Anacyclus pyrethrum var. depressus, I got one cheap from the supermarket recently but it doesn't yet have flowers!
http://www.deeproot.co.uk/pbo/...
There was another with more sivery foliage which had a cultivar name but I don't remember what that was.. could have been this one but it doesn't sound familiar ..Anacyclus pyrethrum var. depressus compactum 'Silver Cushion'
http://www.riverbendnursery.co...
http://www.gatewaygardens.com/...