White Cudweed - Gnaphalium microcephalum
Pseudognaphalium canescens, Pseudognaphalium thermale, Gnaphalium thermale
MNPS Threat Rank
Short-lived taprooted perennial. Stems erect, often branched at the base, 20–70 cm. Leaves 3–8 cm long; basal petiolate, oblanceolate; cauline linear-oblanceolate, sessile, decurrent on the stem. Glomerules terminal in an open ovoid to pyramidal inflorescence, surpassing subtending leaves. Involucres 5–6 mm high; phyllaries white, with acute tips, sometimes tomentose at the base. Inner corollas 3–4 mm long. Achenes 0.5–1 mm long; pappus deciduous separately (Lesica 2012. Manual of Montana Vascular Plants. BRIT Press. Fort Worth, TX)
Ours is variety thermale (E.E. Nelson) Cronquist
BC, AB south to CA, NV, UT and WY (Lesica 2012. Manual of Montana Vascular Plants. BRIT Press. Fort Worth, TX).
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)
Disturbed soil of roadsides, grasslands, meadows, open forest, locally common following timber harvest; valleys (Lesica 2012. Manual of Montana Vascular Plants. BRIT Press. Fort Worth, TX)
- Additional ReferencesLegend: View Online Publication
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- Lesica, P., M.T. Lavin, and P.F. Stickney. 2012. Manual of Montana Vascular Plants. Fort Worth, TX: BRIT Press. viii + 771 p.
- Simanonok, M. 2018. Plant-pollinator network assembly after wildfire. Ph.D. Dissertation. Bozeman, MT: Montana State University. 123 p.