Jepson Manual Geographic Subdivision Boundary Changes For the Klamath and Cascade Ranges of Northwestern California and Implications For Regional Floristics
2016
Abstract When The Jepson Manual: Higher plants of California was published in 1993, its Geographic Subdivisions of California map included an area of Klamath Ranges geology in its Cascade Ranges subdivision, creating an anomaly with floristic ramifications. We aim to correct that anomaly in this paper. This incorrect designation leads to several issues, including ecologic and geologic inconsistences, and problematic results when conducting floristic analysis in the eastern Klamath Ranges. Botanical field surveys for several recent projects in the eastern Klamath Ranges, newly available digitized data made available online by the Consortium of California Herbaria, and several new taxa recently published from the eastern Klamath Ranges provided means and rationale to make much-needed changes to the Klamath Ranges boundary. Using personal experience, existing ecologic and geologic references, and GIS analysis we revised the Klamath and Cascade Ranges boundaries, provided geographic range updates for over 230...
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