. Textbook of botany. Botany. WEEDS AND POISONOUS PLANTS 337. Fig. 189. — The jimson weed. After Weed. devised for dealing with tiie prob- lems raised by the growth of particular weeds. 354. Plants Poisonous When Eaten.—A rather large number of plants contain substances that render them poisonous in greater or less degree when eaten by human beings. Fortunatelj', the number of poisonous plants to be found in any one locality is ordinarily comparatively small, and it is easy to become acquainted with all the dangerous ones that are likely to be met. The poisonous plants most commonly confused w
. Textbook of botany. Botany. WEEDS AND POISONOUS PLANTS 337. Fig. 189. — The jimson weed. After Weed. devised for dealing with tiie prob- lems raised by the growth of particular weeds. 354. Plants Poisonous When Eaten.—A rather large number of plants contain substances that render them poisonous in greater or less degree when eaten by human beings. Fortunatelj', the number of poisonous plants to be found in any one locality is ordinarily comparatively small, and it is easy to become acquainted with all the dangerous ones that are likely to be met. The poisonous plants most commonly confused with harmless ones are perhaps some of the mushrooms (see Chapter VIII, § 109). Another poisonous fungus of considerable importance is the ergot, which is parasitic upon rye and other grains and upon some wild grasses. Of the much more numerous poisonous seed plants, it is true in many cases that the same substance which gives the plant its harmful char- acter also makes it valuable, when properly used, as a medicine. To the class of poisonous medicinal plants belong aconite, belladonna, conium (poison hemlock), helle- bore, American false hellebore, henbane, lobelia, pokeweed, and stramonium ("jimson weed"). Conimn seems to have been the source of the extract which, under the name of "hemlock," was used by the Greeks and Romans for Fig. 190. -The poison hem- the punishment of criminals. The lock (conium). After Weed., water hemlocks, belonging to the. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original Allen, Charles E. (Charles Elmer), b. 1872; Gilbert, Edward Martinius, joint author. Boston, New York [etc. ] D. C. Heath & co
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