Vascular Plants of North Carolina
Account for Swamp Agrimony - Agrimonia parviflora   Aiton
Members of Rosaceae:
Members of Agrimonia with account distribution info or public map:
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Section 6 » Order Rosales » Family Rosaceae
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AuthorAiton
DistributionOccurs throughout the Piedmont and Mountains. Widely scattered into the western and central Coastal Plain, with a disjunct records from Onslow and Pitt counties.

This is a widespread species in the Eastern and Central states, ranging from NY and NE south to central AL and northeastern TX.
AbundanceCommon essentially throughout the Mountains and Piedmont, despite a few counties lacking records. Very rare to rare into the Coastal Plain. Over the majority of the state, this is the most numerous species in the genus and attracts attentiuon due to its size.
HabitatThis is essentially the only Agrimonia that favors wetlands. It grows in rich soil of bottomland forests, swamps, marshes, wet thickets, and wet meadows. It favors some light gaps in forests and is not normally seen in deep shade. It also prefers higher pH soils.
PhenologyBlooms from July to September, and fruits from July to October.
IdentificationThe genus Agrimonia has numerous species with distinctive leaves and flowering stalk, but the characters to separate many are quite technical, and biologists may have trouble keying them out. All have erect stems ranging in the vicinity of 3 feet tall, with alternate leaves that are distinctly pinnately compound, with small leaflets intermixed with much larger ones. Also, the inflorescence is a very long and slender spike-like raceme of tiny yellow flowers; these plants should be easily identified to genus level. In this species, the stem is very stout and may reach up to 4-4.5 feet tall. This is the only "easy" species in the genus to identify, as the number of leaflets is the key. In this species, there are usually 11-19 large leaflets, that is, one large terminal one and 5-9 pairs of large ones along the rachis. As with others, there are small leaflets between the large ones; however, all of the others have generally 5-11 large leaflets, and usually 5-9. This is usually the only Agrimonia that grows in swamps and bottomlands, though that by itself is not a conclusive character.
Taxonomic CommentsNone

Other Common Name(s)Southern Agrimony, Small-flowered Agrimony, Harvestlice
State RankS5
Global RankG5
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