Diplazium donianum (Mett.) Tardieu

Family

Athyriaceae

Nomenclature

Diplazium donianum (Mett.) Tardieu, Asplen. Tonkin: 58, t. 5. 1932; Tardieu & C.Chr., Fl. Indo-Chine 7(2): 249. 1940; Tagawa & K.Iwats., SouthE. Asian Stud. 5: 102. 1967; Holttum, Rev. Fl. Malaya, ed. 2, 2: 637. 1968; Tagawa & K.Iwats., Fl. Thailand 3: 455, f. 48.4. 1988; Boonkerd & Pollawatn, Pterid. Thailand: 192. 2000. – Asplenium donianum Mett., Fil. Lechl.: 177. 1859.

Athyrium bantamense auct. non (Blume) Milde: Bedd., Handb. Ferns Brit. India: 177, f. 86. 1883; Christ, Bot. Tidsskr. 24: 108. 1901; Holttum, Dansk Bot. Ark. 20: 32. 1961.

Description

Similar to Diplazium bantamense , different in: rhizome creeping, 3–4 mm diam., blackish, scaly on younger part; lateral pinnae 1–4 pairs, stalks distinct, more than 5 mm long, cuneate at base; coriaceous or fleshy; rachis never gemmiferous; sori usually elongate along the whole length of veinlets.

Distribution in Thailand

NORTHERN: Chiang Mai, Tak, Phitsanulok; NORTH-EASTERN: Loei; CENTRAL: Nakhon Nayok; SOUTH-EASTERN: Trat; PENINSULAR: Nakhon Si Thammarat.

Distribution in Laos

Khammouane.

Distribution in Cambodia

Kampot

Wider Distribution

N India to S China and Taiwan, north to S Japan, south to Indochina.

Ecology

On mountain slopes in light shade or in dense evergreen forests at low elevations lower than 800 m alt.

Proposed IUCN Conservation Assessment

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

Notes

The Doi Suthep plant has 4–5 pairs of very narrow lateral pinnae, 2–3 cm in breadth and rounded at base .

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