Macaranga pearsonii (Miq.) Merr., Philip. J. Sci. 29 (1926)
Named after ?

Description
Upper canopy trees up to 43 m tall and 86 cm dbh. Twigs usually hollow and ant inhabited, stipules only slightly recurved, up to ca. 9 mm long. Leaves alternate, simple, 3-lobed, sometimes peltate, tripli- to palametly-veined, base usually cordate with several large glands on the margin. Flowers ca. 0.5 mm diameter, green-yellowish, placed in bundles within bracts which are part of large panicles. Fruits ca. 6 mm diameter, greenish, 2-lobed, dehiscent capsules, seeds with red aril.

Ecology
Mainly in disturbed sites in mixed dipterocarp, keranga and sub-montane forests, but since it can becomes so large it is sometimes found in seemingly undisturbed sites. Most common in degraded forest, scrub and roadsides up to 1500 m altitude. Often on hillsides and ridges with sandy to clay soils.

Distribution
Borneo (Sarawak, Sabah, Central-, South- and East-Kalimantan).

Local names in Borneo
Nangsang batu, Sadman.