Ferns of Thailand, Laos and Cambodia

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Family

Lindsaeaceae

Nomenclature

Lindsaea oblanceolata Alderw., Bull. Jard. Bot. Buitenzorg, Ser. 2, 23: 15. 1916; Tagawa & K.Iwats., Acta Phytotax. Geobot. 23: 54. 1968; Kramer, Fl. Males., Ser. II, Pterid. 1: 236. 1971; Kramer, Gard. Bull. Singapore 26: 46. 1972; Tagawa & K.Iwats., Fl. Thailand 3: 144, f. 10.4. 1985; Boonkerd & Pollawatn, Pterid. Thailand: 93. 2000.

Lindsaea pectinata auct. non Blume: Tardieu & C.Chr., Fl. Indo-Chine 7(2): 124. 1939, p.p.; Holttum, Rev. Fl. Malaya ed. 1, 2: 324. 1955 [‘1954’]; Tagawa & K.Iwats., SouthE. Asian Stud. 5: 93. 1967.

Description

Rhizome long creeping or climbing, 1–2 mm diam., bearing stipes 1–5 cm apart, shining dark brown, scaly throughout; scales narrowly subtriangular, up to 3 by 0.5 mm, entire, brown, Stipe up to 6 cm long, castaneous to base, stramineous and quadrangular in section upwards. Laminae simply pinnate, linear or linear-lanceolate, up to 45 by 3.5 cm, gradually narrowing towards both apex and base; pinnae sessile, up to 50 or more pairs; middle ones larger, oblong or oblong-subdeltoid, up to 18 by 8 mm; lower edge straight or curved, patent or ascending, inner edge close to rachis, forming with lower edge nearly right angles at base, moderately acute to rounded at apex, moderately rounded at upper edge, serrate in sterile ones, serration less than 1 mm in depth, thin, herbaceous, green, but darker in dried specimens; veins distinct on both surfaces, all free except those joined by sori. Sori continuous along upper edge, or sometimes interrupted near rachis, placed a little inside the margin; indusia thin, not reaching the very margin of pinnae .

Distribution in Thailand

PENINSULAR: Surat Thani, Nakhon Si Thammarat, Trang, Yala.

Wider Distribution

Vietnam and throughout Malesia.

Ecology

Terrestrial on humus-rich floor of forest, on rotten wood, or on mossy tree trunks in dense evergreen forests at 1000–1500 m alt.

Similar species

Lindsaea repens (Bory) Thwaites var. pectinata (Blume) Mett. ex Kuhn

Proposed IUCN Conservation Assessment

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

	Ferns of Thailand, Laos and Cambodia
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Lindsaea oblanceolata Alderw. 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 Lindsaeaceae Nomenclature Lindsaea oblanceolata Alderw., Bull. Jard. Bot. Buitenzorg, Ser. 2, 23: 15. 1916; Tagawa & K.Iwats., Acta Phytotax. Geobot. 23: 54. 1968; Kramer, Fl. Males., Ser. II, Pterid. 1: 236. 1971; Kramer, Gard. Bull. Singapore 26: 46. 1972; Tagawa & K.Iwats., Fl. Thailand 3: 144, f. 10.4. 1985; Boonkerd & Pollawatn, Pterid. Thailand: 93. 2000. Lindsaea pectinata auct. non Blume: Tardieu & C.Chr., Fl. Indo-Chine 7(2): 124. 1939, p.p.; Holttum, Rev. Fl. Malaya ed. 1, 2: 324. 1955 [‘1954’]; Tagawa & K.Iwats., SouthE. Asian Stud. 5: 93. 1967. Description Rhizome long creeping or climbing, 1–2 mm diam., bearing stipes 1–5 cm apart, shining dark brown, scaly throughout; scales narrowly subtriangular, up to 3 by 0.5 mm, entire, brown, Stipe up to 6 cm long, castaneous to base, stramineous and quadrangular in section upwards. Laminae simply pinnate, linear or linear-lanceolate, up to 45 by 3.5 cm, gradually narrowing towards both apex and base; pinnae sessile, up to 50 or more pairs; middle ones larger, oblong or oblong-subdeltoid, up to 18 by 8 mm; lower edge straight or curved, patent or ascending, inner edge close to rachis, forming with lower edge nearly right angles at base, moderately acute to rounded at apex, moderately rounded at upper edge, serrate in sterile ones, serration less than 1 mm in depth, thin, herbaceous, green, but darker in dried specimens; veins distinct on both surfaces, all free except those joined by sori. Sori continuous along upper edge, or sometimes interrupted near rachis, placed a little inside the margin; indusia thin, not reaching the very margin of pinnae . Distribution in Thailand PENINSULAR: Surat Thani, Nakhon Si Thammarat, Trang, Yala. Wider Distribution Vietnam and throughout Malesia. Ecology Terrestrial on humus-rich floor of forest, on rotten wood, or on mossy tree trunks in dense evergreen forests at 1000–1500 m alt. Similar species Lindsaea repens (Bory) Thwaites var. pectinata (Blume) Mett. ex Kuhn Proposed IUCN Conservation Assessment Least Concern (LC). This species is widespread and not under any known threat. 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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Lindsaea oblanceolata Alderw.