Agathis orbicula

de Laub. 1979

Common names

Tumuh [Murut]; tubu [Kenyah]; bulok [Iban] (de Laubenfels 1988); Sarawak kauri (Silba 1986).

Taxonomic notes

Description

Tree: Heights to 40 m (Silba 1986).
Bark: Dark brown, exfoliating in irregular plates, with few scattered lenticels; internally granular and reddish-brown; sap produces a yellowish resin (Silba 1986).
Leaves: Oval to circular, obtuse or bluntly acute, closely set, glaucous beneath, 2.4-3.6 × 1.2-2.4 cm, on a short peduncle. Juvenile leaves round, acute, to 6.5 × 2.8 cm, also on a short peduncle (Silba 1986).
Cones: Oval when young, mature dimensions to 7 × 4.5 cm (Silba 1986).
Cone scales: Upper edges of scales imbricate, later elliptic (Silba 1986).
Pollen cones: Ovate or cylindrical, 9-14 × 4-6 mm, on a 2-3 mm long peduncle. Scale apices rounded; exposed parts of microsporophylls 'humpy' (Silba 1986).

Distribution and Ecology

Borneo: Sabah, Ulu Moyah; Sarawak: Bumbong Rumah, at 450-1050 m (Silba 1986). Scattered in rainforest and kerangas on low mountains and plateaus (de Laubenfels 1988).

The IUCN reports that this species is facing a high risk of extinction in the wild due to a limited and severely fragmented distribution, coupled with ongoing decline in extent and quality of habitat.

Remarkable Specimens

No data as of 2023.02.22.

Ethnobotany

No data as of 2023.02.22.

Observations

No data as of 2023.02.22.

Remarks

Citations

Laubenfels, D. J. de. 1979. The species of Agathis of Borneo. Blumea 25(2):531-542.

See also

The species account at Threatened Conifers of the World.