Table 20. Erigeron philadelphicum.

Fig. 1. Is a figure of the upper portion of Erigeron Philadelphicum, of the natural size, in flower. The blue variety is here represented, because of the greater facility of figuring blue than white flowers; at least of such a form as these. The white variety is more common.
2. The lower portion of the same, cut asunder at the asterisk.

This image is from W. Barton's Vegetable Materia Medica, 1817 (Vol. I), 1818 (Vol. II), Erigeron.