Achillea tomentosa, commonly known as woolly yarrow, is a flowering plant in the family Asteraceae. It is sometimes kept as a garden plant, and occasionally naturalizes outside its original range of dry lowland habitats of southern Europe and (possibly) western Asia. It is a recipient of the RHS's Award of Garden Merit.[2]

Description

Achillea tomentosa is quite similar in appearance to common yarrow Achillea millefolium, but typically has yellow ligules, more numerous disc florets, and straw‑colored involucral bracts with translucent margins.[3] Also, A. tomentosa is diploid, unlike the polyploid common yarrows.[4]

  • Achillea tomentosa foliage
    Achillea tomentosa foliage

Notes

  1. ^ Achillea tomentosa Pursh is a synonym of Achillea millefolium var. occidentalis DC.

References

  1. ^ Sp. Pl. 2: 897 (1753)
  2. ^ "Achillea tomentosa woolly yarrow". RHS. Retrieved 15 August 2019.
  3. ^ Ian R. Thompson (2007). "A taxonomic treatment of tribe Anthemideae (Asteraceae) in Australia" (PDF). Muelleria. 25: 21–58. doi:10.5962/P.292234. ISSN 0077-1813. Wikidata Q103967080.
  4. ^ Vetter, Stefan; Lambrou, Maria; Franz, Chlodwig; Ehrendorfer, Friedrich (1996). "Cytogenetics of experimental hybrids within the Achillea millefolium polyploid complex (yarrow)". Caryologia. 49 (1): 1–12. doi:10.1080/00087114.1996.10797344.