Ferns of Thailand, Laos and Cambodia

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Family

Polypodiaceae

Nomenclature

Pyrrosia albicans (Blume) Ching, Bull. Chin. Bot. Soc. 1: 72. 1935; Hovenkamp, Leiden Bot. Ser. 9: 153. 1986; Hovenkamp, Fl. Males., Ser. II, Ferns and Fern Allies 3: 151. 1998. – Nipholobus albicans Blume, Enum. PL. Jav.: 107. 1828. – Cyclophorus albicans (Blume) C.Presl, Epim. Bot.: 131. 1851. – Polypodium albicans (Blume) Mett., Farngatt. 1: 127. 1856. – Type: Reinwardt s.n. (L), Java.

Niphobolus flocciger Blume, Enum. Pl. Javae: 107. 1828. – Pyrrosia floccigera (Blume) Ching, Bull. Chin. Bot. Soc. 1: 71. 1935; Holttum, Rev. Fl. Malaya ed. 1, 2: 147. 1955 [‘1954’]; Holttum, Dansk Bot. Ark. 20:18. 1961; Tagawa & K.Iwats., SouthE. Asian Stud. 5: 49. 1978; Tagawa & K.Iwats., Fl. Thailand 3: 500, f. 50.4 & 50.5. 1989; Boonkerd & Pollawatn, Pterid. Thailand: 285. 2000; Newman et al., Checkl. Vasc. Pl. Lao PDR: 30. 2007.

Description

Rhizome long creeping, 1–4 mm diam., bearing fronds 1–3 cm apart, densely scaly throughout; scales lanceolate, 5–14 mm long with tailed apex, 0.7 mm broad, dark brown to nearly black at central portion, the other part deep brown to paler, hairy at margin. Fronds simple. Stipes 2–5(–27) cm long, pale brown to darker, scaly at base, glabrescent. Laminae linear-lanceolate, 22–65 by 0.8–4(–5.7) cm, very gradually narrowing towards both apex and base; midrib distinctly raised beneath, veins hardly visible, anastomosing, upper surface glabrescent, lower surface densely covered with greyish to pale brown, stellate hairs with long arms or becoming glabrescent in older fronds; rigid coriaceous, fronds usually involute at margin. Sori round, distinct, covering the whole lower surface of the apical part of fronds, covered with hairs.

Distribution in Thailand

NORTHERN: Tak; SOUTH-WESTERN: Kanchanaburi; PENINSULAR: Nakhon Si Thammarat, Trang.

Distribution in Laos

Unspecified.

Wider Distribution

W Malesia (Sumatra and Malay to the Philippines and Java).

Ecology

On tree trunks or on rocks usually in light shade in mountain forests at medium altitudes.

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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Pyrrosia albicans (Blume) Ching 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 Pyrrosia albicans (Blume) Ching, Bull. Chin. Bot. Soc. 1: 72. 1935; Hovenkamp, Leiden Bot. Ser. 9: 153. 1986; Hovenkamp, Fl. Males., Ser. II, Ferns and Fern Allies 3: 151. 1998. – Nipholobus albicans Blume, Enum. PL. Jav.: 107. 1828. – Cyclophorus albicans (Blume) C.Presl, Epim. Bot.: 131. 1851. – Polypodium albicans (Blume) Mett., Farngatt. 1: 127. 1856. – Type: Reinwardt s.n. (L), Java. Niphobolus flocciger Blume, Enum. Pl. Javae: 107. 1828. – Pyrrosia floccigera (Blume) Ching, Bull. Chin. Bot. Soc. 1: 71. 1935; Holttum, Rev. Fl. Malaya ed. 1, 2: 147. 1955 [‘1954’]; Holttum, Dansk Bot. Ark. 20:18. 1961; Tagawa & K.Iwats., SouthE. Asian Stud. 5: 49. 1978; Tagawa & K.Iwats., Fl. Thailand 3: 500, f. 50.4 & 50.5. 1989; Boonkerd & Pollawatn, Pterid. Thailand: 285. 2000; Newman et al., Checkl. Vasc. Pl. Lao PDR: 30. 2007. Description Rhizome long creeping, 1–4 mm diam., bearing fronds 1–3 cm apart, densely scaly throughout; scales lanceolate, 5–14 mm long with tailed apex, 0.7 mm broad, dark brown to nearly black at central portion, the other part deep brown to paler, hairy at margin. Fronds simple. Stipes 2–5(–27) cm long, pale brown to darker, scaly at base, glabrescent. Laminae linear-lanceolate, 22–65 by 0.8–4(–5.7) cm, very gradually narrowing towards both apex and base; midrib distinctly raised beneath, veins hardly visible, anastomosing, upper surface glabrescent, lower surface densely covered with greyish to pale brown, stellate hairs with long arms or becoming glabrescent in older fronds; rigid coriaceous, fronds usually involute at margin. Sori round, distinct, covering the whole lower surface of the apical part of fronds, covered with hairs. Distribution in Thailand NORTHERN: Tak; SOUTH-WESTERN: Kanchanaburi; PENINSULAR: Nakhon Si Thammarat, Trang. Distribution in Laos Unspecified. Wider Distribution W Malesia (Sumatra and Malay to the Philippines and Java). Ecology On tree trunks or on rocks usually in light shade in mountain forests at medium altitudes. 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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Pyrrosia albicans (Blume) Ching