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Montana Field Guide

Montana Field Guides

Sneezeweed - Achillea ptarmica
Other Names:  Sneezewort Yarrow, Wild Pellitory, False Sneezewort

Non-native Species

Global Rank: GNR
State Rank: SNA

Agency Status
USFWS:
USFS:
BLM:
MNPS Threat Rank:
C-value: 1

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General Description
Stems erect, branched above, angled, 30–60 cm. Herbage glabrous below, pubescent above. Leaves cauline, sessile; blades linear-lanceolate, 3–10 cm long, serrulate. Inflorescence leafy-bracteate, of few heads. Involucre 4–6 × 4–8 mm; bracts in 3 series; outer bracts villous, green with brown margins. Rays white, 8 to 10; ligules 4–5 mm long and wide. Disk flowers white,10–30; corolla ca. 3 mm long. Achenes 1–2 mm long (Lesica 2012. Manual of Montana Vascular Plants. BRIT Press. Fort Worth, TX).

Range Comments
Introduced across northern U.S. and adjacent Canada; native to Eurasia. Collected in Flathead County (Lesica 2012. Manual of Montana Vascular Plants. BRIT Press. Fort Worth, TX).

Observations in Montana Natural Heritage Program Database
Number of Observations: 2

(Click on the following maps and charts to see full sized version) Map Help and Descriptions
Relative Density

Recency

 

(Observations spanning multiple months or years are excluded from time charts)



Habitat

References
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Citation for data on this website:
Sneezeweed — Achillea ptarmica.  Montana Field Guide.  .  Retrieved on , from