Blechnum finlaysonianum Wall. ex Hook. & Grev.

Family

Blechnaceae

Nomenclature

Blechnum finlaysonianum Wall. ex Hook. & Grev., Icon. Filic.: t. 225. 1831; Bedd., Handb. Ferns Brit. India: 132. 1883; Holttum, Rev. Fl. Malaya ed. 1, 2: 445, f. 261. 1955 [‘1954’]; Tagawa & K.Iwats., Acta Phytotax. Geobot. 23: 55. 1968; Tagawa & K.Iwats., Fl. Thailand 3: 346. 1988; Tagawa & K.Iwats., Fl. Thailand 3: 298, f. 24.1 & 24.2. 1988; Boonkerd & Pollawatn, Pterid. Thailand: 180. 2000. – Type: Wallich Cat. No. 2172, "Herb. Finlayson", Penang? (E, fragment).

Description

Terrestrial. Rhizome thick, ascending or suberect, densely covered with scales; scales c. 2 cm long, up to 2 mm broad, dark brown. Stipes stout, stramineous, or sometimes purplish when young, up to 70 cm long, bearing small auricles (reduced pinnae) throughout, scales at base of stipe stiff, shining dark-brown, up to 2.3 cm by 2.5 mm. Laminae to 100 cm or more long; lateral pinnae many in number, lowest pinnae sessile, narrowly cuneate at base, upper pinnae adnate and decurrent at the base, up to about 40 by 4 cm, rather suddenly narrowed to a short acuminate apex, papyraceous; veins simple or forked usually near costa, distinct on both surfaces, very close, up to 1 mm apart; coriaceous, green, glabrous throughout. Sori narrow, long-continuous along costa; indusia narrow, usually broken before maturity.

Distribution in Thailand

PENINSULAR: Yala, Narathiwat.

Wider Distribution

Throughout Malesia, from Peninsular Malaysia to New Guinea.

Ecology

In shade along large streams at about 440 m alt.

Proposed IUCN Conservation Assessment

Least Concern (LC). This species is widespread in other parts of its range and not under any known threats.

HAbit

HAbit

Habit

Habit

Pinnae

Pinnae

Pinnae with sori

Pinnae with sori

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