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Montana Field Guide

Montana Field Guides

Linear-leaved Whitestem Goldenbush - Ericameria discoidea var. linearis
Other Names:  Haplopappus macronema var. linearis, Ericameria linearis

Native Species

Global Rank: G4G5T4
State Rank: S3S4
(see State Rank Reason below)

Agency Status
MNPS Threat Rank:

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State Rank Reason (see State Rank above)
This is the commoner of the two varieties of Haplopappus macronema that occur in Montana. It is reported (Lesica, 2003 communication) to be quite common throughout southwest Montana.
General Description
Stems ascending to erect, 10–40 cm; twigs white-tomentose. Leaves linear, 1–4 cm long, stipitate-glandular, sometimes tomentose, twisted; axillary fascicles sometimes present. Inflorescence cymiform or racemose with 1 to several heads. Involucres obconic, 9–15 mm high; phyllaries subequal, lanceolate, glandular, inner white, outer green. Rays absent. Disk flowers 10–22; corolla 6–10 mm long. Achenes oblong, 5–6 mm long, pubescent. Sagebrush steppe, grasslands, often along roads; montane, rarely lower (Lesica 2012. Manual of Montana Vascular Plants. BRIT Press. Fort Worth, TX).

Flowering in July and August.

Range Comments
Endemic to northwest WY and southwest MT (Lesica 2012. Manual of Montana Vascular Plants. BRIT Press. Fort Worth, TX).

Openings in sagebrush-grasslands in the foothills and montane zones.

The following animal species have been reported as pollinators of this species or genera where their geographic ranges overlap: Bombus bifarius, Bombus centralis, Bombus huntii, and Bombus melanopygus (Williams et al. 2014).

  • Literature Cited AboveLegend:   View Online Publication
    • Williams, P., R. Thorp, L. Richardson, and S. Colla. 2014. Bumble Bees of North America. Princeton, NJ. Princeton University Press.
  • Additional ReferencesLegend:   View Online Publication
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    • Fertig, W. 1996. Status report on Haplopappus macronema Var linearis. Unpublished report to the Bridger-Teton National Forest. Wyoming Natural Diversity Database. 76 pp.
    • Hall, H.M. 1928. The genus Haplopappus, a phylogenetic study in the compositae. Carnegie Institution of Washington Publication No. 389, Washington D.C. 391 pp.
    • Lesica, P. 1992. Vascular plant and sensitive plant species inventory for the Highland Mountains, Deerlodge National Forest. Unpublished report prepared for the Deerlodge National Forest. Montana Natural Heritage Program, Helena, MT. 21 pp. plus appendices, photographs.
    • Lesica, P., M.T. Lavin, and P.F. Stickney. 2012. Manual of Montana Vascular Plants. Fort Worth, TX: BRIT Press. viii + 771 p.
    • Vanderhorst, J.P. and P. Lesica. 1994. Sensitive plant survey in the Tendoy Mountains, Beaverhead County, Montana. Unpublished report to the Bureau of Land Management, Butte District. Montana Natural Heritage Program, Helena, MT. 59 pp. plus appendices.
    • Winkler, G. and C.L. Wambolt. 1991. Range extension, description, and habitat for Haplopappus macronema SSP. Linearis (Asteraceae). Prairie Naturalist 23(2):101-106.
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Citation for data on this website:
Linear-leaved Whitestem Goldenbush — Ericameria discoidea var. linearis.  Montana Field Guide.  .  Retrieved on , from