Ostergruss *  (Haller 1968)

Otaksa (H) (Siebold) Japan

One of the original ancestors to many macrophylla cultivars.  It is named after a beautiful Japanese girl who Siebold  called ‘Otakusa’ but whose real mane was Taki Kusumoto.  They lived together, but they were not allowed to marry as mixed marriages were forbidden...
Ostergruss *  (Haller 1968)

Otaska Montruosa (H) Siebold 1909

Bred from ‘Otaksa’ by Siebold.  This cultivar has much larger flowers than its parent, and was used to continue the line of large flowered Mopheaded Hydrangea cultivars. Gardens found in 28 pre 2000 surveys MS UK  Plant Finder 2012: Not...
Ostergruss *  (Haller 1968)

Otsu hime (L)

This is probably a serrata cultivar! With blue fertile florets surrounded by small star-like pale blue sterile florets Gardens found in 28 pre 2000 surveys DA  WAA Gardens found in the 10 surveyed in 2010: DA (MP ESV AW UK  Plant Finder 2012: Not...