Within the Cornus alba article...


'Sibirica'

Not so rampant a grower as the type, the branches of a paler and brighter red; fruit bluish; leaves mostly more rounded and more shortly acuminate at the apex. The plants that correctly bear this name were put into commerce by Loddiges as “Cornus sibirica” and described by Loudon under the name C. alba var. sibirica. Unfortunately, some nineteenth-century botanists, believing that the C. alba of Linnaeus was the American red osier dogwood (properly C. stolonifera), used the name C. alba var. sibirica for the Siberian dogwood in general, which may explain why some of the plants in commerce as C. alba sibirica are typical C. alba and not the true ‘Sibirica’.The plants grown as “Westonbirt”, “the Westonbirt dogwood” or atrosanguinea do not, judging from the trials at Wisley, differ in any way from the true ‘Sibirica’. It is at present represented at Westonbirt only by a few plants in the home nursery; the common dogwood there is ordinary C. alba.’Sibirica’, being of rather weak constitution, should be grown in a damp, well-cultivated soil. The bark is most brightly coloured on the previous summer’s growths and gradually darkens as spring approaches.

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