Stegnogramma wilfordii (Hook.) Seriz.

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 : 140

Stegnogramma wilfordii (Hook.) Seriz. ( Fig. 13 )

Type:— TAIWAN. Keelung City, June 1860, Wilford 503 (holotype: K-000951546, image seen).

Voucher specimens examined:— VIETNAM. Lam Dong Province, Lac Duong District, Da Chais Commune, Giang Ly, Tieu khu 86, ca. 1200 m, 12.230° N, 108.676° E, 10 February 2020, C.- W. Chen Wade6010 ( SGN!, TAIF!).

Additional specimens examined:— CHINA. Guangxi Zhuang Autonomous Region, Wuming County, Mt. Daming, 31 March 2013, C.- W. Chen Wade2352 ( TAIF!). JAPAN. Kagoshima, Yakushima Island, Hanaage River, 30 September 2015, C.- W. Chen Wade4507 (TAIF-499519!, TAIF-499520!). TAIWAN. Ilan County, Chiuliao Stream, P.- F. Lu 18971 (TAIF-335708!).

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

Ecology:—This species grows on slope along streams under broad-leaved evergreen forest at altitudes of ca. 1100 m.

Note:—Morphologically, S. wilfordii is most similar to S. griffithii (T.Moore) Iwatsuki (1963: 117) but can be distinguished from that species by having the combination of following characters: lamina pinnatifid or sometimes with one pair of lateral free-pinna, lamina densely covered with acicular hairs abaxially, terminal pinnae lobbed, and venation reticulate ( Lin et al. 2013; Chen et al. 2019). Although S. wilfordii was previously recorded for Vietnam in Flora of China ( Lin et al. 2013) and then followed by Hassler & Schmitt (2019 onwards), no specimen was cited there. The only voucher of S. wilfordii from Vietnam we could locate was a wrongly identified specimen collected from northern Vietnam in TAIF (Barcode 378058). After examination, we confirmed that specimen is an immature and sterile plant of S. griffithii . As a result, we think the previous northern Vietnam record is merely an error and our new collection from Lang Biang is the first confirmed record of S. wilfordii in Vietnam instead.

Figures

FIGURE 13. Stegnogramma wilfordii—A. Habit. B. Scales. C. Upper stipe. D. Venation. E. Sori. C.-W. Chen Wade6010.