Cyclosorus repandus (Fée) B.K.Nayar & S.Kaur

Family

Thelypteridaceae

Nomenclature

Cyclosorus repandus (Fée) B.K.Nayar & S.Kaur, Companion Beddome's Handb. Ferns Brit. India 66. 1974. – Goniopteris repanda Fée, Mém. Foug., 5. Gen. Filic.: 251. 1852. – Pronephrium repandum (Fée) Holttum, Blumea 20: 108. 1972; Holttum, Fl. Males., Ser. II, Pterid. 1: 533, f. 1n, 16i–j. 1982 [‘1981’]; Boonkerd & Pollawatn, Pterid. Thailand: 227. 2000. – Thelypteris repanda (Fée) Tagawa & K.Iwats., Acta Phytotax. Geobot. 26: 170. 1975; Tagawa & K.Iwats., Fl. Thailand 3: 413. 1988. – Type: Gaudichaud, Penang (FI-W, isotype ).

Phegopteris urophylla Mett., Pheg. Aspid.: 26. 1858, excl. syn. and var. – Polypodium urophyllum (Mett.) Wall. ex Hook., Sp. Fil. 5: 9. 1863. – Nephrodium urophyllum (Mett.) Keys., Polyp. Herb. Bunge: 49. 1873; Bedd., Handb. Ferns Brit. India: 274, f. 140. 1883; Bedd., Suppl. Ferns Brit. Ind.: 72. 1892. – Cyclosorus urophyllus (Mett.) Tardieu ex Tardieu & C.Chr., Not. Syst. 7: 77. 1938; Tardieu & C.Chr., Fl. Indo-Chine 7(2): 391. 1941. – Abacopteris urophylla (Mett.) Ching, Bull. Fan Mem. Inst. Biol. 8: 251. 1938; Holttum, Rev. Fl. Malaya ed. 1, 2: 296, f. 172. 1955 [‘1954’]; Holttum, Dansk Bot. Ark. 20: 24. 1961. – Thelyptenis urophylla (Mett.) K.Iwats. in Tagawa & K.Iwats., SouthE. Asian Stud. 3(3): 81. 1965; Tagawa & K.Iwats., SouthE. Asian Stud. 5: 71. 1967, p.p.; Tagawa & K.Iwats., Acta Phytotax. Geobat. 23: 54. 1968.

Description

Rhizome creeping, about 1 cm diam.; scales narrow, up to 1.5 by 1.2 mm, dark brown to blackish, hairy at margin as well as on dorsal surface. Stipes 37.5–80 cm long, brownish with dark scaly base. Laminae oblong to obovate, 29–70 by 20–50 cm; lateral pinnae 3–6 pairs, basal pinnae sometimes reduced, lower ones shortly stalked, oblong-lanceolate, cuspidate to caudate at apex, rounded to cuneate at base, 15–30 by 2.8–7 cm, irregularly undulate and toothed at margin; terminal pinna longer, broader; papyraceous, firm, yellowish-green to green, verrucose; venation meniscioid. Sori in two medial to subcostular rows, exindusiate; sporangia with several setose hairs.

Distribution in Thailand

SOUTH-WESTERN: Kanchanaburi; PENINSULAR: Chumphon, Surat Thani, Phuket, Nakhon Si Thammarat, Trang, Satun, Yala.

Wider Distribution

Burma (Moulmein), N Vietnam, Peninsular Malaysia, Sumatra, Borneo, W Java, Sulawesi and Philippines.

Ecology

On humus-rich mountain slopes in dense evergreen forests at low to medium altitudes.

Proposed IUCN Conservation Assessment

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

Voucher specimens - Thailand

Smith 3003, Surat Thani, Bandon (K); Middleton et al. 5338, Satun, Thale Ban National Park (E); Smith 2473, Satun (K).

Habit

Habit

Rhizome

Rhizome

Venation

Venation

Lower surface of lamina with mature sori

Lower surface of lamina with mature sori

Lower surface of lamina with young sori

Lower surface of lamina with young sori

Young sori

Young sori

Mature sori

Mature sori

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