striking Euphorbia rigida cuttings?

Hi folks -

In my neighborhood, there is a plant of Euphorbia rigida that is really unusual:
http://www.flickr.com/photos/hortulus_aptus/2213493392/in/pool-medit-garden
The leaves are very lightly packed and arranged in a spiral fashion, some
growing one way, some another.  The owner has agreed that I could take some
cuttings, but I can't recall striking cuttings from this type of Euphorbia
before.  Is there something special you need to do with latex sapped plants
such as this?  Does anyone have experience rooting cuttings from this species?
 Would layering be better? (or would it even work?).  As you can see, the
plant is coming into flower, so I may have a chance at obtaining some seeds
(which may or may not come true).  Before I impose upon this person's
generosity, I thought I'd try and maximize my success.

Seán A. O'Hara
sean(at)gimcw.org
www.hortulusaptus.com
(ask about mediterranean climate gardening forum)
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