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White Cudweed - Gnaphalium microcephalum
Other Names:
Pseudognaphalium canescens, Pseudognaphalium thermale, Gnaphalium thermale
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Native Species Global Rank :
G5
State Rank :
SNR
C-value :
Agency Status USFWS :
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General Description
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 et al. 2012. Manual of Montana Vascular Plants. BRIT Press. Fort Worth, TX ).
Diagnostic Characteristics
Ours is variety thermale (E.E. Nelson) Cronquist
Range Comments
BC, AB south to CA, NV, UT and WY (Lesica et al. 2012. Manual of Montana Vascular Plants. BRIT Press. Fort Worth, TX ).
Observations in Montana Natural Heritage Program Database
Number of Observations: 14
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Relative Density
Recency
(Observations spanning multiple months or years are excluded from time charts)
Habitat
Disturbed soil of roadsides, grasslands, meadows, open forest, locally common following timber harvest; valleys (
Lesica et al. 2012. Manual of Montana Vascular Plants. BRIT Press. Fort Worth, TX ).
References
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