This section is from the book "The Gardener V1", by William Thomson. Also available from Amazon: The New Organic Grower: A Master's Manual of Tools and Techniques for the Home and Market Gardener.
The tiny evergreen known to cultivators as B. erectus is a hybrid, obtained many years ago by the late Mr James Cunningham of the Comely Bank Nurseries, Edinburgh, the parents being Menziesia caerulea and Rhododendron chamoecistus, and we think would be more properly called Menziesia, to which genus it really belongs, and with which it has so many characters in common.
Under whatever name it may be known, however, it is unquestionably one of the prettiest of our dwarf peat-soil shrubs, and ought to find a place in every collection.
It forms a neat compact bush about 6 inches high, and flowers profusely about June, the whole surface of the plant being covered with its large bright-pink Kalmia-like flowers, which, being of a thick waxy substance, remain a long time in perfection. Like its parents, it is perfectly hardy, and though preferring a shady situation, grows and flowers freely in the ordinary peat-beds when properly drained, and is an excellent rockwork-plant, where it should have abundance of sandy peat, which in planting should be firmly pressed round the ball, and receive a good soaking of water once or twice in very dry seasons.