[图书][B] Upper Paleozoic floral zones and floral provinces of the United States
The Permian of the Southwestern United States contains three floral zones, the lowermost
characterized by Callipteris spp. This underlies a zone containing three contemporaneous
but geographically restricted floras whose provinciality may be due to paleophysiographic or
paleoedaphic features of that region These are the Supaia flora of Arizona and New Mexico,
the Glenopteris flora of Kansas and the Gigantopteris flora of Texas, Oklahoma, and New
Mexico. The third and youngest zone, containing a modified Gigantopteris flora, is known …
characterized by Callipteris spp. This underlies a zone containing three contemporaneous
but geographically restricted floras whose provinciality may be due to paleophysiographic or
paleoedaphic features of that region These are the Supaia flora of Arizona and New Mexico,
the Glenopteris flora of Kansas and the Gigantopteris flora of Texas, Oklahoma, and New
Mexico. The third and youngest zone, containing a modified Gigantopteris flora, is known …
The Permian of the Southwestern United States contains three floral zones, the lowermost characterized by Callipteris spp. This underlies a zone containing three contemporaneous but geographically restricted floras whose provinciality may be due to paleophysiographic or paleoedaphic features of that region These are the Supaia flora of Arizona and New Mexico, the Glenopteris flora of Kansas and the Gigantopteris flora of Texas, Oklahoma, and New Mexico. The third and youngest zone, containing a modified Gigantopteris flora, is known only in a restricted area in northwest Texas.
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