Pteris plumbea Christ
Pteridaceae, subfamily Pteridoideae
Pteris plumbea Christ, Not. Syst. 1: 49. 1909; Tardieu & C.Chr., Fl. Indo-Chine 7(2): 150. 1940; Tagawa & K.Iwats., SouthE. Asian Stud. 5: 82. 1967; Tagawa & K.Iwats., Fl. Thailand 3: 255. 1985; Boonkerd & Pollawatn, Pterid. Thailand: 130. 2000.
Rhizome short, erect; scales linear, up to 1.2 cm long, deep brown, more or less crisped. Stipes stramineous, scaly at base, puberulous upwards, 15–20 cm long in sterile frond, 30–40 cm in fertile one. Laminae pinnate, oblong-ovate in outline, 15–30 cm; lateral pinnae simple, forked or trifoliolate, usually more branched in fertile ones, narrowly cuneate at base, caudately acuminate at apex, sharply and minutely serrate at margin of sterile pinnae, up to 13 by 2.5 cm in sterile pinnae, up to 18 by 1.2 cm in fertile pinnae, shortly stalked or sessile in upper pinnae, chartaceous, deep green, glabrous; veins visible on lower surface. Sori continuous from base nearly to apex of pinnae; indusia thin but firm , brown.
Distribution in Thailand
NORTH-EASTERN: Loei; SOUTH-EASTERN: Chon Buri, Chanthaburi; PENINSULAR: Surat Thani, Satun.
Distribution in Cambodia
China and Indochina.
On rather dry mountain slopes in mixed forests at medium altitudes.
Proposed IUCN Conservation Assessment
Least Concern (LC). This species is widespread and not under any known threat.
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