The species occurs from northeast and northern central India east through Bangladesh and Myanmar to Thailand, Cambodia and Lao PDR, as well as in Indonesia (Evans et al. 2002, RBG Kew 2011).
The species is found in forest within the active floodplain of rivers, including very degraded habitats and fairly scrubby stands.
(From IUCN Red List (LC) )

 Calamus tenuis is a tree/shrub? : 5 posts by 4 authors.
Recently i was in Bihar>>Paschim Champaran. I came across Swamp forest in which Calamus tenuis was growing Luxuriously. Right now i was making the plant profile for this species but am not able to put this in a tree or a shrub. i referred most of the site where it is referred as climbing palms/ rattans. can any body suggest wheather it falls under tree or a shrub.

Calamus tenuis has tender climbing stems.

Yes … it has got spines alover the stem, rachis as well on leaves and midrib for climbing purpose. i am finding difficulty in assingning a habit for it wheather it is a tree or a shrub or a liana(in extreme taught).

Here is a bit about Calamus tenuis

Climbing, growing in clumps, stem very large, slender, scandent.
Leaves glabrous, pinnate, 45-75 cm long, setose above, leaflets 20-30 on each side, equidistant, alternate, linear lanceeolate, acuminate, gradually becoming smaller upward, setose above, up to 30 cm long and c. 1.5 cm broad. Petiole short, stout and pale; petiole and the nerves of the leaflets armed with straight spines. Leaf sheath armed with flat spines and bearing whip-like armed sterile inflorescence (flagella). Bracts many, elongated, tubular spiny, lower with a short limb and scattered recurved spines, upper shortly scruffy. Inflorescence very long, decompound, primary branches 4-6, flexuose. Flowers minute, male c. 2.5 mm long, secund in 3-4 series, imbricate -suberect. Fruit subglobose, c. 1.5 cm in diameter, mucronate; scales pale.


Palm Tree For ID : Jim Corbett,Uttarakhand : 240513 : AK-3 : Attachments (2).  6 posts by 2 authors.
Palm trees seen only in one place inside the Jim Corbett National Park, Uttarakhand on 25/3/13.
Sorry I have only one picture taken from a long distance as it was not possible to leave the vehicle and go closer inside the jungle.

These are rattan, probably, Calamus rotang. They are very spiny and very hamrful. I have been stuck with them many times and they hurt badly :((
Hope you didnt go in. You can find them near shallow water streams with good light.
Stem and leaves are used in making baskets….

These could be Calamus tenuis.

Calamus tenuis. They are distributed all over wet areas in shivaliks. Near hardwar they are abundant along the streams.

Arecaceae Fortnight 1-14 Aug 2014: Calamus tenuis from Uttarakhand_DSR_3 : 3 posts by 3 authors. Attachments (2).
Calamus tenuis Roxb. is a common cane in Tarai areas of Uttarakhand. 

Thanks … for these valuable additions. Could you please integrate them and add to the list included in the introduction.


Araceae, Arecaceae and Zingiberaceae Fortnight: August 1 to 14, 2014 : Arecaceae : Calamus tenuis : Jim Corbett : 210814 : AK-84 : 1 post by 1 author. Attachments (1).
Seen inside Jim Corbett National Park.
Identified by … on our group.


AKNOV10 Calamus tenuis : 3 posts by 2 authors. No images seen now.
A Rattan from FRI, Dehradun

Beautiful pics …, you visited at right time..

Calamus sp. from Assam KD 03 Jul 22: 5 images.
Attached images are Calamus tenuis Roxb. Please Validate.
Date :26.07.2022
Location: Assam
Family : Arecaceae
Genus & species : Calamus tenuis Roxb  (??)
Habitat: Grows wild near the ditches
Habit : Climber

Calamus erectus and C. rotang…… fruit is edible after removing epicarp. The fruit is available in shillong and Assam districts. Underutilized fruit and need to be promoted. 

yes, looks like Calamus tenuis