Calamus is a genus of the palm family Arecaceae. These are among several genera known as rattan palms. There are an estimated 400 species in this genus, all native to tropical and subtropical Asia, Africa, and Australia. They are mostly leaf-climbers with slender, reedy stems. To aid scrambling some species have evolved hooks on the underside of the midrib, or more commonly by modified pinnae in the form of stout, backward-pointing spines. These stems may grow to lengths of 200 metres. 
- Calamus adspersus
- Calamus aruensis Becc. - Bamaga wait-a-while
- Calamus australis Mart.- lawyer cane, wait-a-while or hairy mary 
- Calamus caryotoides Mart. - fishtail lawyer cane
- Calamus compsostachys
- Calamus egregius
- Calamus gibbsianus
- Calamus moti F.M.Bailey
- Calamus muelleri H.Wendl. - southern lawyer vine
- Calamus nambariensis
- Calamus obovoideus
- Calamus radicalis H.Wendl. & Drude
- Calamus rotang
- Calamus suaveolens W.J.Baker & J. Dransf.
- Calamus tenuis
- Calamus vitiensis Warb. ex Becc. - : Dunk Island lawyer vine, Mission Beach wait-a-while
- Calamus wailong
- Calamus warburgii K.Schum. - Iron Range wait-a-while
- Calamus zeylanicus
- Kew World Checklist of Selected Plant Families
- Govaerts, R. & Dransfield, J. (2005). World Checklist of Palms: 1-223. The Board of Trustees of the Royal Botanic Gardens, Kew.
- Flora of China, Vol. 23 Page 135, 省藤属 sheng teng sh, Calamus Linnaeus, Sp. Pl. 1: 325. 1753.
- Dictionary of Flowering Plants and Ferns - JC Willis (1960)
- "Calamus". Australian Plant Name Index (APNI), IBIS database. Centre for Plant Biodiversity Research, Australian Government, Canberra. Retrieved 2008-03-28.
- GRIN: C. tenuis
Calamus is a genus of Old World climbers that produce rattan, a structural material used to make furniture of the same name.
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