This is called an
H. kikutii yakusimensis-type plant
which was registered by
Peter Ruh of Ohio in 1990 on behalf of
George Schenk. The medium size plant has green foliage and bears pale
lavender flowers in clusters from late August into September.
wonder if this is a play on words about Noel Coward's play
and later, movie, "Blithe Spirit".