Family, Rose. Color, yellow. The genus Agrimonia may be known by a terminal long spike of small yellow flowers whose calyx is tubular, 5-lobed, its throat and margin being covered with hooked bristles. After the petals fall, this calyx closes over the fruit, investing it with bristles, so that it becomes a small bur. The fruit consists of 2 achenes, one in each of a pair of carpels. Stamens, 5 to 15. Leaves are pinnate, composed of several pairs of leaflets, with small ones intermediate, and large, prominent stipules, all deeply serrate.
Agrimony (Agritnonia striata)
The following species are found in the Eastern States from Maine to Georgia:
A. striata. - Flowers, in loose, narrow racemes, widely separated. Leaflets, crenate, sessile, generally 5, with quite small intermediate leaflets. 1 to 5 feet high, more often 2 feet. Late summer.
Moist woods. (See illustration, p. 175.)
A, mollis. - Stem and leaves, softly hairy. Leaflets, mostly 7, dull green, widely spreading. Fruit, top-shaped, broad above, bristles borne on a flat or convex disk. 1 1/2 to 6 feet high. July to September.
A. parviflora. - Spikes, many and rather closely flowered. Stem, rough, 2 to 6 feet high. Leaflets, 9 to 17, thin, linear, sharply toothed, crowded, with many smaller ones between of varying size. July to October.
Dry, sandy soil.
A. rostellata. - Stem, slightly glandular from a tuberous root, covered with scattered hairs. Leaflets, about 5, ovate or oblong, crenately toothed, the intermediate ones very small. Stipules, large, toothed. Flower - spike loosely covered. July to September.
Dry, rocky woods.
A. gryposepala. - Stem, very glandular, hairy. Leaflets, large, thin, about 7, ovate or oblong, sharply serrate. 2 to 6 feet high. June to August.
Woods and thickets, dry or moist soil. The species are difficult to separate.