Treelet, 5-12 m high, dbh c. 8 cm; Branchlets sericeous when young; Leaves 2-5-jugate; Inflorescences axillary to pseudoterminal, branching along the flattened to terete, sericeous, 3.1-15 cm long axis; Flowers c. 3 mm in diam. Sepals 5, ovate, margin (and outside) pilose, margin with glands, inside glabrous; Petals 5, elliptic, 3-3.2 by 1.2-1.5 mm, blade obovate, gradually decurrent into the c. 0.5 mm high claw, margin pilose, outside and inside glabrous, apex acute; Stamens 8; Fruits with 1-3 well developed lobes, 1-1.4 by 1-1.7 cm, slightly ribbed, glabrous, red when fresh, blackish when dry; Seeds obovoid, c. 9 by 6 mm;
Asia-Tropical, Milne Bay Prov present, Papua New Guinea present, Rossel Island present
Malesia: Papua New Guinea (Milne Bay Prov.: Rossel Island).
Guioa plurinervis belongs to the G. ri-gidiuscula-complex. It is characterized by its falcate leaflets, which are papillate below.