Belvisia annamensis (C.Chr.) Tagawa

Family

Polypodiaceae

Nomenclature

Belvisia annamensis (C.Chr.) Tagawa, Acta Phytotax. Geobot. 22: 107. 1967; Tagawa & K.Iwats., SouthE. Asian Stud. 5: 51. 1967; Tagawa & K.Iwats., Fl. Thailand 3: 521. 1989; Hovenkamp & Franken, Fl. Males., Ser. II, Ferns and Fern Allies 3: 28. 1998; Boonkerd & Pollawatn, Pterid. Thailand: 263. 2000; Newman et al., Checkl. Vasc. Pl. Lao PDR: 29. 2007. – Hymenolepis annamensis C.Chr., Dansk Bot. Ark. 6(3): 68, f. 1. 1929; Tardieu & C.Chr., Fl. Indo-Chine 7(2): 452, f. 53.1 & 53.2. 1941. – Lepisorus annamensis (C.Chr.) Li Wang, Bot. J. Linn. Soc. 162(1): 35. 2010. – Type: Vietnam, Poilane 8010 (P).

Belvisia callifolia auct. non (Christ) Copel.: Holttum, Dansk Bot. Ark. 20: 19. 1961.

Description

Epiphytic. Rhizome short creeping, about 2–2.5(–4) mm diam., bearing closely spaced fronds, densely scaly throughout; scales oblong-ovate, acuminate at apex, round at base, 2–8.3 by 1–2.1 mm, brown, clathrate, toothed at margin. Stipes (1–)3–5 cm long, narrowly winged on upper portion, scaly at base, stramineous to pale castaneous. Laminae lanceolate, broadest at 1/3 way from base, gradually narrowing upwards, cuneate at base, plane at margin, 10–15(–30) cm long excluding the fertile apical portion, 2–3.2(–5) cm broad; thin chartaceous; lateral main veins more or less distinct, the other veins hardly visible, copiously anastomosing; fertile portion continuously narrowing from the narrow apices of the sterile portion, about 5 by 0.5 cm, bearing a pair of medial linear sori .

Distribution in Thailand

NORTHERN: Tak; CENTRAL: Nakhon Nayok; SOUTH-EASTERN: Trat; PENINSULAR: Chumphon, Ranong, Trang.

Distribution in Laos

Savannakhet.

Wider Distribution

Laos and Vietnam.

Ecology

On mossy tree trunks in light shade or in dense forests usually in moist places at medium altitudes.

Proposed IUCN Conservation Assessment

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

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