Korthalsia rostrata Blume

Slender clustering rattan. Stems high-climbing and branching, to 20 m or more long, without sheaths 0.6–0.9 cm diam., with sheaths 0.8–1.5 cm diam., internodes to 10 cm. Leaf cirrate; sheaths dull green with scattered short black-tipped spines to 0.2 cm; ocrea not exceeding 3 x 2 cm, inflated armed, with very short scattered spines to 3 mm; ants abundant. Leaf to 1.1 m including the cirrus to 60 cm; petiole short to well-developed, 3–15 cm; leaflets 3–7 on each side of the rachis, generally broad rhomboid, to 20 x 10 cm borne on short stalks to 3 mm, rarely (see below) narrow lanceolate, to 22 x 2 cm, upper leaflet surface dark green, lower surface whitish. Inflorescences borne on up to 4 topmost nodes, to 50 cm, bearing up to 10 rachillae; rachillae slender c. 8 x 0.7 cm, densely brown tomentose. Fruit to 2 x 1.2 cm, somewhat obovoid, covered in 15–18 vertical rows of orangey-brown scales. Seed c. 1.5 x 0.8 cm; endosperm deeply ruminate. Seedling leaf bifid, with praemorse tips.