American Yarrow Achillea borealis Linnaeus    Synonyms: Achillea gracilis, Achillea lanulosa, 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 703 records in the project database.

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

American Yarrow in Harford Co., Maryland (4/29/2018). Photo by Josh Emm. (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 Wicomico Co., Maryland (5/4/2019). (c) Ashley M Bradford, some rights reserved (CC BY-NC). Photo by Ashley Bradford. (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)


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