Dioon spinulosum

From Pacsoa
Revision as of 00:16, 24 November 2013 by Mike Gray (Talk | contribs)

(diff) ← Older revision | Latest revision (diff) | Newer revision → (diff)
Jump to: navigation, search
Welcome to the PACSOA Palms and Cycads wiki !

If you have any information about this plant, please help by updating this article. Once you are registered you can contribute, change, or correct the text, and even add photos on this page. Click on the edit tab above and play around. Any mistake can be easily corrected, so don't be afraid.

Figure 1. A young plant of D. spinulosum


Common Names:

Giant Dioon,
Gum Palm

Distribution & Habitat:

It is found in rocky, limestone evergreen forests in the Mexican states of Veracruz, Oaxaca, and Yucatan at up to 450 metres (1500 feet) above sea level.


The largest of the American cycads, up to 16m (50ft) tall, and 40cm (18in) in diameter. Numerous 1.5-2.0m (4.5-6ft) long, light green, stiff leaves, with a flat cross-section. The female cone is the largest cone of any gymnosperm, (both living and extinct) and can be up to 55cm long, weigh up to 13kg, and contain up to 300 seeds.


An attractive, easily grown and popular plant for the sub-tropics. Prefers full sun/light shade, and a neutral to alkaline well drained soil. The most commonly grown Dioon by a significant margin.

Figure 2. D. spinulosum leaf detail.
Figure 3. Looking into a D. spinulosum.

Kew Gardens

These 2 plants were donated to Kew Gardens in 1888.

Figure 4. D. spinulosum male
Figure 5. D. spinulosum female
Figure 6. D. spinulosum female cone

Santa Monica, California

These plants are of an unknown age.

Figure 7. D. spinulosum
Figure 8. D. spinulosum
Figure 9. D. spinulosum

Contributed by:

Mike Gray (Figure 1)
Ian Edwards (Figure 2).
Jill Hall (Figure 3).
Colin Wilson (Figure 4,5,6) Dutch Vandervort (Figures 7,8,9).

External Links:

Cycad Pages, IUCN, JSTOR, Trebrown

Google, Google Images, Flickr, PACSOA Forums