Crug Farm Plants say:  “Our introduction of this slow growing species into cultivation after many years of searching. Slowly forming a large shrub with pinnately-lobed, green hairy leaves. From July the white flower are borne in large flat-topped cymes with neutral marginal flowers. Part shade and acid-neutral soil, height and spread 2-3m. This collection is from the high mountain Tawara-Yama in central Kyushu, Japan collected in 2006.”

Gardens found in the 10 surveyed in 2010: ESV

UK Plant Finder 2012 = 5 Nurseries