This section is from the book "Handbook Of Hardy Trees, Shrubs, And Herbaceous Plants", by W. Botting Hemsley. Also available from Amazon: Handbook of hardy trees, shrubs, and herbaceous plants.
A genus of small dwarf trailing hairy herbs with small entire or toothed leaves and rather large purple flowers. In character it is very close to Alys-sum, with the exception of the lateral sepals being saccate at the base. There are about six species known, from the Mediterranean region. Named in honour of a French botanical draughtsman.
1. A. deltoldea (fig. 36). - There are several varieties of this, differing in the size and brilliancy of their flowers from the typical plant. The best one in cultivation is that named Camp-bellii, which is much larger in the flower, and apparently a freer bloomer. A. purpurea, of larger stature, with larger deeper violet flowers, is held by some to be a distinct species, including Campbellii, grandiflora, and Graica. They all flower in Spring.
Fig. 36. Aubrietia deltoidea. (1/3 nat. size.)