Canthium horridum Blume, Bijdr. Fl. Ned. Ind. (1827)

Latin for 'thorny', referring to the spines along the stem.

Canthium horridum var. xanthocaulon (Miq.) Miq.
Canthium pauciflorum Blanco
Canthium scandens var. xanthocaulon Miq.
Canthium zizyphinum Wall. [Invalid]
Dondisia horrida (Blume) Korth.
Hyptianthera rhamnoides Zoll. & Moritzi
Plectronia horrida (Blume) K.Schum. [Illegitimate]
Plectronia horrida (Blume) Benth. & Hook.f. ex Kurz

Under storey tree up to 13 m tall and 11 cm dbh. Stem with spines originating from leaf axils. Stipules ca. 3.5 mm long, triangular. Leaves opposite, simple, penni-veined, glabrous to hairy. Flowers ca. 4 mm diameter, white-yellow, with short corolla tube, placed in axillary bundles. Fruits ca. 11 mm diameter, green-yellow-orange, globose drupes.

In secondary regrowth forests (especially along roads) and open sites in undisturbed mixed dipterocarp forests up to 600 m altitude. On hillsides and ridges, but also on alluvial sites. On sandy soils.

The fruits (boiled) are used to treat foot wounds.

Southern China, Indo-China, Thailand, Peninsular Malaysia, Sumatra, Java, Borneo (Sarawak, Brunei, Sabah, South- and East-Kalimantan), Philippines.

Local names
Borneo: Rukam, Terakang.