All-Hydrangea Taxa excluding H. macrophylla

List compiled by Peter R Smith and updated January 2010 Please note: This list is a working document and may contain errors.  An asterix after the name indicates taxa that we have been unable to locate in any gardens or nurseries and we fear many of these taxa may already be lost from cultivation HOW YOU CAN HELP US TO IMPROVE THIS LIST We would be very pleased if you could:

  • Let us know if you notice any errors in the list.
  • Let us know if you grow any of the asterix marked plants in your garden or nursery or know where they are grown, (If you could donate a spare plant that would be fantastic!)
  • Supply us with a short description for any taxa currently lacking a description or with only a very brief description.
arborescens subsp. radiata (Walt.)
Name means; With radiating parts With flat heads of fertile flowers surrounded by large... Read more
arborescens subsp. radiata ‘Terry Greer’ *
Michael Dirr, hydrangeas forAmericanGardens:  A cultivar with mostly sterile florets and similar to ‘Grandiflora’... Read more
arborescens subsp. radiata ‘White Dome’ ® De Belder (Kromhout, Woulter (Leersum, NL)
Syn. ‘Dardom’ A distinct cultivar characterized by its large and vigorous growth habit; upright... Read more
aspera ‘Anthony Bulivant’
An extremely beautiful form with domed heads of fertile flowers with long bright blue... Read more
aspera (D.Don.)
Name means Rough = Leaf surface) Gardens found in the 28 pre 2000 surveyed:  ... Read more
aspera ‘Macrophylla’ strigosa group (of gardens not Hemsl.)
Name means; With large leaves)  AGM 1984, 1992. An exceptionally large-leaved form Gardens found... Read more
aspera ‘Mauvette’ ( c1983)
Flowers in rounded, bunched heads, with deep mauve fertile florets, blue stamens, surrounded by... Read more
aspera ‘Taiwan’
May be Syn. with:  ‘Maurice Mason ‘ Gardens found in the 28 pre 2000... Read more
aspera ‘Trelissick Blue Skies’
Listed in the RHS database (may be the same as ‘Trelissick Pink Cloud?) Read more