Hymenophyllum bontocense Copel.




Hymenophyllum bontocense Copel., Phil. J.Sci. 64: 33, pl. 12. 1937; Tagawa & K.Iwats., Fl. Thailand 3: 612. 1989; Boonkerd & Pollawatn, Pterid. Thailand: 73. 2000. – Meringium bontocense (Copel.) Copel., Philipp. J. Sci. 67: 41. 1938; Tagawa & K.Iwats., SouthE. Asian Stud. 5: 36. 1967; Tagawa & K.Iwats., Fl. Thailand 3: 76, f. 5.15. 1979.


Rhizome slender, hairy on the young parts. Stipes slender, wingless or very narrowly winged in the upper part, hairy, 1–2 cm long; rachis winged in the upper part, hairy. Laminae oblong to oblong-lanceolate, round or very moderately acute at apex, bipinnate, 4–6 cm long, 1.3–2.2 cm wide; pinnae 6–8 in pairs, sessile, the upper ones gradually reducing in size, the larger ones oblong-ovate in outline, round to obtuse at apex, unequally cuneate at base; ultimate segments of pinna 5–8, round at apex, sharply serrate at margin, about 1.5 mm broad; green in colour; cell walls thin. Sori at apices of short acroscopic segments, usually on the basal ones only; involucre obconic, with bilabiate mouth, the lips acute, entire .

Distribution in Thailand

PENINSULAR: Nakhon Si Thammarat.

Wider Distribution

Only known from Luzon, and this locality in Thailand.


On moist rocks in dense hill evergreen forest at about 1650 m alt.

Proposed IUCN Conservation Assessment

Data Deficient (DD). This species has a wide disjunct distribution in Luzon and Thailand but its status between is not known.  Further research on the size of the distributions and populations in the Philippines and Thailand is necessary to provide a conservation assessment.

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