Dimorphocalyx muricatus (Hook.f.) Airy Shaw, Kew Bull. 20 (1966)

Latin for 'spiny'.

Dimorphoxalyx muricatus var. minor (Hook.f.) Airy Shaw
Ostodes muricata Hook.f.
Ostodes muricata var. minor Hook.f.
Trigonostemon asahanensis Croizat

Understorey tree up to 15 m tall and 15 cm dbh. Stipules ca. 4 mm long. Leaves alternate, simple, penni-veined, large, glabrous, toothed margin. Flowers ca. 5 mm diameter, green-whitish, placed in corymbs. Fruits ca. 17 mm long, green-yellowish, dehiscent, warty capsules.

In undisturbed mixed dipterocarp, keranga and sub-montane forests up to 1000 m altitude. Often along riversides and on hillsides with clay soils, but also found on sand and limestone.

Thailand, Peninsular Malaysia, Sumatra, Borneo (Sarawak, Brunei, Sabah, South- and East-Kalimantan), Moluccas.

Local names
Borneo: Marok.