. Carnegie Institution of Washington publication. Fillmore, Utah 15 in. 11. Fig. 5.—Monthly and total rainfall for representative localities in the Basin sage- brush association. With respect to the component species, the unity of the climax is proved by such widely ranging dominants as Artemisia tridentata, Chrysothamnus nauseosus, Atriplex confertifolia, A. canescens, Gutierrezia sarothrae, and Eurotia lanata. Of the 17 dominants, only 4 fail to occur throughout the central mass of the formation as indicated by the limits of the Great Basin. As to origin, the formation is characteristically
. Carnegie Institution of Washington publication. Fillmore, Utah 15 in. 11. Fig. 5.—Monthly and total rainfall for representative localities in the Basin sage- brush association. With respect to the component species, the unity of the climax is proved by such widely ranging dominants as Artemisia tridentata, Chrysothamnus nauseosus, Atriplex confertifolia, A. canescens, Gutierrezia sarothrae, and Eurotia lanata. Of the 17 dominants, only 4 fail to occur throughout the central mass of the formation as indicated by the limits of the Great Basin. As to origin, the formation is characteristically southwestern. The main body of dominants, which constitute the Atriplex-Artemisia association of the Great Basin, seem to have moved northward at an early period, perhaps before the Pleistocene, though they have probably undergone considerable differentiation since that time. A more recent lateral development has pro- duced the Salvia-Artemisia association of southern California and Lower California. The latter found itself between the chaparral on the one hand and the rapidly desiccating desert on the other, and has covered but a limited area in comparison with the main association. Its relationship, however, is clearly indicated by its frequent contact with Artemisia tridentata, and espe- cially by its occupying the same position between the desert scrub or grass- land and the chaparral formations that the Atriplex-Artemisia association does. The floristic unity of the formation is conclusively indicated by the. 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 Carnegie Institution of Washington. Washington, Carnegie Institution of Washington
Size: 2079px × 1202px
Photo credit: © Book Worm / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookauthorcarnegie, bookcentury1900, bookdecade1920, bookyear1920
