Tectaria chinensis

Dong, Shi-Yong, Tan, Shi-Shi, Pham, Van The & Phan, Ke Loc, 2018, The true Tectaria chinensis (Tectariaceae): morphology, distribution, and allied species, Phytotaxa 376 (1), pp. 60-67 : 65

Key to Tectaria chinensis and those with similar pattern in lamina shape (basal pinnae prolonged at basal basiscopic side) and venation (partly free, with costal areoles) in China and Indochina

1. Sori dorsal on anastomosing veins, exindusiate.................................................................................................................................2

- Sori terminal on free veinlets either included in or outside areoles, indusiate...................................................................................4

2. Rhizome long-creeping; stipe and rachis slender, stramineous; lamina thin herbaceous, much hairy abaxially................................. ........................................................................................................................... T. tenerifrons ( Hooker 1864: 104) Ching (1931: 34)

- Erect caudex present; stipe and rachis dark brown or castaneous; lamina thick herbaceous, abaxially hairless...............................3

3. Caudex 15–40 cm tall; stipe and rachis dark brown, with quite a few scales ...................................................................................... .......................................................................................... T. chinensis (Ching & Chu H. Wang 1981: 124) Christenhusz (2010: 58)

- Caudex less than 5 cm tall; stipe and rachis castaneous, without scales beyond base of stipe ............................................................ ...................................................................................................................... T. chattagramica ( Clarke 1880: 548) Ching (1931: 35)

4. Veins forming one row of areoles along either side of costae, additional areoles few; lamina thin herbaceous ................................. ........................................................................................................................... T. devexa ( Kunze 1848: 259) Copeland (1907: 415)

- Anastomosis much more; lamina thick herbaceous...........................................................................................................................5

5. Stipe scaly throughout, scales ovate, more or less appressed.......................... T. multicaudata ( Clarke 1880: 540) Ching (1931: 20)

- Scales restricted on base of stipe, spreading......................................................................................................................................6

6. Stipe scales lanceolate, not very firm; costae and costules obviously hairy on abaxial surface .......................................................... ........................................................................................................... T. coadunata (J. Smith 1842: 184) C. Christensen (1931: 331)

- Stipe scales narrowly lanceolate or acicular, firm and straight; costae and costules abaxially glabrous or nearly so ......................... ............................................................................................................................. T. remotipinna Ching & Chu H. Wang (1981: 129)