giant chalk Dudleya
A Baja California native. Useful and very dramatic in containers or well-drained rock gardens. Likes a protected and sunny microclimate where cold air and winter wet can drain away. Enjoys a little afternoon shade in hotter climates. Develops up to 1 1/2 ft. wide rosettes with fleshy chalk-covered leaves. Yellow flowers sit atop tall stalks in late spring and early summer.