CHAPTER XIV 



POISONOUS AND MECHANICALLY INJURIOUS PLANTS 

 OF SECONDARY OR LOCAL IMPORTANCE 



POISONOUS PLANTS 

 Milkweeds (Asdepias). — Certain species of milkweed have 

 long been known to contain toxic properties. Whorled milk- 



FiG. 93. — WHORLED MILKWEED {Asdepias galioides). 



This plant is not cropped by stock where ample good feed is available, but it is eaten under stress 



of hunger. Losses of sheep, cattle, and horses are caused by it. 



weed (Asdepias galioides) has caused losses of sheep, cattle, and 

 horses throughout its range, and in some sections these losses 



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