From "The Complete Book of Roses", Krüssmann, 1981, p. 272, Fig. 144: Comparison of R. nutkana, R. acicularis var. bourgeauiana, R. foliolosa and R. acicularis.
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From "The Complete Book of Roses", Krüssmann, 1981, p. 272, Fig. 144: Comparison of R. nutkana, R. acicularis var. bourgeauiana, R. foliolosa and R. acicularis.