Swamp agrimony is a North American native with a fondness for moist ground.
Identification: Plants are 2½-5′ (76-152 cm) in height. Leaf
groups emerge alternately from a very hairy central stem. The groups are odd pinnate—composed of opposing
pairs of leaflets and tipped with another leaflet. Leaflets are 2-3″ (5-7.6 cm) × ½″ (1.3 cm), and serrated.
Interspersed between the larger leaflets are much smaller ones less than 1″ (2.5 cm) long.
Yellow flowers about ¼″ (6.3 mm) in diameter, with five petals, are spread along the branches.
They appear from August to September. Fruits are achenes: small fruits that contain
a single seed that nearly fills it.