Abstract
Evidence now being brought in the form of identifications of fruits, seeds and pollen grains from sites which are known with fair certainty to have been formed in the late glacial or early post-glacial time, goes a long way toward the solution of per-glacial survival of plant spp. By establishing the existence over a wide range of territory of spp. today restricted in area, we define our problem as essentially one of post-glacial movements and adjustments, rather than of per-glacial survival.

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