Oleandra wallichii (Hook.) C.Presl

Family

Oleandraceae

Nomenclature

Oleandra wallichii (Hook.) C.Presl, Tent. Pterid.: 78. 1836; Bedd., Handb. Ferns Brit. India: 287, f. 147. 1883; Tardieu & C.Chr., Fl. Indo-Chine 7(2): 284. 1940; Ching, Fl. Reipubl. Popularis Sin. 2: 321. 1959; Holttum, Dansk Bot. Ark. 20: 26. 1961; Tagawa & K.Iwats., SouthE. Asian Stud. 5: 78. 1967; Tagawa & K.Iwats., Fl. Thailand 3: 179, f. 13.4. 1985; Boonkerd & Pollawatn, Pterid. Thailand: 176, 240. 2000. – Aspidium wallichii Hook., Exot. Fl. 1: t. 5. 1823.

Description

Rhizome long creeping, 3–4 mm diam., green or somewhat glaucous, bearing 1–3 fronds in distant tufts, densely scaly throughout; scales not appressed, oblong with long tails, round at basal edge, about 6 mm long including tails of 4 mm, 0.7 mm broad, dark brown, entire, sparsely short-hairy at apical margin. Fronds simple. Stipes dark brown to darker, 0.5–3 cm long, usually with scales and hairs, with phyllopodia less than 1 cm high. Laminae linear-lanceolate, rather suddenly narrowed, and cordate at apex, round at base, up to 35 by 4 cm, herbaceous, hairy, densely especially at margin; midrib raised below, densely scaly and hairy. Sori in one row on each side of midrib and close to it; indusia up to 1.5 mm in breadth, minutely hairy .

Distribution in Thailand

NORTHERN: Chiang Mai; NORTH-EASTERN: Loei.

Wider Distribution

Himalayas, Upper Burma, SW China, Taiwan and Vietnam.

Ecology

On mossy tree trunks or on rather dry mountain-slopes in evergreen forests at 1300– 2500 m alt.

Proposed IUCN Conservation Assessment

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

Voucher specimens - Thailand

Middleton et al. 4915, Chiang Mai, Doi Inthanon National Park (E); Middleton et al. 4920, Chiang Mai, Doi Inthanon National Park (E).

Habit

Habit

Habit

Habit

Rhizome

Rhizome

Growing apex of rhizome

Growing apex of rhizome

Stipe and base of lamina

Stipe and base of lamina

Upper surface of lamina

Upper surface of lamina

Lower surface of lamin and sori

Lower surface of lamin and sori

Sori

Sori

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