This section is from the book "An Illustrated Flora Of The Northern United States, Canada And The British Possessions Vol2", by Nathaniel Lord Britton, Addison Brown. Also available from Amazon: An Illustrated Flora of the Northern United States, Canada and the British Possessions. 3 Volume Set..
Mostly about 2° high (1°-5°), minutely glandular, simple or delicately paniculately branched; racemes filiform, short, loosely flowered. Roots tuberous. Stem glabrous, or with scattered hairs above; leaflets thin, commonly 5, mostly oblong or obovate-oblong and obtuse, crenate or dentate, often cuneate, scarcely ciliate; interposed leaf-segments usually a small entire pair; stipules small, entire and lanceolate, or ovate and laciniate; flowers 2"-2i" broad, the buds subglobose, truncate or nearly so; fruit 2" high or less, speading or nodding, hemispheric, the furrows shallow or obsolete; disk very tumid, its rim unmargined, its bristles short and weak, erect or ascending.
Agrimonia pumila Muhl. Cat. 47. 1813.
A. microcarpa Wallr. Beitr. Bot. 1: 39. pi. 1. f. 3. 1842.
Small and slender, 1°-2° high, erect or assur-gent, simple, or with a few branches above. Roots tuberous; stem villous with spreading hairs below, appressed-pubescent above; leaves often crowded toward the base of the stem, frequently 3-foliolate; leaflets 3-5, small, elliptic to obovate or cuneate, obtuse or acute at the apex, often pilose above, soft-pubescent and pale beneath; interposed leaf-segments, if any, a small pair; stipules small, the lower ones lanceolate and entire, the upper rounded on the outer side and laciniate; racemes very loosely flowered, flowers small; fruit 2" long or less, minutely glandular, hemispheric to turbinate; disk flat; bristles few, ascending or erect.
In dry soil, Pennsylvania and Maryland to Florida, Kentucky and Texas. Aug.
Agrimonia Eupatoria var. mollis T. & G. Fl. N. A. I:
Virgately branched, 1 1/2°-6° tall. Roots tuberous. Stem pubescent, or villous below, finely pubescent or canescent above, as also the racemes. Leaves thickish, dull green, veiny, pale and velvety-pubescent beneath; leaflets mostly 7 (5-11), spreading, narrowly oblong to obovate, obtuse or acutish at the apex, trenate to dentate; interposed leaf-segments oblong, mostly a single pair; stipules lanceolate to ovate-oblong, cut-toothed or lobed; flowers 3"-4" broad, the buds subglobose, obtuse; fruit 2" long or more, ascending, spreading or loosely reflexed, oblong, to broadly turbinate; disk flat, or convex, the ascending blender bristles nearly in a single row.
Dry woods and thickets, Massachusetts to Michigan, North Carolina and Kansas. July-Oct.