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Treesearch

Penstemon Schmidel: penstemon, beardtongue

Informally Refereed
Download (PDF 213 KB): https://research.fs.usda.gov/download/treesearch/32654.pdf

Abstract

The genus Penstemon comprises about 230 species of perennial herbs and subshrubs, most of which are found in western North America. Although most of the species are herbaceous, there are many more subshrubby species than are treated here. Several shrubby species from California that were formerly included in the genus Penstemon have been transferred to the closely related genus Keckiella Straw. In the previous edition of the Seed Manual, Hylton (1974) treated these species under the name Penstemon.

Parent Publication

Citation

Meyer, Susan E. 2008. Penstemon Schmidel: penstemon, beardtongue. In: Bonner, Franklin T.; Karrfalt, Robert P., eds. The Woody Plant Seed Manual. Agric. Handbook No. 727. Washington, DC. U.S. Department of Agriculture, Forest Service. p. 774-777.