William P. C. Barton, Medical Botany, 1817
Table 21, Sweet Scabious, Erigeron heterophyllum
(image courtesy of University of Pennsylvania Rare Book & Manuscripts)
Table 22, Butterfly weed, Asclepias tuberosa
(image courtesy of University of Pennsylvania Rare Book & Manuscripts)
Table 23, Fiddle-leaved Blind-weed, Convolvulus panduratus
(image courtesy of University of Pennsylvania Rare Book & Manuscripts)
Table 24, Centaury, Sabbatia angularis
(image courtesy of University of Pennsylvania Rare Book & Manuscripts)
Table 25, May Apple, Podophyllum peltatum
(image courtesy of University of Pennsylvania Rare Book & Manuscripts)
Table 26, Yellow Root, Hydrastis canadensis
(image courtesy of University of Pennsylvania Rare Book & Manuscripts)
Table 27, Cancer-root, Beech-drops, Orobanche virginiana
(image courtesy of University of Pennsylvania Rare Book & Manuscripts)
Table 28, Virginian Snake-root, Aristolochia serpentaria
(image courtesy of University of Pennsylvania Rare Book & Manuscripts)
Table 19, Sweet fern, Comptonia asplenifolia
(image courtesy of University of Pennsylvania Rare Book & Manuscripts)
Table 30, Sweet Flag, Calamus, Acorus calamus
(image courtesy of University of Pennsylvania Rare Book & Manuscripts)
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Source
William P.C. Barton, M.D., Vegetable Material Medica of the United States; or Medical Botany...Illustrated by Coloured Engravings, made after original drawings from nature, done by the author. 1817.