Artemisia matricarioides auct.
Matricaria discoidea, commonly known as pineappleweed, wild chamomile, disc mayweed, and rayless mayweed, is an annual plant native to northeast Asia where it grows as a common herb of fields, gardens, and roadsides. It is in the family Asteraceae. The flowers exude a chamomile/pineapple aroma when crushed. They are edible and have been used in salads (although they may become bitter by the time the plant blooms) and to make herbal tea. Pineappleweed has been used for medicinal purposes, including for relief of gastrointestinal upset, infected sores, fevers, and postpartum anemia.
The flower head is cone-shaped, composed of densely packed yellowish-green corollas, and lacking ray-florets. The leaves are pinnately dissected and sweet-scented when crushed. The plant grows 2 to 16 in (5.1 to 40.6 cm) high. Flowerheads are produced from March to September.
The plant grows well in disturbed areas, especially those with poor, compacted soil. It can be seen blooming on footpaths, roadsides, and similar places in spring and early summer. In North America, it can be found from central Alaska down to California and all the way to Nova Scotia and Newfoundland. It has also become common and naturalized in Britain.
- USDA, NRCS (n.d.). "Matricaria discoidea". The PLANTS Database (plants.usda.gov). Greensboro, North Carolina: National Plant Data Team. Retrieved 2008-06-14.
- Germplasm Resources Information Network (GRIN) (2005-09-07). "Taxon: Matricaria discoidea DC". Taxonomy for Plants. USDA, ARS, National Genetic Resources Program, National Germplasm Resources Laboratory, Beltsville, Maryland. Archived from the original on 2008-04-22. Retrieved 2008-06-14.
- BSBI List 2007 (xls). Botanical Society of Britain and Ireland. Archived from the original (xls) on 2015-06-26. Retrieved 2014-10-17.
- "Pineapple Mayweed". NatureGate.
- The Wildlife Trusts, "Pineappleweed" http://www.wildlifetrusts.org/species/pineappleweed
- Nyerges, Christopher (2017). Foraging Washington: Finding, Identifying, and Preparing Edible Wild Foods. Guilford, CT: Falcon Guides. ISBN 978-1-4930-2534-3. OCLC 965922681.
- Benoliel, Doug (2011). Northwest Foraging: The Classic Guide to Edible Plants of the Pacific Northwest (Rev. and updated ed.). Seattle, WA: Skipstone. p. 123. ISBN 978-1-59485-366-1. OCLC 668195076.
|Wikimedia Commons has media related to Matricaria discoidea.|
- USDA Plants Profile for Matricaria discoidea (Disc mayweed, Pineapple weed)
- Jepson Manual treatment: for Chamomilla suaveolens —Matricaria discoidea
- University of Michigan Native American Ethnobotany — Matricaria discoidea
- Pineapple weed - Matricaria discoidea
- Robbins, W. W., Margaret K. Bellue, and Walter S. Ball. 1970. Weeds of California. Documents and Publications, Sacramento. 547 p.
- Gregory L. Tilford. 1997. Edible and Medicinal Plants of the West. Mountain Press Publishing Company, Missoula. 110 p.
- University of California-Davis, Statewide Integrated Pest Management Program — 'Pineapple weed'
- Den virtuella floran: Matricaria discoidea distribution
- Matricaria discoidea — U.C. CalPhotos Gallery