It is Orphium frutescens - a native of South Africa. You can find it at Annie's Annuals. http://www.anniesannuals.com/plants/plant_display.asp?prodid=752
Thank you, Marta!
I love Annie's Annuals but mail order shipping to Tennessee is out of the equation! What a wonderful plant and my favorite colors green and pink! Gailclay and limestone via blotanical!
Shame on me for not remembering that I'd seen and photographed this very plant at Hortus Botanicus on a previous visit. It was even labeled. In my defense, it's not something I see in local nurseries.
Wow. Nice photos, good blog. You're also a beauty! I am a landscaper and live on the Mendocino Coast so it's all very familiar! In fact I designed and installed one of these gardens years ago!