Rayless Marigold.Bidens frondosa.
Found in August and September, lying in wait for travellers along roadside ditches and in wet fields.
The stalk, which grows any height from 2 to 6 feet, bears branches in pairs; is very leafy, and stout, round, coarse-fibred, and slightly shining. In color, purplish green.
The leaf is divided into 3 or 5 lance-shaped parts; the margin is toothed, and the texture is coarse; it is set on short, ribbed-stems, and springs from a noticeable joint, in pairs, at regular intervals along the stalk, and branches. It is dull green in color.
The flowers are very small, and ragged, of a dull tawny orange; they are crumpled tightly into a flat head, and sometimes partly surrounded by 1 to 3 inconspicuous, little, dull yellow, rays. The head is encircled by small, narrow, green, leaf-like parts of irregular lengths; it is set on a short green stem. Two or three heads are gathered in a terminal group.
The cup-like joint of the leaf-stems is worth careful consideration, it is so neatly finished. The seed is dark and shining, and oppressively civil in its attentions to heedless wayfarers.