Spearleaf Rabbitbrush - Lorandersonia linifolia
Chrysothamnus viscidiflorus var. linifolius, Chrysothamnus linifolius
Spreading rabbitbrush is a shrub, up to 2 m (7 ft) high, with erect or ascending branches. The alternate leaves, 1-5 cm long, are narrowly elliptic and straight with entire margins. The bark is whitish and mostly glabrous, and the foliage is glabrous. Numerous flower heads are borne in flat-topped inflorescences on the branch tips. Each head has ca. 4 series of narrow, overlapping involucral bracts, 4-7 mm long, with rounded tips and numerous yellow disk corollas, 4-7 mm long. Ray flowers are lacking. The hairy seeds (achenes) have numerous thin bristles on top (pappus).
Flowering in September.
The glabrous to sparsely hairy twigs combined with straight rather than twisted leaves separate this species from other Chrysothamnus in our area. A hand lens may be needed to determine these characters.
Observations in Montana Natural Heritage Program Database
Number of Observations:
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Map Help and Descriptions
(Observations spanning multiple months or years are excluded from time charts)
Moist alkaline or saline soil along rivers and streams in the valleys and on the plains.
- Additional ReferencesLegend: View Online Publication
Do you know of a citation we're missing?
- Henderson, S. 1997. Effects of fire on avian distributions and patterns of abundance over two vegetation types in southwest Montana : implications for managing fire for biodiversity. M.Sc. Thesis. Bozeman, MT: Montana State University. 95 p.
- Lesica, P., M.T. Lavin, and P.F. Stickney. 2012. Manual of Montana Vascular Plants. Fort Worth, TX: BRIT Press. viii + 771 p.
- Lesica, P., M.T. Lavin, and P.F. Stickney. 2022. Manual of Montana Vascular Plants, Second Edition. Fort Worth, TX: BRIT Press. viii + 779 p.