Dipterocarpus borneensis

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Dipterocarpus borneensis

Description

Young twig, petiole, raceme, midrib, nerves and sometimes tertiary nerves beneath sparsely shortly rust pubescent, mostly caducous; Leaves 7-12 by 3-7 cm, broadly ovate to elliptic; Stipule to 40 by 4-5 mm, linear, acute. Stamens c. 25, shorter than the style; Ovary conical, shortly densely pubescent;

Distribution

Asia-Tropical: Borneo present (Brunei present, Sarawak present), Eastern coastal Sumatra present, Indragiri present, Lingga Arch present, Sambas and Mampawah in W. Borneo present, Sampit to Muara Tewe and Ulu Mahakam in S.E. Borneo present, Singkep present
Malesia: Eastern coastal Sumatra (Indragiri; Lingga Arch.: Singkep); Borneo (Sampit to Muara Tewe and Ulu Mahakam in S.E. Borneo; Sambas and Mampawah in W. Borneo; Sarawak and Brunei).

Notes

Closely resembling D.fagineus but with the ridges of the calyx tube distinctly expanded into narrow wings distally, and with longer tomentum persisting on the nervation beneath.

Citation

Ashton 1964: Man. Dipt. Brun: 24: f. 6, 7
Browne 1955: For. Trees Sarawak & Brunei: 107
Sloot. 1968: Man. Dipt. Brun.: 11