Cycads   Dioon rzedowskii

Common Names: Unknown Conservation Status: Vulnerable 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 prefered 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 1. D. rzedowskii Figure 3. D. rzedowskii new leaf detail.

Contributed by:	Mike Gray (Figure 2)
	Dave Weston (Figure 1&3)

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