Ferns of Thailand, Laos and Cambodia

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Family

Tectariaceae

Nomenclature

Tectaria siifolia (Willd.) Copel., Philipp. J. Sci., Sect. C, Botany 2: 414. 1907; Holttum, Fl. Males., Ser. II, Pterid. 2: 84. 1991; Boonkerd & Pollawatn, Pterid. Thailand: 216. 2000. – Polypodium siifolium Willd., Sp. Pl. ed. 4, 5: 196. 1810. – Aspidium siifolium (Willd.) Mett., Ann.Mus. Bot. Lugd.-Bat. 1: 237. 1864. – Type: Ventenat s.n., Java (B, herb Willd. 19689).

Aspidium ternifolium Alderw., Bull. Jard. Bot. Buitenzorg, Ser. 2, 11: 3. 1913. – Tectaria ternifolia (Alderw.) C.Chr., Index Filic. Suppl. 3: 185. 1934; Holttum, Rev. Fl. Malaya ed. 1, 2: 516, f. 303. 1955 [‘1954’] ; Tagawa & K.Iwats., Fl. Thailand 3: 378. 1988; Boonkerd & Pollawatn, Pterid. Thailand: 217. 2000.

Description

Rhizome short, ascending, scaly; scales narrow, linear-subtriangular, about 5 by 0.8 mm, entire or fimbriate when young, brown or darker. Stipes up to 30 cm long, stramineous or pale castaneous, pubescent throughout. Laminae trifoliate or quinquefoliate, the fertile soriferous ones more or less contracted; lateral leaflets very shortly stalked with gemmae at junction to rachis, ovate-oblong with rounded base and caudate-acuminate apex, about 12 by 5 cm, subentire or irregularly lobed; terminal leaflets simple or trilobed, cuneate to very broadly cuneate at base, subentire to shallowly lobed, up to 14 by 6 cm; rachis and raised underside of costa with short articulated hairs; lateral main veins raised below, hairy, veins forming copious areoles (venatio drynariae), with simple or branched included veinlets, visible on both surfaces, glabrous; texture softly papyraceous to herbaceous, glabrous on surfaces. Sori round to elongate, large, up to 1.5 mm diam., dorsal on anastomosing veins, two rows between adjacent main veins, sometimes confluent at maturity; indusia not seen.

Distribution in Thailand

PENINSULAR: Trang, Satun.

Wider Distribution

Throughout Malesia.

Ecology

On clayey ground at peak of hills near sea-level.

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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Tectaria siifolia (Willd.) Copel. 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 Tectariaceae Nomenclature Tectaria siifolia (Willd.) Copel., Philipp. J. Sci., Sect. C, Botany 2: 414. 1907; Holttum, Fl. Males., Ser. II, Pterid. 2: 84. 1991; Boonkerd & Pollawatn, Pterid. Thailand: 216. 2000. – Polypodium siifolium Willd., Sp. Pl. ed. 4, 5: 196. 1810. – Aspidium siifolium (Willd.) Mett., Ann.Mus. Bot. Lugd.-Bat. 1: 237. 1864. – Type: Ventenat s.n., Java (B, herb Willd. 19689). Aspidium ternifolium Alderw., Bull. Jard. Bot. Buitenzorg, Ser. 2, 11: 3. 1913. – Tectaria ternifolia (Alderw.) C.Chr., Index Filic. Suppl. 3: 185. 1934; Holttum, Rev. Fl. Malaya ed. 1, 2: 516, f. 303. 1955 [‘1954’] ; Tagawa & K.Iwats., Fl. Thailand 3: 378. 1988; Boonkerd & Pollawatn, Pterid. Thailand: 217. 2000. Description Rhizome short, ascending, scaly; scales narrow, linear-subtriangular, about 5 by 0.8 mm, entire or fimbriate when young, brown or darker. Stipes up to 30 cm long, stramineous or pale castaneous, pubescent throughout. Laminae trifoliate or quinquefoliate, the fertile soriferous ones more or less contracted; lateral leaflets very shortly stalked with gemmae at junction to rachis, ovate-oblong with rounded base and caudate-acuminate apex, about 12 by 5 cm, subentire or irregularly lobed; terminal leaflets simple or trilobed, cuneate to very broadly cuneate at base, subentire to shallowly lobed, up to 14 by 6 cm; rachis and raised underside of costa with short articulated hairs; lateral main veins raised below, hairy, veins forming copious areoles (venatio drynariae), with simple or branched included veinlets, visible on both surfaces, glabrous; texture softly papyraceous to herbaceous, glabrous on surfaces. Sori round to elongate, large, up to 1.5 mm diam., dorsal on anastomosing veins, two rows between adjacent main veins, sometimes confluent at maturity; indusia not seen. Distribution in Thailand PENINSULAR: Trang, Satun. Wider Distribution Throughout Malesia. Ecology On clayey ground at peak of hills near sea-level. 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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