Basionym:— Dryopteris austrosinensis Christ (1907: 145).

Type:— CHINA. Guizhou: Luodian (formerly Lo-fou), Nov 1905, Cavalerie 2637 (lectotype E-00417653!, isolectotypes BM-001048645!, P-00644787 [photo!]; designated here!).

Note: —When Christ (1907: 145) originally described this species, he cited two collections, i.e. Cavalerie 2637 from “Ouest Lo-fou” and “Esq. s.i.l. ” from the same location. I have traced three sheets of Cavalerie 2637, each in a different herbarium (BM, E, and P), and two sheets of Esquirol’s collection (nos 759 & 3733) with “Type specimen” label at E. The sheet of Cavalerie 2637 at E (E-00417653) is relatively better than others and is selected here as the lectotype of T. austrosinensis.

Tectaria austrosinensis is distinct in Tectaria by having linear-lanceolate basal pinnae, throughout scaly stipe, fully free venation (or occasionally with one basal veinlet connected), and exindusiate sori. Apart from these characters, the size of plant is also very helpful to distinguish most plants of T. austrosinensis from those of T. fuscipes. Tectaria austrosinensis is generally much larger than T. fuscipes, with the lateral pinnae mostly being 20–23 cm long in the former (e.g., Fig. 1) while 9–15 cm in the latter (Fig. 2). The main differences between T. fuscipes and T. austrosinensis in the size of pinnae and the shape of basal pinnae has also been pointed out by Christensen (1931: 290) when he transferred Aspidium fuscipes Wallich ex Beddome (1876: 15) to T. fuscipes.

Additional specimens examined: — CHINA. Guizhou: without special locality, Cavalerie s.n. (P-01439960), Esquirol 2676 (PE). Yunnan: Maguan, Dong 3617 (IBSC); Hekou, Dong 3602 (IBSC). Guangxi: Huanjiang, Wei 2069 (IBK); Longzhou, Morse 70 (PE), Guangxi Exped. 1206 (PE), Su & Li 182 (IBK).

VIETNAM. Bac Kan: Chao Don, Averyanov et al. HAL4718 (HNU); Na Ri, Averyanov et al. HAL5396 (HNU). Dien Bien: Tua Chua, Averyanov et al. CPC979 (HNU). Son La: Yen Chau, Harder et al. 7248 (HNU).