Oleandra musifolia (Blume) C.Presl

Family

Oleandraceae

Nomenclature

Oleandra musifolia (Blume) C.Presl, Epimel. Bot.: 42. 1851 [‘1849’]; Bedd., Handb. Ferns Brit. India: 287. 1883; Tardieu & C.Chr., Fl. Indo-Chine 7(2): 284. 1940; Ching, Fl. Reipubl. Popularis Sin. 2: 321. 1959; Holttum, Dansk Bot. Ark. 23: 235. 1965; Tagawa & K.Iwats., SouthE. Asian Stud. 5: 78. 1967; Tagawa & K.Iwats., Fl. Thailand 3: 181. 1985; Boonkerd & Pollawatn, Pterid. Thailand: 175, 239. 2000. – Aspidium musifolium Blume, Enum. Pl. Javae: 141. 1828.

Description

Rhizome long creeping with long stiff prop roots, up to 5 mm diam., bearing a few fronds in scattered tufts, densely scaly throughout; scales appressed, lanceolate, round to moderately acute at basal edge, gradually narrowing from the broadest attached portion to tailed apex, about 7 by 1.2 mm, brown with dark attached point, paler and hairy at margin of apical portion. Fronds simple. Stipes usually short, up to 5(–8.5) cm including phyllopodia to 2 cm (very exceptionally to 6.5 cm) tall, bearing both scales and hairs. Laminae linear-lanceolate, caudately acuminate at apex, gradually narrowing towards narrow and cuneate base, up to 80 by 5 cm, the margin entire and usually plane; midrib raised below, scaly with peltate, lanceolate, pale brown scales of up to 3 mm long, herbaceous, light green; veins once or twice forked near midrib, all free, ending just inside narrow cartilaginous margin; glabrous to sparsely hairy above and beneath, glabrous to densely hairy at margin. Sori irregular row near midrib; indusia up to 2 mm in breadth, glabrous (exceptionally sparsely hairy ).

Distribution in Thailand

NORTHERN: Chiang Mai, Lamphun, Phrae, Tak, Phitsanulok; NORTH-EASTERN: Phetchabun, Loei; SOUTH-WESTERN: Kanchanaburi; CENTRAL: Nakhon Nayok; SOUTH-EASTERN: Chanthaburi; PENINSULAR: Ranong, Phangnga.

Distribution in Laos

Champasak.

Wider Distribution

Sri Lanka, Indochina to Malesia.

Ecology

On tree trunks, in crevices of rocks, or on Sphagnum-bog in sunny places in light shade at 1100– 1500 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. 5062, Phitsanulok, Phu Hin Rong Kla National Park (E).

Voucher specimens - Laos

Lamxay et al. 1940, Champasak (E)

Habitat

Habitat

Habit

Habit

Habit

Habit

Habit

Habit

Whole plant

Whole plant

Rhizome

Rhizome

Rhizome scales

Rhizome scales

Articulartion between stipe and phyllopodium

Articulartion between stipe and phyllopodium

Venation

Venation

Scales on lamina midrib beneath

Scales on lamina midrib beneath

Lower surface of lamina and sori

Lower surface of lamina and sori

Lower surface of lamina and sori

Lower surface of lamina and sori

Sori

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.