Tectaria semipinnata (Roxb.) C.V.Morton

Family

Tectariaceae

Nomenclature

Tectaria semipinnata (Roxb.) C.V.Morton, Contr. U.S. Natl. herb. 38: 286. 1974; Holttum, Fl. Males., Ser. II, Pterid. 2: 67. 1991; Boonkerd & Pollawatn, Pterid. Thailand: 216. 2000. – Acrostichum semipinnatum Roxb., Calcutta J. Nat. Hist. 4: 480. 1844.

Gymnogramme maingayi Baker, Syn. Fil.: 517. 1874. – Selliguea maingayi (Baker) Bedd., Suppl. Ferns Brit. Ind.: 24. 1876. – Polypodium maingayi (Baker) Diels in Engl. & Prantl, Nat. Pflanzenfam. 1, 4: 318. 1899. – Hemionitis maingayi (Baker) Ridl., J. Malayan Branch Roy. Asiat. Soc. 4: 106. 1926. – Aspidium maingayi (Baker) Holttum, Gard. Bull. Starits Settlem. 5: 207. 1934. – Tectaria maingayi (Baker) C.Chr., Index Filic. Suppl. 3: 182. 1934; Holttum, Rev. Fl. Malaya ed. 1, 2: 513, f. 302. 1955 [‘1954’]; Holttum, Dansk Bot. Ark. 20: 31. 1961; Tagawa & K.Iwats., SouthE. Asian Stud. 3(3): 86. 1965; Tagawa & K.Iwats., SouthE. Asian Stud. 5: 99. 1967; Tagawa & K.Iwats., Acta Phytotax. Geobot. 23: 55. 1968; Tagawa & K.Iwats., Fl. Thailand 3: 382. 1988.

Description

Rhizome short, erect, scaly; scales gradually narrowing from base towards apex, stiff, with ragged paler edges, dark brown, bearing long coarse hairs, up to 10 by 1.7 mm. Stipes 15–60 cm long, dark stramineous to brown, densely scaly at base, glabrescent upwards. Laminae simple to imparipinnate with 1–3 pairs of free pinnae, up to 45 by 35 cm, the fertile lamina narrower; rachis like the upper part of stipe, glabrous; lateral pinnae oblong-ovate, gradually narrowing towards caudate apex, cuneate at sessile base, entire, up to 30 by 9 cm, rarely bearing basal basiscopic lobes, those of fertile ones smaller, usually up to 12 by 3.5 cm, the terminal pinna oblong, up to 30 by 12 cm; softly papyraceous, green, glabrous, fertile pinnae minutely pubescent on veins and/or lamina beneath or not; costa and main veins raised beneath, cross-veins less distinct, veins anastomosing to form main areoles and smaller ones with included veinlets. Sori exindusiate, round or more or less elongate along reticulate veins, confluent, sometimes covering the whole undersurface of pinnae .

Distribution in Thailand

PENINSULAR: Surat Thani, Phangnga, Phuket, Nakhon Si Thammarat, Trang, Yala, Narathiwat.

Wider Distribution

W Malesia.

Ecology

On mountain slopes in dense evergreen forests at low and medium altitudes.

Proposed IUCN Conservation Assessment

Least Concern (LC). This species is widespread and not under any known threat.

Voucher specimens - Thailand

Middleton et al. 4380, Nakhon Si Thammarat, Khao Luang National Park. Karome Waterfall (E).

Whole plant

Whole plant

Old sori

Old sori

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