Haplopteris amboinensis (Fée) X.C.Zhang
Pteridaceae, subfamily Vittarioideae
Haplopteris amboinensis (Fée) X.C.Zhang, Ann. Bot. Fennici 40: 460. 2003. – Vittaria amboinensis Fée, Mém. Foug., 3. Hist. Vittar. 14, t. 1, f. 1. 1852; Bedd., Handb. Ferns Brit. India: 407. 1883; Ching, Sinensia 1: 189. 1931; Tardieu & C.Chr., Fl. Indo-Chine 7(2): 199. 1940; Tagawa & K.Iwats., SouthE. Asian Stud. 5: 112. 1967; Tagawa & K.Iwats., Fl. Thailand 3: 226. 1985; Boonkerd & Pollawatn, Pterid. Thailand: 135. 2000.
Vittaria forrestiana auct. non Ching: Tardieu &. C.Chr., Fl. Indo-Chine 7(2): 200, f. 24.1 & 24.2. 1940; Tagawa & K.Iwats., SouthE. Asian Stud. 5: 112. 1967; Tagawa & K.Iwats., Fl. Thailand 3: 227, f. 17.6. 1985; Boonkerd & Pollawatn, Pterid. Thailand: 136. 2000.
Vittaria scolopendrina auct. non (Bory) Thwaites.: Holttum, Dansk Bot. Ark. 20: 34. 1961.
Rhizome short creeping, about 3.5 mm diam., bearing a mass of roots, densely scaly throughout; scales narrow, subulate at apex, up to 10 by 1.5 mm, dark brown to blackish, clathrate, minutely toothed at margin. Stipes indistinct or distinct and up to 15 cm or more long, dark castaneous on the lower portion, very narrowly winged almost to the very base. Laminae linear-lanceolate, gradually narrowing towards acuminate to caudate apex, gradually narrowing downwards into wings of stipe, up to 70 cm long including stipe, up to 2.5 cm broad, the margin flat or slightly recurved, coriaceous or thicker; costa distinctly raised on lower surface, distinct on upper surface, veins hidden. Sori superficial, submarginal, almost throughout the margin of frond except for the apex and lowermost portion.
Distribution in Thailand
NORTHERN: Chiang Mai, Tak, Phitsanulok; NORTH-EASTERN: Loei; EASTERN: Nakhon Ratchasima; SOUTH-EASTERN: Chanthaburi; PENINSULAR: Krabi, Trang.
Distribution in Laos
N India, Burma, Laos, Vietnam, Malaysia, Indonesia.
On tree trunks or in crevices in sandstome rocks, usually in evergreen forests at medium or high altitudes.
Proposed IUCN Conservation Assessment
Least Concern (LC). This species is widespread and not under any known threat.
This species was reported as occurring in Cambodia in the Flora of Thailand account. However, we have found no material from Cambodia.
Voucher specimens - Thailand
Middleton et al. 5084, Phitsanulok, Phu Hin Rong Kla National Park (E).
Voucher specimens - Cambodia
Poilane 15858, Champasak, Boloven Plateau (P).
Upper surface of frond
Lower surface of frond and interrupted sori
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