Skip to Main Content
U.S. Forest Service
Caring for the land and serving people

United States Department of Agriculture

Home > Search > Publication Information

  1. Share via EmailShare on FacebookShare on LinkedInShare on Twitter
    Dislike this pubLike this pub
    Author(s): J. L. Anderson; S. Richmond-Williams; O. Williams
    Date: 2007
    Source: In: Barlow-Irick, P.; Anderson, J.; McDonald, C., tech eds. Southwestern rare and endangered plants: Proceedings of the Fourth Conference; March 22-26, 2004; Las Cruces, New Mexico. Proceedings. RMRS-P-48CD. Fort Collins, CO: U.S. Department of Agriculture, Forest Service, Rocky Mountain Research Station. p. 8-15
    Publication Series: Proceedings (P)
    Station: Rocky Mountain Research Station
    PDF: View PDF  (1.27 MB)

    Description

    The red-flowered member of Penstemon sect. Chamaeleon from southeastern Arizona and southwestern New Mexico has been treated taxonomically both as part of the Mexican species, P. lanceolatus Benth., and as a separate species, P. ramosus Crosswhite. Under the former treatment the Arizona and New Mexico populations are peripheral populations of a primarily Mexican species; and, under the latter they represent an endemic species restricted to this area. Penstemon ramosus was distinguished from P. lanceolatus by branching below the inflorescence and by having narrow, revolute leaves. Morphological examination of herbarium specimens from Arizona, New Mexico, Texas, and Mexico, including duplicates of paratypes cited in the original publication of P. ramosus, and of field material in Arizona and New Mexico showed no consistent differences in these characters throughout the entire range. Therefore, Penstemon ramosus should be synonymized under P. lanceolatus, and Arizona and New Mexico plants that have been distinguished as P. ramosus should be treated as peripherals of P. lanceolatus.

    Publication Notes

    • You may send email to rmrspubrequest@fs.fed.us to request a hard copy of this publication.
    • (Please specify exactly which publication you are requesting and your mailing address.)
    • We recommend that you also print this page and attach it to the printout of the article, to retain the full citation information.
    • This article was written and prepared by U.S. Government employees on official time, and is therefore in the public domain.

    Citation

    Anderson, J. L.; Richmond-Williams, S.; Williams, O. 2007. Penstemon lanceolatus Benth. or P. ramosus Crosswhite in Arizona and New Mexico, a peripheral or endemic species? In: Barlow-Irick, P.; Anderson, J.; McDonald, C., tech eds. Southwestern rare and endangered plants: Proceedings of the Fourth Conference; March 22-26, 2004; Las Cruces, New Mexico. Proceedings. RMRS-P-48CD. Fort Collins, CO: U.S. Department of Agriculture, Forest Service, Rocky Mountain Research Station. p. 8-15

    Keywords

    plant conservation, Chamaeleon, Penstemon lanceolatus Benth., P. ramosus Crosswhite

    Related Search


    XML: View XML
Show More
Show Fewer
Jump to Top of Page
https://www.fs.usda.gov/treesearch/pubs/29582