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Montana Field Guide

Montana Field Guides

White Cudweed - Gnaphalium microcephalum
Other Names:  Pseudognaphalium canescens, Pseudognaphalium thermale, Gnaphalium thermale


Global Rank: G5
State Rank: SNR

Agency Status
USFWS:
USFS:
BLM:
MNPS Threat Rank:
C-value:

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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 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 2012. Manual of Montana Vascular Plants. BRIT Press. Fort Worth, TX).

Habitat
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).

References
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Citation for data on this website:
White Cudweed — Gnaphalium microcephalum.  Montana Field Guide.  .  Retrieved on , from