|Tall hairy agrimony|
|A. gryposepala flowers|
Agrimonia gryposepala (commonly known as tall hairy agrimony,  common agrimony,  hooked agrimony,  or tall hairy grooveburr ) is a small perennial flowering plant of the rose family ( Rosaceae), which is native to North America. This plant was used by various indigenous peoples to treat medical problems such as diarrhea and fever.
The plant grows 1–5 ft (about 30–150 cm) high, producing a cluster of small, yellow, 5-parted flowers on a hairy stalk above pinnate leaves. The fruits are hooked dry seeds grouped in a cluster. A spicy scent is released when the stem is crushed.   The plant's native range covers most of the United States and Canada (except the Rocky Mountains)  and extending south to Chiapas, Mexico.  It grows in woodlands and forests. 
The specific epithet, gryposepala, is derived from the Greek grypos, meaning curved or hooked,  and from sepala, meaning sepal.  The name "grooveburr," which is sometimes applied to the plant, comes from the grooved shape of the seedpod or burr.
Across North America, various indigenous peoples used the plant for medicinal purposes. Among the Iroquois people, a drink made from the roots of the plant was used for diarrhea.  Among the Cherokee, the plant was used for the same purpose, to reduce fever, and for a range of other problems.  The Ojibwe used the plant for urinary problems,  and the Meskwaki and Prairie Potawatomi used it as a styptic for nosebleeds. 
- Plants Profile for Agrimonia gyrosepala Retrieved 2010-03-13.
- "Agrimonia gryposepala". Germplasm Resources Information Network (GRIN). Agricultural Research Service (ARS), United States Department of Agriculture (USDA). Retrieved 2010-03-13.
- ITIS Standard Report Page: Agrimonia gryposepala Retrieved 2010-03-13.
- Lady Bird Johnson Wildflower Center Retrieved 2010-03-13.
- Robert W. Freckmann Herbarium University of Wisconsin - Stevens Point Archived 2011-09-28 at the Wayback Machine Retrieved 2010-03-13.
- Henry Liddell and Robert Scott, A Greek-English Lexicon, online at the Perseus Project.
- "Plants Profile for Agrimonia gryposepala (tall hairy agrimony )". plants.usda.gov. Retrieved 22 January 2018.
- James W. Herrick and Dean R. Snow (1997). Iroquois Medical Botany. Syracuse University Press. p. 161. ISBN 0-8156-0464-5.
- Daniel E. Moerman (2009). Native American Medicinal Plants: An Ethnobotanical Dictionary. Timber Press. pp. 52–53. ISBN 0-88192-987-5.
|Wikimedia Commons has media related to Agrimonia gryposepala.|