Eldren Minks of Minnesota registered this
hybrid of H. 'Crested
Reef' × H. 'Candle Wax' in 1980. It forms
a medium to large size mound of dark green foliage whose leaves are
corrugated and moderately wavy. Very pale lavender flowers bloom
from late June into July.
The Hostapedia by Mark Zilis (2009), "I'm not sure how 'Green Dome' got its name, because
individual leaves are not dome-like."