Calamus blumei Becc.

Clustering moderate rattan. Stem climbing to 20 m, without sheaths 0.8–1.2 cm diam., with sheaths to 2 cm diam., internodes to 25 cm. Leaf ecirrate; sheaths dull green but densely covered in greyish-yellow scales, drying grey, and scurfy caducous chocolate-coloured scales, and sparsely armed with short ± upward pointing spines to 3 mm, frequently borne on bulbous swellings; knee conspicuous; ocrea to 2 cm, dark brown; flagellum to 1.5 m; petiole to 15 cm; rachis to 45 cm long; leaflets to 6 on each side of the rachis, broad diamond-shaped, with short stalks and bristly wavy margins, to 20 x 7.5 cm, with 5–7 main nerves. Inflorescences to 1.25 m, the male and female superficially similar, the male branched to 3 orders, the female to 2 orders, with 3–4 partial inflorescences to 35 cm; male rachillae c. 20 x 1.5 mm, female to 70 x 3 mm. Mature fruit rounded to obovoid or ellipsoid, to 2.6 x 2.2 cm, covered in 18–20 vertical rows of yellowish to brownish scales. Seed to 2 x 1.3 cm; endosperm deeply ruminate. Seedling leaf with 2 diamond-shaped leaflets.