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    Author(s): Susan E. Meyer
    Date: 2008
    Source: 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.
    Publication Series: Agricultural Handbook
    Station: Washington Office
    PDF: Download Publication  (208.0 KB)

    Description

    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.

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    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.

    Keywords

    Penstemon Schmidel, penstemon, beardtongue

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