Calamus thwaitesii
{{Short description|Species of plant}}
{{Speciesbox
| genus = Calamus (palm)
| species = thwaitesii
| authority = Becc.
| synonyms = Calamus thwaitesii var. canaranus Becc.
}}
Calamus thwaitesii is a species of rattan palm in the family Arecaceae. It is native to Southwest India and Sri Lanka.{{Cite web|url=http://powo.science.kew.org/taxon/urn:lsid:ipni.org:names:665453-1|title=Calamus thwaitesii Becc. | Plants of the World Online | Kew Science|website=Plants of the World Online}}{{Catalogue of Life
|id=5X6WZ
|title=Calamus thwaitesii Becc.
|option=
|access-date= 13 January 2023