Common yarrow

A closer look.

The Forest Service describes dry, open habitats and both native and introduced North American forms that are difficult to separate and can hybridize. Kew’s current treatment gives a narrower native-range interpretation. These differing concepts require a current California taxonomic review before a local plant can be assigned native status.

USDA Forest Service · Keith C. Aleksoff, 1999 ↗ · Royal Botanic Gardens, Kew ↗

Through the seasons

Spring and summer remain approximate editorial browsing tags. A locally appropriate flowering calendar and taxon-specific treatment remain pending.

Knowledge has a context.

Historical-use claims are deliberately withheld until a specific community, taxon, and source can be responsibly attributed and reviewed. No therapeutic claims are made.

A record of where it was found.

Yarrow is documented in California, but older broad species concepts and current treatments are not fully aligned. GBIF specimen records follow its matched taxon concept; they do not resolve identity or native status.

Meadows & open ground

Northern California · Central California · Southern California

What this map includes

From the first 300 results returned by the stored GBIF query, 33 specimens met the coordinate and reuse filters; 267 were excluded. The query matched 2,669 records at retrieval. This subset is not random or exhaustive.

Records are labeled California, have coordinates, and lack GBIF geospatial-issue flags. We exclude known coordinate uncertainty above 25 km and use only CC0 or CC BY 4.0 records. 33 included records do not report coordinate uncertainty. A 0.25° cell is about 28 km north to south; it does not show an exact collecting site.

Matched taxon: Achillea millefolium ↗. This GBIF taxon concept does not resolve the North American yarrow taxonomy conflict.

Inspect the stored query ↗ · Download the attributed snapshot ↓

USDA Forest Service · Keith C. Aleksoff, 1999 ↗ · Royal Botanic Gardens, Kew ↗

Trace the record.

References are attached to specific parts of this record. A citation is a route to evidence; it is not a claim that every field has completed review.

1. 01Achillea millefolium — Fire Effects Information System ↗

   USDA Forest Service · Keith C. Aleksoff, 1999

   Supports: Morphology, open habitats, North American occurrence, and the difficulty of separating native and introduced forms; historical taxonomy.

2. 02Achillea millefolium L. — Plants of the World Online ↗

   Royal Botanic Gardens, Kew

   Supports: Current accepted-name treatment and native-range interpretation; differs from older broad North American treatments.

3. 03GBIF occurrence records & citation guidance ↗

   GBIF Secretariat and contributing data publishers

   Supports: Specimen occurrence snapshot. Each contributing dataset, DOI where available, record identifier, and license is retained in the downloadable map data.

4. 04TIGERweb — States and Counties ↗

   US Census Bureau

   Supports: Generalized California state outline only; does not imply a species distribution.