Tectaria vasta (Blume) Copel.

Family

Tectariaceae

Nomenclature

Tectaria vasta (Blume) Copel., Philipp. J. Sci., Sect. C, Botany 2: 411. 1907; Ching, Sinensia 2: 26. 1931; Tardieu & C.Chr., Fl. Indo-Chine 7(2): 416. 1941; Holttum, Rev. Fl. Malaya ed. 1, 2: 512. 1955 [‘1954’]; Tagawa & K.Iwats., SouthE. Asian Stud. 5: 98. 1967; Tagawa & K.Iwats., Fl. Thailand 3: 380. 1988; Holttum, Fl. Males., Ser. II, Pterid. 2: 92. 1991; Boonkerd & Pollawatn, Pterid. Thailand: 164, 218. 2000. – Aspidium vastum Blume, Enum. Pl. Javae.: 142. 1828; Bedd., Handb. Ferns Brit. India: 212, f. 108. 1883. – Type: Blume s.n., Java (L accession number 908,303-155).

Aspidium tricuspe Bedd., Suppl. Ferns Brit. Ind.: 44. 1892.

Description

Rhizome short, suberect, densely covered with scales at apex; scales gradually narrowing from base towards apex, dark brown, stiff, entire, up to 16 by 1.7 mm. Stipes about 20 cm below the basal lobe, broadly winged throughout, wings up to 1 cm broad on both sides, densely scaly at base, glabrescent upwards. Laminae up to 35 by 20 cm, simple or pinnatifid with lateral lobes; lateral lobes oblong with caudate apex, about 12 by 4 cm; simple lamina or terminal lobe oblanceolate to oblong, acute to acuminate at apex, narrowing towards base, up to 35 by 12 cm, almost entire at margin; rachis raised beneath, pubescent; main veins raised on both surfaces, cross-veins distinct, venation reticulate to form main areoles and smaller ones with simple or branched included veinlets. Sori on included veinlets or on anastomosing veins, in two rows between main veins; indusia glabrous , about 1 mm diam.

Distribution in Thailand

PENINSULAR: Surat Thani, Nakhon Si Thammarat, Yala.

Distribution in Laos

Unspecified.

Wider Distribution

N India (?) to Malesia.

Ecology

On mountain slopes in dense evergreen forests at 400–800 m alt.

Similar species

Tectaria fauriei Tagawa

Proposed IUCN Conservation Assessment

Least Concern (LC). Although the exact distribution of this species is uncertain it is widespread and not under any known threat.

Notes

Plants from Northern Thailand referred to Tectaria vasta belong to Tectaria fauriei Tagawa, and those from North India require reexamination.

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