Abstract
WHEN we turn to consider wild plants in Nature, two lines of inquiry present themselves: (1) the comparison of the number of plant species in warm mountain and lowland regions, and (2) the question of endemic species.
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Thomas, H. Cosmic Rays and the Origin of Species*. Nature 137, 97–98 (1936). https://doi.org/10.1038/137097a0
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DOI: https://doi.org/10.1038/137097a0