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    • Journal of Range Management, Volume 44 (1991)
    • Journal of Range Management, Volume 44, Number 4 (July 1991)
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    Xeric big sagebrush, a new subspecies in the Artemisia tridentata complex

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    Author
    Rosentreter, R.
    Kelsey, R. G.
    Issue Date
    1991-07-01
    Keywords
    taxonomy
    plant extracts
    fluorescence
    chemotaxonomy
    phenols
    new subspecies
    artemisia tridentata subsp. xericensis
    leaves
    habitats
    plant morphology
    plant ecology
    Idaho
    tannins
    terpenoids
    Artemisia tridentata
    geographical distribution
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    Citation
    Rosentreter, R., & Kelsey, R. G. (1991). Xeric big sagebrush, a new subspecies in the Artemisia tridentata complex. Journal of Range Management, 44(4), 330-335.
    Publisher
    Society for Range Management
    Journal
    Journal of Range Management
    URI
    http://hdl.handle.net/10150/644813
    DOI
    10.2307/4002394
    Additional Links
    https://rangelands.org/
    Abstract
    In 1970 a xeric form of mountain big sagebrush (Artemisia tridentata ssp. vaseyana (Rydb.) Beetle) was reported in west central Idaho. Observations of morphology, habitat, and ecology, and analyses of foliage chemical components, clearly indicate these plants represent a new subspecies (xericensis) in the big sagebrush complex. It grows at lower elevations, 762-1,524 m (2,500-5,000 ft) and drier environments, 305-560 mm (12-22 in) precipitation, than most mountain big sagebrush, and is found on basaitic foothill soils often in association with bluebunch wheatgrass (Agropyron spicatum (Pursh) Scribn. & Smith). In addition to soil type, the radiate growth form and a more branched paniculate inflorescence are 2 morphological characteristics useful in separating ssp. xericensis from ssp. vaseyana. It contains higher concentrations of crude protein (10.4%), phosphorus (0.3%), and total volatiles, and lower concentrations of tannins and total phenols than mountain big sagebrush. Distinct chromatograms were obtained for both subspecies when extracts were analyzed by gas and high performance liquid chromatography. Leaf morphology and fluorescence of leaf water extracts are useful characters for separating ssp. xericensis from ssp. tridentata. The chemical data, in combination with morphology and ecology, suggest this new subspecies was initially derived by hybridization of ssp. tridentata and ssp. vaseyana.
    Type
    text
    Article
    Language
    en
    ISSN
    0022-409X
    ae974a485f413a2113503eed53cd6c53
    10.2307/4002394
    Scopus Count
    Collections
    Journal of Range Management, Volume 44, Number 4 (July 1991)

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