The following bibliography has been generated by bringing together all references provided by our content partners. There may be duplication.
* Jepson Manual. 1993. Achillea University of California, Berkeley, California, USA
- Clapham, A.R., Tutin, T.G. & Warburg, E.F. (1952) Flora of the British Isles. 1st edition. Cambridge University Press, Cambridge
To request an improvement, please leave a comment on the page. Thank you!