Family

Hymenophyllaceae

Nomenclature

Vandenboschia auriculata (Blume) Copel., Philipp. J. Sci. 67: 55. 1938: Ching, Fl. Reipubl. Popularis Sin. 2: 181, pl. 13, f. 1–2. 1959; Tagawa & K.Iwats., SouthE. Asian Stud. 5: 43. 1967; Tagawa & K.Iwats., Acta Phytotax. Geobot. 23: 52. 1968. – Trichomanes auriculatum Blume, Enum. Pl. Javae: 225. 1828; Bedd., Handb. Ferns Brit. India; 44. 1883; Copel., Philipp. J. Sci. 51: 223. 1933; Tardieu & C.Chr., Fl. Indo-Chine 7(2): 69. 1939; Holttum, Rev. Fl. Malaya ed. 1, 2: 105, f. 41. 1955 [‘1954’]; Tagawa & K.Iwats., Fl. Thailand 3: 83. 1979. – Crepidomanes auriculatum (Blume) K. Iwats, J. Fac. Sci. Univ. Tokyo, Sect. 3, Bot. 13: 528. 1985; Tagawa & K.Iwats., Fl. Thailand 3: 613. 1989; Boonkerd & Pollawatn, Pterid. Thailand: 27, 68. 2000.

Description

Rhizome very long, climbing to several metres, 1.2–1.8 mm diam., densely hairy on the ventral side. Stipes 2–5 cm apart, very narrowly winged in the upper parts, hairy when young, usually less than 2 cm in length; fronds simply pinnate, linear-lanceolate, acuminate at apex, gradually narrowing towards base, 20–30 cm long, 3–5 cm wide; pinnae sessile, rhomboid to oblong, oblique, round at apex, truncate acroscopically and cuneate basiscopically at base, to 3 cm long, 1.5 cm broad, lobed to varying degree, the incisions reaching a quarter of the way or nearly to the costae, the margin of lobes serrate, each tooth containing a single veinlet; green to deep green. Sori terminal on veinlets; involucre tubular with dilated mouth, sessile , narrowly winged, about 2 mm long, 0.6 mm diam.; receptacles long extruded, slender, curved.

Distribution in Thailand

NORTH-EASTERN: Loei; SOUTH-WESTERN: Phetchaburi ; SOUTH-EASTERN: Chanthaburi, Trat; PENINSULAR: Chumphon, Surat Thani, Nakhon Si Thammarat, Pattani, Trang, Yala.

Distribution in Laos

Champasak.

Wider Distribution

N India to Japan, and throughout Malesia to New Guinea.

Ecology

Climbing on tree trunks or on cliffs usually in dense mountain forest rather common at various altitudes.

Proposed IUCN Conservation Assessment

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

Voucher specimens - Thailand

Middleton et al. 4791, Phetchaburi, Kaeng Krachan National Park (E); Middleton et al. 4647, Trat, Khlong Kaew National Park (E).