As a rule, there aren't many of the Mediterranean rock roses that will thrive in our humid, moist climate, so when we find one, we get quite excited. Such is the case with Cistus 'Harper's White' that we obtained from legendary Virginia garden writer, Pamela Harper, in 2007. Pam obtained it, first in 1972, as Cistus x corbariensis and again in 1991 as Cistus x hybridus. Unfortunately, the plant doesn't match either name. For us Cistus 'Harper's White' has formed a 3.5' tall x 7' wide evergreen bush with thick, dark green leaves which are complemented in April and May with clusters of rose-like flowers of pure white. If you've been looking for a plant that thrives in heat and drought, look no further.