The early =symptoms=, which are only seen in chronic cases, consist in excitement, followed by somnolence and muscular weakness, with slowing of the respiration and circulation. POACEÆ (GRASS FAMILY). =Lolium temulentum.=—The seed of the darnel, or poison rye grass, an introduced annual especially abundant on the Pacific Slope, is considered poisonous to both man and animals. =Stipa robusta.=—This is a perennial plant which is known in Arizona and New Mexico as sleepy grass. It produces a narcotic effect on horses and cattle that feed upon it, but stock bred in that region rarely touch it. =Zea mays.=—The numerous deaths that are frequently attributed to Indian corn are mostly due, not to any poison inherent in the plant, but rather to parasitic or saprophytic fungus growths, as noted under _Aspergillus_ and _Ustilago_. The green fodder is very apt to cause severe and even fatal tympanites if the animal’s diet is not properly regulated. Death has also been attributed to the presence of nitre (potassium nitrate) in the growing stalks. It is supposed that in very rich soil this substance will sometimes accumulate in the stalks in considerable quantity during prolonged drought. POISONING BY THE MALE TUFTS OF MAIZE. The green tufts alone are toxic; the toxicity disappears after drying. Prolonged administration produces nephritic colic and renal lithiasis. POISONING BY SWEET SORGHUM GRASS. This form of poisoning is characterised by attacks of trembling, tympanites, and frequent attempts to urinate. The heart beats feebly, and the pulse grows progressively weaker, until at last it becomes imperceptible. MELANTHACEÆ (BUNCH-FLOWER FAMILY). * =Chrosperma muscætoxicum.=—The bulbous portion of the fly poison, or crow poison, an eastern plant, is sometimes eaten by cattle with fatal results. The bulbs, when crushed with molasses, are used to stupefy flies. [Illustration: $1] [Illustration: $1] * =Veratrum viride.=—The leaves of the common swamp hellebore (American white hellebore; false hellebore; Indian poke) of the eastern and northern portions of the United States have proved fatal to man and to horses. Sheep eat the young leaves and shoots with apparent relish. The seed is poisonous to chickens. =Zygadenus venenosus.=—The name death camas has been applied to this plant in the North-West of America to distinguish it from the true camas (_Quamasia quamash_), which is highly esteemed for food by the Indians. In Oregon it is erroneously called “lobelia” by most stockmen and farmers. Horses, cattle, and sheep, as well as man, are poisoned by eating the bulb. =Zygadenus elegans.=—The bulbs, and perhaps the leaves, of the _Glaucous zygadenus_, or alkali grass, are poisonous to cattle. CONVALLARIACEÆ (LILY OF THE VALLEY FAMILY).