Does anyone have a Rubens rose that has any thorns? I thought I had identified an unknown, mislabeled rose I got from Rogue Valley Roses (and which they replaced promptly with the right rose) as Rubens. However, I was at Descanso Gardens and inspected their Rubens plant and found not a single thorn, even on the very old wood. My plant has exactly three thorns -- all on very old wood. Does that mean it is not really Rubens?