David's Kootenay: provenance Rumsey or Brundrett 1958. I'm assuming this is the one that John et al took budwood from 2 or 3 years ago, and sent plants descended from it to Newtown Park and Saumarez House. I don't know whether the one Kurinda Nursery sells, or the one at Maddingley Park, are that one or John's older stock.
