Tectaria griffithii (Baker) C.Chr.

Family

Tectariaceae

Nomenclature

Tectaria griffithii (Baker) C.Chr., Index Filic. Suppl. 3: 180. 1934; Tardieu & C.Chr., Fl. Indo-Chine 7(2): 411. 1941; Holttum, Dansk Bot. Ark. 23: 240. 1965; Holttum, Rev. Fl. Malaya, ed. 2, 2: 636. 1968; Tagawa & K.Iwats., SouthE. Asian Stud. 5: 97. 1967; Tagawa & K.Iwats., Acta Phytotax. Geobot. 23: 55. 1968; Tagawa & K.Iwats., Fl. Thailand 3: 370. 1988; Holttum, Fl. Males., Ser. II, Pterid. 2: 54. 1991; Boonkerd & Pollawatn, Pterid. Thailand: 213. 2000. – Nephrodium griffithii Baker in Hook. & Baker, Syn. Fil.: 300. 1867. – Type: Griffith s.n., Burma (K).

Nephrodium multicaudatum C.B.Clarke, Trans. Linn. Soc. II. 1: 540, t. 77. 1880. – Tectaria multicaudata (C.B.Clarke) Ching, Sinensia 2: 20. 1931; Holttum, Rev. Fl. Malaya ed. 1, 2: 507, f. 299. 1955 [‘1954’]. – Aspidium multicaudatum (C.B.Clarke) Bedd., Handb. Ferns Brit. India: 222. 1883.

Description

Rhizome short, erect, scaly; scales linear-subtriangular, up to 20 by 3 mm, entire, dark brown. Stipes dark brown to castaneous, up to 70 cm long, scaly throughout but scales gradually sparse upwards, hairy at least on adaxial surface. Laminae oblong-subdeltoid or pentagonal, up to 70 by 40 cm; lateral pinnae 1–4 free pairs, basal pinna the largest, with long stalk, asymmetrically subdeltoid, acute at apex, up to 30 by 25 cm, 1 or 2 basal basiscopic pinnules much larger, free with short stalks or sessile, oblong-lanceolate, caudate-acuminate, deeply lobed, up to 20 by 6 cm, 1 or 2 basal acroscopic pinnules free; middle pinnae smaller, with 0–2 free pinnules; apical pinna oblong-subdeltoid, acute at apex, broadly cuneate and a little decurrent at base, deeply lobed to pinnatifid; herbaceous, dark green, glabrous on both surfaces; rachis, costae and costules coarsely hairy above, sparsely scaly beneath; veins anastomosing to form copious areoles. Sori round, terminal on short free included veinlets, indusiate, in a single row at each side of midrib, medial or a little costular, more or less immersed and raised on upper surface; indusia large, up to 2 mm diam., glabrous, persistent .

Distribution in Thailand

NORTHERN: Lampang; NORTH-EASTERN: Loei; SOUTH-WESTERN: Kanchanaburi, Phetchaburi; SOUTH-EASTERN: Chanthaburi, Trat; PENINSULAR: Ranong, Surat Thani, Phangnga, Krabi, Nakhon Si Thammarat, Yala.

Distribution in Laos

[Peunongs]

Wider Distribution

N India, Burma, SW China, Indochina, W Malesia to the Philippines.

Ecology

On rocky mountain slopes in dense evergreen forests at low altitudes below 600 m alt.

Proposed IUCN Conservation Assessment

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

Voucher specimens - Thailand

Middleton et al. 4759, Kanchanaburi, Khao Laem National Park (E); Middleton et al. 4642, Trat, Khlong Kaew National Park (E); Middleton et al. 4349 & 5548, Surat Thani, Khlong Phanom National Park (E).

Habit

Habit

Habit

Habit

Rhizome

Rhizome

Transverse section through stipe

Transverse section through stipe

Scales on stipe

Scales on stipe

Fertile and sterile fronds

Fertile and sterile fronds

Sterile frond

Sterile frond

Fertile frond

Fertile frond

Basal basiscopic pinnules

Basal basiscopic pinnules

Venation

Venation

Venation

Venation

Hairs at sinus on sterile frond

Hairs at sinus on sterile frond

Upper surface of fertile frond

Upper surface of fertile frond

Upper surface of fertile frond

Upper surface of fertile frond

Upper surface of fertile frond

Upper surface of fertile frond

Lower surface of lamina with sori

Lower surface of lamina with sori

Very young sori

Very young sori

Young sori

Young sori

Young sori

Young sori

Older sori

Older sori

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