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This name should now be used in place of C. oxyacantha L., which has been rejected as ambiguous. Even if it had been maintained it would have had to be applied to C. curvisepala Lindman, a species mainly of north-west and central Europe, not occurring in Britain. See further the paper by Jean Byatt in the Botanical Journal of the Linnean Society, Vol. 69, pp. 15-20 (1974).