Korthalsia flagellaris Miq.

Robust clustering and branching rattan, confined to peat swamp forest. Stems climbing to 40 m or more, without sheaths to 2.5 cm diam. or more, with sheaths to 4 cm or more, internodes to 30 cm, longer in juveniles. Leaf cirrate; sheath ± unarmed, dull reddish-brown, covered in caducous black scales and pale brown hairs; ocrea tightly sheathing, unarmed, covered in scales and indumentum as the sheaths, tending to split opposite the petiole. Mature leaf to 2.5 m including the cirrus to 1 m and petiole to 15 cm. Leaflets 8–20 on each side of the rachis, borne on long stalks, narrow, to 30 x 4.5 cm, dark bluish-green on the upper surface, brownish on the under-surface, with frequent bands of deciduous chocolate-coloured scales. Inflorescences to 75 cm, highly branched; rachillae numerous, to 12 x 0.7 cm, dull brown tomentose. Fruit to 20 x 12 mm, covered in 19–21 vertical rows of straw-coloured scales. Seed 1.2 by 0.9 cm; endosperm deeply ruminate. Seedling leaf entire; juvenile leaves often very large and entire with blades reaching 1 by 0.3 m.