Lepisorus subconfluens Ching
Lepisorus subconfluens Ching, Bull. Fan Mem. Inst. Biol. 4: 85. 1933; Bir & Trikha, Amer. Fern J. 64: 60. 1974; Tagawa & K.Iwats., Fl. Thailand 3: 514, f. 51.2. 1989; Boonkerd & Pollawatn, Pterid. Thailand: 275. 2000. – Pleopeltis subconfluens (Ching) Tagawa & K.Iwats., Acta Phytotax. Geobot. 22: 100. 1967; Tagawa & K.Iwats., SouthE. Asian Stud. 5: 49. 1967.
Polypodium lineare auct. non Thunb.: C.Chr., Contr. U.S. Natl. Herb. 26. 334. 1931.
Rhizome creeping, about 2.5 mm diam., bearing fronds rather closely spaced near apex, scaly; scales oblong-subtriangular with round base and long-attenuate apex, up to 3 by 1 mm, sharply toothed at margin, dark brown to nearly black, the basal marginal portion brown and more or less clathrate. Stipes up to 3 cm long, indistinct from the base of laminae, scaly at base, dark stramineous to nearly black. Laminae linear, up to 30 by 1.2 cm, commonly about 20 by 0.8 cm, attenuate towards both ends; leathery. Sori medial, round to elliptic, about 2.5 mm broad, up to 5 mm long, sometimes fusing to the next ones; the sterile portion of laminae usually revolute, in contrast to the remaining soriferous portion. Spores monolete .
Distribution in Thailand
NORTHERN: Chiang Mai, Chiang Rai, Phitsanulok.
Bhutan and SW China (Yunnan).
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. 4872, Chiang Mai, Doi Suthep (E); Middleton et al 5058, Chiang Mai, Doi Pha Hom Pok National Park (E); Middleton et al. 5098, Phitsanulok, Phu Hin Rong Kla National Park (E).
Rhizome and stipe bases
Frond from beneath
Lower surface of frond with sori
Lower surface of frond
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