Calamus tenuis Roxb.

Mehmud, Selim & Roy, Himu, 2021, Diversity and distribution of palms (Arecaceae) in Assam, India, Check List 17 (1), pp. 69-93 : 80

publication ID	https://doi.org/ 10.15560/17.1.69
persistent identifier	https://treatment.plazi.org/id/284487AF-FFA1-FF95-3B11-FC2FFB3DF850
treatment provided by	Marcus
scientific name	Calamus tenuis Roxb.
status

Treatment

Calamus tenuis Roxb. View in CoL

Figure 6C

Diagnostic characters. Stems clustered, climbing, 9–20 m long and with leaf sheath ca 2 cm in diameter; leaf sheath green, spines 1.5–2.5 cm long; indumentums white; flagella 1–1.1 m long. Knee 2.8–3 cm long, spiny; ocrea 5–6 mm long, unarmed. Leaf pinnate, ecirriate, 1–1.2 m long; leaflets regular, linear-lanceolate, serrated, acuminate, 30–34 in number, 29–31 cm long, 2–2.6 cm wide, equidistant, veins 3. Staminate inflorescence 2.5–3 m long, flagellate; partial inflorescences 6–9 in number, 10–22 cm long; rachillae alternate, 3–5 cm long. Pistil- late inflorescence 2.5 m long; partial inflorescences 10– 13 cm long; rachillae alternate, 2–3 cm long with dyad flowers. Fruit ovate to spherical, ca 1.1 cm long, perianth tubular, scales in 15 vertical rows.

Flowering and fruiting. July to September and December to March, respectively.

Distribution. Throughout Assam; prefers waterlogged plains.

Vernacular names. Jati Bet, Pani Bet (Assamese).

Uses. For furniture (cane), masticator (fruit) food (apical stem).

Material examined. INDIA • 1 ♂; Assam, North Lakh- impur; Jan. 1940; no. 19010; ASSAM 30943 . • Assam, Barpeta, Pathsala ; 26°30′24″N, 091°14′38″E; 18 Feb. 2018; S. Mehmud leg. GoogleMaps ; CH, ASSAM 96233 About ASSAM .