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Montana Field Guide

Montana Field Guides

Common Yarrow - Achillea millefolium
Other Names:  Achillea lanulosa


Global Rank: G5
State Rank: S5
* (see State Rank Reason below)

Agency Status
USFWS:
USFS:
BLM:
MNPS Threat Rank:
C-value: 3

External Links






State Rank Reason (see State Rank above)
Abundant and widespread across Montana in various habitats. Also tolerant of disturbance.
 
General Description
Stems ascending to erect, simple, 6–60 cm. Herbage sparsely- to tangled-wooly. Leaves basal and cauline, petiolate below; blades narrowly oblanceolate, 1–15 cm long, finely, 3 times pinnately dissected; ultimate lobes 1–2 × 1 mm. Inflorescence hemispheric 2–15 cm across with numerous heads. Involucre 3–5 × 2–4 mm; bracts in 3 series; outer bracts green with brown, fimbriate margins, sparsely glandular. Rays 5 to 12, white (rarely pink); ligules 2–3 mm long, not quite as wide. Disk flowers white,10 to 30; corolla 2–5 mm long. Achenes glabrous, 1–2 mm long, obscurely winged (Lesica 2012. Manual of Montana Vascular Plants. BRIT Press. Fort Worth, TX).

Species Range
Present
 


Range Comments
Circumboreal and throughout temperate N. America (Lesica 2012. Manual of Montana Vascular Plants. BRIT Press. Fort Worth, TX).

Summary of Observations Submitted for Montana
Number of Observations: 996

(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
Grasslands, meadows, sagebrush steppe, open forest, talus, fellfields; all elevations (Lesica 2012. Manual of Montana Vascular Plants. BRIT Press. Fort Worth, TX).

References
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Citation for data on this website:
Common Yarrow — Achillea millefolium.  Montana Field Guide.  .  Retrieved on , from