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; and soon every family was planting yellow corn. i think that seed of other varieties of corn, and of beans, squashes, and sunflowers, were gotten of the mandans afterwards; but there is no story telling of this, that i know. i do not know when my people stopped planting ground beans and wild potatoes...
spore release, as in non-seed plants. a current example of how this might have happened can be seen in the precocious spore germination in selaginella , the spike-moss. the result for the ancestors of angiosperms was enclosing them in a case, the seed. the apparently sudden appearance of nearly modern...