Dioon tomasellii

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Figure 1. D. tomasellii leaf detail.


Distribution & Habitat:

Mountainous pine forests of Western Mexico, between 950 and 1100m.

The variety sonorense is found in Sonora, and northern Sinaloa.


A small to medium sized cyacd to about 1m tall, with obliquely erect leaves to about 2m long. Leaves are light-green, and flat in cross-section.

The variety sonorense has leaflets inserted onto the rhachis at an acute angle.


Sunny, well drained position, in the tropics or sub-tropics.

Figure 2. D. tomasellii var sonorense.
Figure 3. D. tomasellii at Quail Gardens.

Contributed by:

Colin Wilson (Figure 1,2&3)

External Links:

Cycad Pages, IUCN, JSTOR, Trebrown

Google, Google Images, Flickr, PACSOA Forums