined).

Figures

FIGURE 4. Crepidomanes makinoi—A. Habit. B. Fertile fronds. C. Involucres. D. Venation (backlight). T.-C. Hsu 10713.