Tectaria fissa (Kunze) Holttum

Family

Tectariaceae

Nomenclature

Tectaria fissa (Kunze) Holttum, Fl. Males., Ser. II, Pterid. 2: 87. 1991. – Aspidium fissum Kunze, Bot. Zeitung 6: 258. 1848. – Type: Lectotype (selected by Holttum, Flora Malesiana 1991), Zollinger 2369, Java (L accession number 908,302-348 & 349; iso BM).

Leptochilus rumicifolius Ridl., J. Malayan Branch Roy. Asiat. Soc. 4: 116. 1926. – Tectaria rumicifolia (Ridl.) C.Chr., Index Filic. Suppl. 3: 184. 1934; Holttum, Rev. Fl. Malaya.2: 519. 1955 [‘1954’]; Holttum, Dansk Bot. Ark. 23: 241. 1965; Tagawa & K.Iwats., Fl. Thailand 3: 380. 1988; Boonkerd & Pollawatn, Pterid. Thailand: 216. 2000.

Tectaria polymorpha var. cuneifolia Bonap., Notes Ptérid. 14: 50. 1923; Holttum, Rev. Fl. Malaya ed. 1, 2: 518, f. 304. 1955 [‘1954’]; Tagawa & K.Iwats., Acta Phytotax. Geobot. 23: 56. 1968.

Description

Description adapted from Holttum, Fl. Males., Ser. II, Pterid. 2: 87. 1991.
Rhizome short, suberect. Stipes to 70 cm long, castaneous, glabrescent; basal scales to 15 x 2 mm, firm, glossy, twisted distally, fringed when young. Laminae to 100 cm long, 1–5 pairs of pinnae and a pinna-like apex which may be joined to the uppermost pinnae; pinnae to 25 x 6 cm, entire with narrowly cuneate base and caudate-acuminate apex; basal pinnae with stalk 2–3 cm long and a basiscopic lobe which may be more than 20 cm long; main veins 6–10 mm apart along costae and at a broad angle to them, distally upcurved; cross veins rather regular, between them 2 irregular rows of areoles with included veinlets; lower surface of costa and main veins variably minutely hairy, upper surface usually quite glabrous. Sori mostly on veins surrounding areoles, in a row on each side of a cross vein, usually 4–6 in a row in the middle of a large pinna; indusia reniform, firm, persistent .

Distribution in Thailand

PENINSULAR: Yala.

Wider Distribution

Peninsular Malaysia, Sumatra, Java, Borneo.

Ecology

Evergreen forest.

Proposed IUCN Conservation Assessment

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

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