Abstract
MAY not Dr. Heslop Harrison's experiences of primulas (NATURE, May 19, p. 359) be due to the influence of cold and somewhat resemble what is seen in our so-called copper-beech in the spring and early summer? Few seem to be aware that during the summer its characteristic colour entirely disappears and it then has the ordinary green foliage. Other plants, too, e.g. some varieties of roses, show the same sensitiveness.
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ABBOTT, G. The Colours of Primroses. Nature 107, 395 (1921). https://doi.org/10.1038/107395e0
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DOI: https://doi.org/10.1038/107395e0
