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FNA | Family List | FNA Vol. 9 | Rosaceae | Agrimonia

1. Agrimonia parviflora Aiton, Hort. Kew. 2: 130. 1789.

Agrimonia polyphylla Urban; A. serrifolia Wallroth; A. suaveolens Pursh

Herbs, 5–20 dm. Roots: tubers absent. Stems with glistening glandular hairs (stipitate and sessile) and pubescent to villous and hirsute (hairs stiff, scattered, erect, 2–3 mm). Leaves: mid cauline stipules ± falcate, margins dentate, ˂apical lobes long-attenuate˃; major leaflets 3–19 (mid cauline 9–13), minor 1–4 pairs; major leaflet blades lanceolate to narrowly elliptic, rarely narrowly rhombic, terminal largest, largest of these 3.4–8.5 × 1.2–2.4 cm, margins serrate to dentate, apex acuminate or long-acuminate, rarely acute, abaxial surface usually glistening with sessile-glandular hairs and pubescent to villous and hirsute (hairs stiff, ± scattered, 1–3 mm, densest along major veins). Inflorescences: axes glistening with sessile-glandular hairs and pubescent to villous and hirsute (hairs scattered, ± erect, 1–2 mm, usually lacking distally). Flowers usually ± subopposite. Fruiting hypanthia broadly campanulate to broadly turbinate, rarely broadly obconic or hemispheric, 1.3–3 × 1.7–3.8 mm, moderately to shallowly sulcate, hooked bristles in 3–4 circumferential rows, proximal row spreading ± 90° to ± reflexed, usually glistening with sessile-glandular hairs, ˂ridges sometimes sparingly hirsute˃. 2n = 28.

Flowering mid Jul–early Sep. Edges, open spaces, thickets deciduous or mixed woods and thickets in wet places; 0–1100 m; Ont.; Ala., Ark., Conn., Del., D.C., Ga., Ill., Ind., Iowa, Kans., Ky., La., Md., Mass., Mich., Miss., Mo., Nebr., N.J., N.Mex., N.Y., N.C., N.Dak., Ohio, Okla., Pa., S.C., S.Dak., Tenn., Tex., Va., W.Va., Wis.; West Indies (Dominican Republic); introduced in South America (Argentina, s Brazil).

Plants of Agrimonia parviflora with major leaflet blades narrowly elliptic and with acute apices are occasionally found throughout the range. Eupatorium parviflorum (Aiton) Nieuwland is an illegitimate name that pertains here.


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