American Yarrow Achillea borealis Linnaeus    Synonyms: Achillea gracilis, Achillea lanulosa, Achillea millefolium, Achillea millefolium borealis, Achillea millefolium Complex, Achillea millefolium lanulosa, Common Yarrow, Western Yarrow.
Kingdom Plantae   >   Division Tracheophyta   >   Class Magnoliopsida   >   Order Asterales   >   Family Asteraceae   >   Genus Achillea   

Description:

From the Ladybird Johnson Wildflower Center website: Yarrow grows to 3 feet tall and has no branches except near the top. The leaves are alternate, 3-5 inches long, with many leaflets on each side of the midrib (1- pinnately lobed); and these are further divided into smaller leaflets, giving them a delicate, fernlike, lacy appearance. Flower heads are arranged in large, compact clusters at the top of the stem, each cluster consisting of 1 or more flower heads. The flower head has 20-25 yellowish-white ray flowers and similarly colored disk flowers.

Where to find:

Look for American Yarrow along open roadsides and field edges across Maryland.

There are 740 records in the project database.

View at Maryland Plant Atlas

Search Flora of North America

Search Mid-Atlantic Herbaria Consortium

Search Norton-Brown Herbarium

View taxon at iNaturalist

View taxon at NatureServe

Search Google Images

Search MBP Facebook posts (beta | requires login)


[View seasonality details]
GA AL WA FR CL MO HO BA BC HA CE PG AA CV CH SM KE QA CN TA DO WI SO WO 
American Yarrow in Baltimore Co., Maryland (7/1/2012). Photo by Bill Hubick. (MBP list)

American Yarrow in Montgomery Co., Maryland (7/8/2016). Photo by Bonnie Bell. (MBP list)

American Yarrow in Caroline Co., Maryland (8/10/2016). Photo by Wayne Longbottom. (MBP list)

American Yarrow blooming in Anne Arundel Co., Maryland (5/23/2017). Photo by Tyler Bell. (MBP list)

American Yarrow foliage in Anne Arundel Co., Maryland (5/16/2010). Photo by Lynn Strauss. (MBP list)

American Yarrow (leaves and stem) in Anne Arundel Co., Maryland (9/18/2010). Photo by Bill Harms. (MBP list)

American Yarrow growing in Kent Co., Maryland (3/26/2016). Photo by Nancy Martin. (MBP list)

American Yarrow post-flowering in Wicomico Co., Maryland (9/2/2012). Photo by Bill Hubick. (MBP list)

American Yarrow in Harford Co., Maryland (4/29/2018). Photo by Josh Emm. (MBP list)

American Yarrow in Allegany Co., Maryland (5/14/2015). Photo by Kimberly Booth. (MBP list)

American Yarrow in Howard Co., Maryland (10/23/2019). Collected and processed by Helen Lowe Metzman. Photo by USGS PWRC. (MBP list)

American Yarrow in Howard Co., Maryland (10/23/2019). Collected and processed by Helen Lowe Metzman. Photo by USGS PWRC. (MBP list)

American Yarrow in Howard Co., Maryland (10/23/2019). Collected and processed by Helen Lowe Metzman. Photo by USGS PWRC. (MBP list)

American Yarrow in Montgomery Co., Maryland (6/8/2019). (c) Jane Hartman, all rights reserved. Photo by Jane Hartman. (MBP list)

American Yarrow in Caroline Co., Maryland (5/18/2019). (c) Katja Schulz, some rights reserved (CC BY). Photo by Katja Schulz via iNaturalist. (MBP list)

American Yarrow in Wicomico Co., Maryland (5/4/2019). (c) Ashley M Bradford, some rights reserved (CC BY-NC). Photo by Ashley Bradford. (MBP list)


View All Images

Use of images featured on Maryland Biodiversity Project is only permitted with express permission of the photographer.