Nash T.H.III. & Moser T.J.
(1982):
Vegetational and physiological paterns of lichens in North American deserts,
Journal of the Hattori Botanical Laboratory,
53: 331-336
The desert regions of North America lie in the arid regions of the West where annual precipitation is generally less than 250 mm. On the basis of higher plant floristic, geographic, geologic and climatic differences, four major desert regions are usually recognized: the Chihuahuan, Sonoran, Mohave and Great Basin Deserts (Jaeger, 1957;Shreve, 1951). The first three are frequently referred to as “hot deserts”, Because of their geographic position within a few degrees of 30°N, summers are generally …
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