Unfortunately the Chelsea Physic Garden's signage is incorrect. Just found with the help of a Google book that I have in my collection called The Encyclopedia of Herbs by Arthur O. Tucker and Thomas DeBaggio. It's all online! OK, here goes 'Rober's Lemon Rose' is a hybrid of P. graveolens x P. tomentosum that came from Ernest Rober in California in the 1940's. 'Velvet Rose' was isolated from 'Rober's Lemon Rose' tissue culture line by Robert Skirvin at Purdue University in 1975. So maybe the Chelsea thought that Rober's Lemon Rose was developed by Robert Skirvin instead of Ernest Rober. I guess I'll just have to let them know the next time I'm there! You know I will! The quote for the day comes from Mrs. Reppert's TwelveMonth Herbal:
Many gardens grew within monastery
walls, but most important were the physic
garden near the infirmary and the kitchen
garden near the gardener's cottage.
-- Rosetta E. Clarkson, Magic Gardens