(C.japonica), Cachet Catalogue, 1840-1841, p.1. White. Berlèse, 1840,

Monographie, ed.2, p.78, 225: Shrub vigorous, of a good form and leaves; bud fairly large, a

little elongated; flower about 9.5 cm across, full, white, of the form of ‘Welbancksiana’ (Welbankiana).

Originated in France, from seed by Drouard Gouillon and released in 1839.

Orthographic errors: ‘Drouard Guillon’, ‘Dronard Gouillon’, ‘Grovard Govillon’, ‘Drouard’.

Drouard Guillon. van Houtte Catalogue, 1841, 7:6. Orthographic error for Drouard Gouillon.

Drouetii. van Houtte Catalogue,1851, 44:27. Synonym for Cockii.

Drovard Govillon. Isola Madre Catalogue, 1845. Orthographic error for Drouard Gouillon.