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Sempervivum calcareum 'Grigg's Surprise'
Sempervivum calcareum 'Grigg's Surprise' (aka S. calcareum 'Monstrosum'): A rare monstrose cultivar for the collector. Instead of the normal flat-leaved rosette, this variety grows as a mass of long, slender quills. The leaves are blue-green and tipped in deep burgundy. This hard...
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