POISONOUS PLANTS 279 



tains no antidote is known. It is all the more to be guarded against 

 in its pure white form, resembling the lepiotcs or edible mushrooms, 

 but, as a rule, the upper surface of the cap is grayish, brownish or 

 greenish. (The different edible mushrooms additional to the white 

 variety as referred to above have caps that are slaty gray, reddish 

 brown, or brownish yellow.) 



In general, it might be remarked that there is risk in taking into the 

 system any part of a plant the properties of which are not known. 

 The leaves of the wild black cherry, for example, are quite poisonous, 

 especially when dried, and the seeds of the Jamestown weed are more 

 deadly than the rest of the plant; but the physician may make proper 

 use of belladonna, strychnine, and aconite. 



LIST OF POISONOUS PLANTS 



Poisonous plants may be divided into two groups : A. Plants which 

 if taken internally either cause irritation or poison the blood. B. 

 Skin irritants. The majority of the plants in the first group are more 

 harmful to farm animals than to human beings. In the second 

 group the reverse is true. 



A. Internally Poisonous: 



Aconitum napellus Hellehorus niger 



Monkshood Christmas Rose 



Amanita muscaria Kalmia angustifolia 



Mushroom Sheep Laurel 



Amanita phalloides Kalmia latifolia 



Mushroom Mountain Laurel 



Arisaema triphyllum Lolium temulentum 



Jack-in-the-pulpit Darnel 



Atropa belladonna Oxytropus lambertini 



Deadly Night-shade Slender Loco-weed 



Ctcuta maculata Passiflora incarnata 



Cowbane Passion Flower 



Conium maculatum Prunus serotina (leaves) 



Poison Hemlock Wild Black Cherry 



Datura stramonium Veratrum viride 



Jamestown Weed Green Hellebore 



Delphinium geyi Xylorrhiza parryi 



Larkspur Woody Aster 

 Zygadenus intermedins 

 Death Camas 



