Asplenium polyodon G.Forst.

Family

Aspleniaceae

Nomenclature

Asplenium polyodon G.Forst., Fl. Ins. Austr.: 80. 1786; Parris & Latiff, Malayan Nat. J. 50: 241. 1997.

Asplenium falcatum Lam., Encycl. (Lamarck) 2: 306. 1786; Bedd., Handb. Ferns Brit. India: 150. 1883; Tardieu & C.Chr., Fl. Indo-Chine 7(2): 229. 1940; Sledge, Bull. Brit. Mus. (Nat. Hist). Bot. 3: 261. 1965; Tagawa & K.Iwats., Fl. Thailand 3: 284. 1985; Boonkerd & Pollawatn, Pterid. Thailand: 141. 2000.

Asplenium adiantoides (L.) C.Chr., Index Filic.: 99. 1905, non Lam. 1786; Bonap., Notes Ptérid. 14: 57. 1923; E.Smith, J. Siam Soc. Nat. Hist. Suppl. 8: 4. 1929; Holttum, Rev. Fl. Malaya ed. 1, 2: 431, f. 250. 1955 [‘1954’].

Description

Incorporating data from Flora of Australia.
Epiphytic or lithophytic. Rhizome short creeping, scaly. Stipes dark reddish brown, 9–65 cm long. Laminae 15–120 cm long, 5–26 cm wide; pinnae 10–40 pairs, ovate to falcate, base cuneate but unequal, stalked, apex acuminate, lobed to 1/3 way towards costa, up to 12 by 2 cm in Thailand (3–17 cm long, 7–27 mm wide in Australia), longest pinnae around middle; veins more or less visible, forming narrow angles with costa. Sori long, usually occupying the whole length of veinlets from near costa to near margin, up to 2 cm long; indusia herbaceous , open to posterior side.

Distribution in Thailand

EASTERN: Buri Ram; PENINSULAR: Chumphon, Nakhon Si Thammarat, Phatthalung, Phangnga.

Distribution in Cambodia

Kompong Chhnang.

Wider Distribution

Old World tropics.

Ecology

On mossy trunks in mountain forests or lithophytic on limestone rocks.

Similar species

Asplenium contiguum Kaulf.

Proposed IUCN Conservation Assessment

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

Voucher specimens - Thailand

Middleton et al. 5395, Phatthalung, Wat Tham Phra Non (E); Middleton et al. 5429, Phangnga, Tham Pha Phueng (E); Middleton et al. 5461, Phangnga, Phangnga Town Park (E).

Voucher specimens - Cambodia

Muller 764, Kompong Chhnang, Phnom Chom (P).

Habit

Habit

Frond from above

Frond from above

Frond from beneath

Frond from beneath

Rachis showing confluence of groove with costae

Rachis showing confluence of groove with costae

Pinnae

Pinnae

Pinna

Pinna

Pinnae

Pinnae

Young sori

Young sori

Older sori

Older sori

Site hosted by the Royal Botanic Garden Edinburgh. Content managed by Stuart Lindsay, Gardens by the Bay, Singapore and David Middleton, Singapore Botanic Gardens. Last updated 16 November 2016.