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Montana Field Guide

Montana Field Guides

Sneezeweed - Achillea ptarmica
Other Names:  Sneezewort Yarrow

Exotic Species (not native to Montana)

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).

Habitat

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