. Bio-ecology. Plant ecology; Animal ecology; Botany; Ecology; Zoology. 286 THE XORTH AMERICAN GRASSLAND fornia well into Lower California were once grassland, as attested by numerous relicts of the perennial dominants (Fig. 68). Climate. The climate of this prairie differs from all those previ- ously considered in having a winter rainfall, the maximum occurring in December, January, and February. It is reflected in the two grow- ing seasons of the desert plains, the winter season being the counter- part of the single growing season in California. Except in the neigh-. FiG. 68.—California prai
. Bio-ecology. Plant ecology; Animal ecology; Botany; Ecology; Zoology. 286 THE XORTH AMERICAN GRASSLAND fornia well into Lower California were once grassland, as attested by numerous relicts of the perennial dominants (Fig. 68). Climate. The climate of this prairie differs from all those previ- ously considered in having a winter rainfall, the maximum occurring in December, January, and February. It is reflected in the two grow- ing seasons of the desert plains, the winter season being the counter- part of the single growing season in California. Except in the neigh-. FiG. 68.—California prairie composed of Si/pa pulchra; San Joaquin Vallej-. (Plioto by Edith Clements.) borhood of the coast, the summers are hot, as in all southern grass- lands, and the winters are mild, with little or no snow within the range of this association. The annual rainfall varies from about 6 inches in the upper San Joaciuin and in the Antelope Valley at the west end of the Mohave Desert, to 25-30 inches along the coast. In view of the fact that most of the grassland climax receives 70 per cent of the precipitation be- tween Ai)ril first and October first, it has sometimes been doubted whether the climate of California is favorable to such a climax, espe- cially with the low minimum indicated above. However, the exten-. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original Clements, Frederic E. (Frederic Edward), 1874-1945; Shelford, Victor E. (Victor Ernest), b. 1877. New York, J. Wiley & Sons, inc. ; London, Chapman & Hall, limited
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Keywords: ., bookcentury1900, booksubje, booksubjectbotany, booksubjectzoology
