Family

Thelypteridaceae

Nomenclature

Cyclosorus ciliatus (Wall. ex Benth.) Panigrahi, Res. J. Pl. Environ. 9: 66. 1993. – Aspidium ciliatum Wall. ex Benth., Fl. Hongk.: 455. 1861. – Lastrea calcarata var. ciliata (Wall. ex Benth.) Bedd., Handb. Ferns Brit. India: 235, f. 121. 1883. – Thelypteris ciliata (Wall. ex Benth.) Ching, Bull. Fan Mem. Inst. Biol. 6: 289. 1936; Tardieu & C.Chr., Fl. Indo-Chine 7(2): 362. 1941; Holttum, Rev. Fl. Malaya ed. 1, 2:250, f. 142. 1955 [‘1954’]; Holttum, Dansk Bot. Ark. 20: 22. 1961; Tagawa & K.Iwats., SouthE. Asian Stud. 3(3): 78. 1965; Tagawa & K.Iwats., SouthE. Asian Stud. 5: 68. 1967; Tagawa & K.Iwats., Fl. Thailand 3: 401, f. 39. 6–9. 1988; Newman et al., Checkl. Vasc. Pl. Lao PDR: 33. 2007. – Trigonospora ciliata (Wall. ex Benth.) Holttum, Blumea 19: 29. 1971; Reinwardtia 8: 507. 1974; Holttum, Fl. Males., Ser. II, Pterid. 1: 375, f. 5c–e. 1982 [‘1981’]; Boonkerd & Pollawatn, Pterid. Thailand: 231. 2000. – Type: "Bowman" (Bowring), Hong Kong (K, lectotype (Holttum 1974)) .

Description

Rhizome short, erect; scales up to 3 by 1.5 mm, membranous, appressed, brown, hairy. Stipes stramineous to greyish, hairy throughout, up to 30 cm long. Soriferous fronds usually taller and larger than sterile ones, oblong-lanceolate, acute at apex, 13–35 by 6–13 cm; lowest pinnae shortened, deflexed, pinnae of lower 1/3 largest, patent, subsessile, linear-lanceolate, caudately acuminate at apex, broadly cuneate at base, often auricled; rachis and costa densely hirsute; segments falcate, oblique, rounded at apex, subentire, hairy at margin; chartaceous or thicker, deep green; veins pinnate, veinlets simple, basal anterior ones running to sinus, hairy. Sori subcostular, often confluent at maturity; indusia firm, persistent, hairy .

Distribution in Thailand

NORTHERN: Chiang Mai, Chiang Rai, Phrae, Tak, Phitsanulok; NORTH-EASTERN: Phetchabun, Loei; SOUTH-EASTERN: Chanthaburi; PENINSULAR: Nakhon Si Thammarat, Trang, Yala.

Distribution in Laos

Luang Phrabang.

Wider Distribution

Nepal to W Malesia, north to Hong Kong.

Ecology

Usually on muddy stream-beds in dense forests at 500–1700 m alt.

Proposed IUCN Conservation Assessment

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

Voucher specimens - Thailand

Mitsuta et al. T-50256, Chiang Mai (QBG); Middleton et al. 4927, Chiang Mai, Doi Inthanon National Park (E); Middleton et al. 4652, Chanthaburi, Namtok Phlio National Park (E).