Family

Polypodiaceae

Nomenclature

Goniophlebium subauriculatum (Blume) C.Presl, Tent. Pterid.: 186. 1836; Bedd., Handb. Ferns Brit. India: 323, f. 173. 1883; Rödl-Linder, Blumea 34: 400. 1990; Hovenkamp & Rödl-Linder, Fl. Males., Ser. II, Ferns and Fern Allies 3: 51. 1998; Boonkerd & Pollawatn, Pterid. Thailand: 252, 271. 2000. – Polypodium subauriculatum Blume, Enum. Pl. Javae: 133. 1828; Blume, Fl. Javae Fil: 177, t. 68. 1828; Ching, Contr. Inst. Bot. Natl. Acad. Peiping 2: 51. 1933; Tardieu & C.Chr., Fl. Indo-Chine 7(2): 538. 1941; Holttum, Rev. Fl. Malaya ed. 1, 2: 207, f. 108. 1955 [‘1954’]; Holttum, Dansk Bot. Ark. 20: 21. 1961; Holttum, Dansk Bot. Ark 23: 232. 1965; Tagawa & K.Iwats., SouthE. Asian Stud. 5: 57. 1967; Tagawa & K.Iwats., Fl. Thailand 3: 573. 1989; Newman et al., Checkl. Vasc. Pl. Lao PDR: 30. 2007. – Type: Blume 130 (L), Java.

Goniophlebium molle Bedd., Ferns Brit. India: t. 206. 1867; Bedd., Handb. Ferns Brit. India: 322, f. 172. 1883; Ching, Contr. Inst. Bot. Natl. Acad. Peiping 2: 50. 1933; Tagawa & K.Iwats., SouthE. Asian Stud. 5: 57. 1967; Tagawa & K.Iwats., Fl. Thailand 3: 572. 1989; Boonkerd & Pollawatn, Pterid. Thailand: 271. 2000. – Polypodium beddomei Baker in Hook. et Baker, Syn. Fil. ed. 2: 344. 1874.

Description

Rhizome long creeping, 4–5(–10) mm diam., distinctly glaucous, densely scaly; scales basifixed to pseudopeltate, deltoid to linear, 3–8 by 0.7–1 mm, brown clathrate, toothed at margin. Stipes stramineous or brown, 15–25 cm long, densely scaly at base, minutely scaly upwards or glabrescent. Laminae imparipinnate, lanceolate, (20–)30–70(–250) by (7–)20–25(–50) cm, widest at the base to around the middle, rachis pale brown, minutely scaly throughout, lateral pinnae 25–35 pairs, a few basal pairs usually a little shorter than the next above, deflexed or patent, subopposite, sessile, linear, subcordate or subtruncate, roundly auricled on both sides at base, gradually narrowing from base to long attenuate apex, serrate at margin, patent or slightly ascending, straight or a little falcate, 8–20 cm by 7–18 mm, upper pinnae gradually becoming smaller; terminal pinna not so large, 3–10 cm long, irregularly lobed at basal portion; veins anastomosing to form 1–3 rows of areoles at each side of costa, more or less visible; herbaceous to subcoriaceous, deep green, glabrous or hairy on both surfaces. Sori terminal on simple included veinlets in costal areoles, in one row at each side of costa, costular, more than 1.5 mm diam., distinctly immersed and raised on the upper surface.

Distribution in Thailand

NORTHERN: Mae Hong Son, Chiang Mai, Chiang Rai, Lampang, Tak, Phitsanulok; NORTH-EASTERN: Phetchabun, Loei; SOUTH-WESTERN: Kanchanaburi; SOUTH-EASTERN: Prachin Buri, Chanthaburi.

Distribution in Laos

Champasak, [Peunongs].

Wider Distribution

NE india, SW China, Burma, Laos, Vietnam, throughout Malesia to Australia (Queensland).

Ecology

On tree trunks or on mossy rocks in light shade or at edge of evergreen forests at 700–1400 m alt. {CHECL LOWER ALT; ALSO HAD AS 500-1400 IN OTHER DOC}

Proposed IUCN Conservation Assessment

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

Voucher specimens - Thailand

Middleton et al. 5050, Chiang Mai, Doi Pha Hom Pok National Park (E).