Dioon spinulosum Dyer ex Eichl., Gart.-Zeitung (Berlin) 1883: 411 1883.;
Mexico (Veracruz, Oaxaca) as per POWO;

Dioon spinulosum, giant dioon, or gum palm, is a cycad endemic to limestone cliffs and rocky hillsides in the tropical rainforests of Veracruz and Oaxaca, Mexico.[1][2]
It is one of the tallest cycads in the world, growing to 12m in height. The tree is found at low elevations to 300 m above sea level.[1]
Dioon spinulosum prefers well-drained soil with regular water. It will grow in soils containing few nutrients, in soils rich in limestone, and on slopes. It is hardy to USDA Zones 9B – 11.
Dioon spinulosum has pinnate leaves that grow to about 5-7 ft (1.5-2.1 m) in length and radiate out from the trunk. The 120-240 leaflets on each leaf are small and flat, have small thorns and taper to a sharp point.
(From Wikipedia on 18.12.13)

Gymnosperms Fortnight-Zamiaceae-Dioon spinulosum from Delhi-GS-25 : Attachments (3). 2 posts by 2 authors.
Dioon spinulosum, photographed from Delhi University Flower show.

Thank you Sir for this upload, this identifies mine recent upload….

Attached are pictures of a plant captured in Sagar Upvan, Mumbai in February 2012.
Requested to please provide ID.

This is Dioon spinulosum.


GYMNOSPERMS FORTNIGHT :: Zamia 4 for id from Panipat-NS 24 : Attachments (3). 6 posts by 4 authors.
This one is also from a nursery in Panipat..
Please help to identify..

This is not Zamia !! May be … can tell us. This plant is there in the lawn in the centre of Botany department at Delhi unviersity.
Could be a Dioon sp.!! may be Dioon spinulosum

Yes you are right … I will upload mine soon.

Pl. also see earlier feedback in the … post before taking any final decision:
14082011-BS-001: cycas sp for id from Arya PG College Panipat:

This should be Dioon spinulosum.


14082011-BS-001: cycas sp for id from Arya PG College Panipat:

A sp of Cycas i think for id
Brought from a Nursery in Panipat now in My College Never seen anywhere else (Panipat 200 mts)
Fronds about 20-25 inch spines on margins. leaflets about 4-5 inches
no cone seen

It could be Dioon edule (or another similar Dioon)

Not Cycas but Dioon spinulosum or edule may be.
In Delhi University botany department you will find big plants of this with some other cycads.

This attachment could be of some use.

a few more pics of same plant

I stick to my original comment – probably Dioon edule. Cones would be needed to be certain.

Thanks … i will try to see Cones also

Dioon spinulosum as per another thread

Yes looks like Dioon spinulosum to me too.
Very strange, there are so many Encephlartos in gardens in India but so far no one shared. Its there even at Delhi University.


Leave a Reply

Your email address will not be published. Required fields are marked *