Dioon rzedowskii

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Figure 1. D. rzedowskii

Distribution & Habitat:

Found in exposed leaf litter filled clefts in limestone cliffs around Oaxaca, Mexico.

Description:

A medium to large cycad up to 5m tall, with light/bright green, leathery leaves.

Culture:

Sunny, moist, but well drained position. Renowned for being the most acid tolerant Dioon, and hence the preferred plant for people with acid soil. (This does seem a bit odd, given its habitat, and I've also had no problems with D. spinulosum in my garden, which has a very acid soil.)

Figure 2. D. rzedowskii old leaf detail.

Figure 3. D. rzedowskii new leaf detail.

Contributed by:

Mike Gray (Figure 2)
Dave Weston (Figure 1&3)

External Links:

Cycad Pages, IUCN, JSTOR, Trebrown

Google, GoogleImages, Flickr,