Stem. - Two or three feet high. Leaves. - Twice or thrice cleft, the divisions again toothed or cleft. Flowers. - Greenish or sometimes white, borne on long, upright flower-stalks. Calyx. - Of five sepals. Corolla. - None. Stamens and Pistils. - Indefinite in number.

These greenish flowers, which may be found in the woods and meadows throughout the summer, are only striking by reason of their long, erect flower-stalks. The oblong, thimble-like fruit-head, which is rather noticeable in the later year, gives to the plant its common name.