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The Polygonaceae have been included by Harz (7, p. 1072) under the ''Curvembryonaten"' which he speaks of as being furnished with an abundant perisperm, and laterally placed embryo. The term '"'perisperm"' is applied to the remaining portion of the nucellus ina mature seed. Harz (p. 1102) carefully figures and describes the buckwheat seed, considering the entire storage region as perisperm, and stating that the same relation holds in species of Rumex. | Johnson (11, p. 334), evidently influenced by the work of Harz, was led to believe that there is a rather close relationship between the Polygonaceae and the Piperaceae, in which family he observed perisperm. In these Piperaceae he looks upon the very abundant perisperm as the real storage region, it being separated from the embryo by a layer of endosperm, which, instead of acting as a storage region, serves to digest and pass on food material to the embryo from the perisperm. In an earlier paper (10, p. 368) Johnson had already

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This study is the result of a careful investigation of the flora of Michigan with a view to determine which of the poisonous plants listed in other states were found growing in this state. Michigan is not primarily a grazing state, so that the question of poisonous plants is not so vital as in some of the western states like Montana and Utah, but, nevertheless, there is evident a need for more information on the subject than is now available. I have included in this paper a list of the poisonous plants of the state, accompanied by a few notes on their distribution and poisonous nature where such information is available.Not having included algae and fungi in the list of species, it might be well to mention the more important ones in this introductory note. Among the fungi the genus Amanita is by far the most poisonous of any of the umbrella type of mushrooms and should be avoided by people when collecting edible fungi. The spores of Aspergillus when inhaled produce a general mycosis in the lungs of animals. Ergot, the sclerotium stage of Claoiceps purpurea, produces a poisonous effect on animals; in severe cases causing a loss of the extremities of the limbs, tail, and ears. Numerous cases of suspected poisoning from moldy silage have come to the author's attention, but no exact information is available as to the particular fungus causing the poisoned condition.The algae as a group contain few poisonous species.' Although algae may give water an objectionable appearance or odor, they rarely render it poisonous either to stock or to human beings. Furthermore, it is not at all probable that even decaying algae injure the water to the extent of making it poisonous. However, on account of the objectionable odor that the decomposing algae impart to water, and on account of their tendency to clog drain pipes, it is often highly desirable to get rid of them. Many algae are quite easily prevented from growing in water by treatment with copper sulfate at the rate of one part of sulfate to one million parts of water. The small quantities of this. salt that go into solution are harmful to the algae but d~not injure livestock or human beings.