Cyclosorus menisciicarpus (Blume) Holttum

Family

Thelypteridaceae

Nomenclature

Cyclosorus menisciicarpus (Blume) Holttum, Dansk Bot. Ark. 25: 39. 1967. – Aspidium menisciicarpon Blume, Enum. Pl. Javae.: 142. 1828. – Dryopteris menisciicarpa (Blume) Rosenst. in  Posthumus, Bull. Jard. Bot. Buitenzorg ser. 3, 13: 93. 1933. – Abacopteris menisciicarpa (Blume) Holttum, Rev. Fl. Malaya ed. 1, 2: 290, f. 168. 1955 [‘1954’]; Holttum, Dansk Bot. Ark. 20: 23. 1961. – Thelypteris menisciicarpa (Blume) K.Iwats., Acta Phytotax. Geobot. 21: 171. 1965; Tagawa & K Iwats., SouthE. Asian Stud. 3(3): 81. 1965; Tagawa & K.Iwats., Fl. Thailand 3: 410. 1988. – Pronephrium menisciicarpon (Blume) Holttum, Blumea 20: 111. 1972; Holttum, Fl. Males., Ser. II, Pterid. 1: 526. 1982 [‘1981’]; Boonkerd & Pollawatn, Pterid. Thailand: 226. 2000. – Type: Blume s.n., W. Java (L, sheet 908, 333-724).

Description

Rhizome short, with closely spaced stipes; scales membranous, brown, triangular, up to 5 by 1.5 mm, hairy. Frond subdimorphic with fertile ones taller. Stipes of fertile frond up to 47 cm long, of sterile ones 5–23 cm long, hairy throughout, scaly near base, rather fleshy in living condition. Laminae ovate, up to 30 by 12 cm in fertile and 12–35 by 8–20 cm in sterile fronds; lateral pinnae 2–5 pairs, sessile, narrowly oblong, caudate-acuminate at apex, broadly cuneate to subtruncate at base, sometimes auricled acroscopically, up to 2.6–7 by 1.2–2.8 cm in fertile 4.1–10 by 1.5–2.5(–5.2) cm in sterile ones, chartaceous, fleshy in living condition, verrucose below, subentire; terminal narrowly triangular to ovate and often twice as long as lateral pinnae; venation meniscioid, obscure. Sori round, usually confluent and appearing crescent-shaped at maturity; indusia brown, persistent, hairy; sporangia setose .

Distribution in Thailand

SOUTH-WESTERN: Prachuap Khiri Khan; PENINSULAR: Surat Thani, Trang, Satun, Yala.

Wider Distribution

Peninsular Malaysia, Sumatra, Java, Borneo, Philippines and New Guinea.

Ecology

On earthy banks or on rocks by streams in evergreen forests at low altitudes.

Proposed IUCN Conservation Assessment

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

Notes

The dimensions in the description are based on Thai material.  Holttum in Flora Malesiana notes that non-Peninsular Malaysian Malesian plants may be larger.

Voucher specimens - Thailand

Sorensen et al. 579, Trang, Khao Chong (K); Middleton et al. 5477, Satun, Than Plew Waterfall (E); Smith 1859, Yala, Bannang Sata (K).

Habit

Habit

Venation

Venation

Fertile frond

Fertile frond

Sori

Sori

Sori on pinna

Sori on pinna

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