Ferns are usually thought of as plants of moist, humid regions, and at first glance the Trans-Pecos region of Texas, a rugged portion of the arid Chihuahuan Desert, does not appear to be a likely location for ferns and their relatives. Yet in many seemingly unsuitable dry habitats, on shadowed slopes, in canyons, and near springs, seeps, and streams can be found sixty-four species of ferns and fourteen species of fern allies. This book is a complete...
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Nature