Family

Polypodiaceae

Nomenclature

Radiogrammitis jagoriana (Mett. ex Kuhn) Parris, Gard. Bull. Singapore 58: 242. 2007. – Polypodium jagorianum Mett. ex Kuhn, Linnaea 36: 128. 1869. – Grammitis jagoriana (Mett. ex Kuhn) Tagawa, Acta Phytotax. Geobot. 10: 284. 1941; Copel., Philipp. J. Sci. 80: 225, f. 85. 1951; Tagawa & K.Iwats., SouthE. Asian Stud. 5: 61. 1967; Tagawa & K.Iwats., Fl. Thailand 3: 585. 1989; Boonkerd & Pollawatn, Pterid. Thailand: 292. 2000.

Description

Rhizome short, suberect, bearing several fronds in a tuft, densely covered with scales; scales oblong-lanceolate, gradually narrowing towards acuminate apex, pale brown, thin, entire, up to 2.5 by 0.5 mm. Stipes up to 1.5 cm long, winged at the upper part, densely hairy with brown setose hairs up to 1 mm in length. Laminae linear, round at apex, entire or a little revolute at margin, gradually narrowing downwards to winged stipes, up to 6 cm by 2.5–4 mm; veins more or less distinct, rather close to each other, simple or forked, the basiscopic branches reaching nearly to the margin, thinly leathery, hairy throughout, hairs shining brown, setose, 1–1.5 mm long, those at margin of laminae usually in stellate clusters. Sori in distinct cavities along midribs, elliptic, 1.5 mm long; sori with setose hairs or not.

Distribution in Thailand

PENINSULAR: Nakhon Si Thammarat, Trang, Yala.

Wider Distribution

Borneo, Philippines, Sulawesi and Taiwan.

Ecology

On mossy tree trunks in dense evergreen forests at high altitudes.

Proposed IUCN Conservation Assessment

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

Voucher specimens - Thailand

Middleton et al. 3675, Yala, Hala-Bala Wildlife Sanctuary (A, BKF).