917. corethrogyne filaginifolia
2019
Hind, Nicholas
Corethrogyne filaginifolia (Hook. & Arn.) Nutt. (Compositae: Astereae: Machaerantherinae) is illustrated and described. The full synonymy of this monospecific North American genus is provided together with the location of known type material and relevant comments made where applicable. The Conservation Status of the species is considered LC (Least Concern), as previous listings in California are shown to refer to Corethrogyne filaginifolia (Hook. & Arn.) var. incana (Lindl.) D.R. Morgan & R.L. Hartman, which is now considered a synonym of the rather variable Dieteria canescens (Pursh) Nutt. The taxonomic placement of Diplopappus incanus Lindl. is discussed, and a synonymy has been provided for Dieteria canescens subsp. canescens var. incana (Lindl.) D.R. Morgan & R.L. Hartman, of which it is the basionym. The location of the probable holotype of Diplopappus leucophyllus Lindl. ex DC. is discussed, together with the relevance of material mounted on a Kew sheet.
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