The plant above was mislabeled as 'Sun Disc'.
Seaver of Massachusetts registered this
seedling of H. 'Sea Lotus Leaf' in 2004. It has
H. 'Sieboldiana' like foliage which is ovate shaped, heavily
corrugated, cupped and with thick substance. The near white
flowers bloom in dense clusters starting in mid-June.
Similar cultivars include H. 'Golden Sunburst'.