Alpina Group

'Comtesse de Bouchaud'

C. fargesii

'Hagley Hybrid'

Macropetala Group

'Mrs Cholmondeley'

'Nelly Moser'

'Perle d'Azur'

'Victoria'

Viticella Group

See: Howells, J. 1996. The Rose and The Clematis as Good Companions. P.143

John Howells' Work on Stem Rot (Clematis Wilt)

Howells' Gardeners' Classification of Clematis

Pruning the Twelve Groups of Clematis

Round the Year Care of Clematis

Five Ways of Combining Roses and Clematis

Twelve Easy Combinations of Roses and Clematis

Exploding Myths About Clematis

Pronouncing Clematis

A Brief History of Clematis