Ferns of Thailand, Laos and Cambodia

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Family

Polypodiaceae

Nomenclature

Lepisorus longifolius (Blume) Holttum, Rev. Fl. Malaya ed. 1, 2: 151, f. 65. 1955 [‘1954’]; Tagawa & K.Iwats., Fl. Thailand 3: 508, f. 51.5. 1989; Hovenkamp, Fl. Males., Ser. II, Ferns and Fern Allies 3: 78. 1998; Boonkerd & Pollawatn, Pterid. Thailand: 274. 2000. – Pleopeltis longifolia Blume, Enum. Pl. Javae addend. 1828; Bedd., Handb. Ferns Brit. India: 349, f. 196. 1883; Tagawa & K.Iwats., SouthE. Asian Stud. 5: 50. 1967; Tagawa & K.Iwats., Acta Phytotax. Geobot. 23: 52. 1968. – Paragramma longifolia (Blume) T.Moore, Index Fil.: xxxii. 1857; Copel., Gen. Fil.: 190. 1947. – Type: Blume s.n (L), Java.

Polypodium revolutum C.Chr., Ind. Fil. 331, 559. 1906; Bonap., Notes Ptérid. 14: 65. 1923. – Pleopeltis revoluta (C.Chr.) Alderw., Bull. Dép. Agric. Indes Néerl. 23: 5. 1909. – Phymatodes revoluta (C.Chr.) C.Chr. & Tardieu, Notul. Syst. 8: 190. 1939; Tardieu & C.Chr., Fl. Indo-Chine 7(2): 468. 1941.

Description

Epiphytic or lithophytic, rarely terrestrial. Rhizome short creeping, 3–4.5 mm diam., bearing closely spaced fronds, glaucous on surface, scaly; scales oblong-ovate with attenuate apex, 2.5–4 by 0.8 mm, light brown, more or less clathrate, sharply toothed at margin. Stipes indistinct or up to 8 cm long, scaly at base, stramineous, winged nearly to the very base. Laminae linear, 25–50(–70) by 1–3.5(–4.5) cm, broadest at usually about 1/4 way from base, gradually narrowing towards both ends, attenuate towards but round or pointed at the very apex, attenuate towards base; midrib raised on both surfaces; coriaceous, veins invisible on both surfaces, copiously anastomosing with included free veinlets. Sori usually oblong, occassionally round, up to 10 by 2 mm, in a single row 1-2 mm from the margin, more or less immersed in cavities and densely covered with scale-like paraphyses when young. Spores monolete .

Distribution in Thailand

NORTHERN: Chiang Mai; PENINSULAR: Chumphon, Ranong, Phangnga, Nakhon Si Thammarat, Satun, Yala, Narathiwat.

Distribution in Cambodia

Kampot.

Wider Distribution

NE India, Burma, W Malesia to the Philippines and Java; there are possible records from New Guinea and Polynesia.

Ecology

On tree trunks in dense evergreen forests or along streams in light shade, rather common at low altitudes in Peninsular.

Proposed IUCN Conservation Assessment

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

Voucher specimens - Thailand

Geesink & Santisuk 5392, Nakhon Si Thammarat, Thong Song (P).

	Ferns of Thailand, Laos and Cambodia
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Lepisorus longifolius (Blume) Holttum Warning: count(): Parameter must be an array or an object that implements Countable in C:\Data\serverroots\htdocs\ThaiFerns\factsheets\functions.php on line 17 Family Polypodiaceae Nomenclature Lepisorus longifolius (Blume) Holttum, Rev. Fl. Malaya ed. 1, 2: 151, f. 65. 1955 [‘1954’]; Tagawa & K.Iwats., Fl. Thailand 3: 508, f. 51.5. 1989; Hovenkamp, Fl. Males., Ser. II, Ferns and Fern Allies 3: 78. 1998; Boonkerd & Pollawatn, Pterid. Thailand: 274. 2000. – Pleopeltis longifolia Blume, Enum. Pl. Javae addend. 1828; Bedd., Handb. Ferns Brit. India: 349, f. 196. 1883; Tagawa & K.Iwats., SouthE. Asian Stud. 5: 50. 1967; Tagawa & K.Iwats., Acta Phytotax. Geobot. 23: 52. 1968. – Paragramma longifolia (Blume) T.Moore, Index Fil.: xxxii. 1857; Copel., Gen. Fil.: 190. 1947. – Type: Blume s.n (L), Java. Polypodium revolutum C.Chr., Ind. Fil. 331, 559. 1906; Bonap., Notes Ptérid. 14: 65. 1923. – Pleopeltis revoluta (C.Chr.) Alderw., Bull. Dép. Agric. Indes Néerl. 23: 5. 1909. – Phymatodes revoluta (C.Chr.) C.Chr. & Tardieu, Notul. Syst. 8: 190. 1939; Tardieu & C.Chr., Fl. Indo-Chine 7(2): 468. 1941. Description Epiphytic or lithophytic, rarely terrestrial. Rhizome short creeping, 3–4.5 mm diam., bearing closely spaced fronds, glaucous on surface, scaly; scales oblong-ovate with attenuate apex, 2.5–4 by 0.8 mm, light brown, more or less clathrate, sharply toothed at margin. Stipes indistinct or up to 8 cm long, scaly at base, stramineous, winged nearly to the very base. Laminae linear, 25–50(–70) by 1–3.5(–4.5) cm, broadest at usually about 1/4 way from base, gradually narrowing towards both ends, attenuate towards but round or pointed at the very apex, attenuate towards base; midrib raised on both surfaces; coriaceous, veins invisible on both surfaces, copiously anastomosing with included free veinlets. Sori usually oblong, occassionally round, up to 10 by 2 mm, in a single row 1-2 mm from the margin, more or less immersed in cavities and densely covered with scale-like paraphyses when young. Spores monolete . Distribution in Thailand NORTHERN: Chiang Mai; PENINSULAR: Chumphon, Ranong, Phangnga, Nakhon Si Thammarat, Satun, Yala, Narathiwat. Distribution in Cambodia Kampot. Wider Distribution NE India, Burma, W Malesia to the Philippines and Java; there are possible records from New Guinea and Polynesia. Ecology On tree trunks in dense evergreen forests or along streams in light shade, rather common at low altitudes in Peninsular. Proposed IUCN Conservation Assessment Least Concern (LC). This species is widespread and not under any known threat. Voucher specimens - Thailand Geesink & Santisuk 5392, Nakhon Si Thammarat, Thong Song (P). Warning: count(): Parameter must be an array or an object that implements Countable in C:\Data\serverroots\htdocs\ThaiFerns\factsheets\functions.php on line 17
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Lepisorus longifolius (Blume) Holttum