§ 621. The Locust Tree.—The Robinia pseudo-acacia, a papilionaceous tree, contains a poison in the leaves and in the bark. R. Coltmann [629] has recorded a case in China of a woman, twenty-four years of age, who, at a time of famine, driven by hunger, ate the leaves of this tree. She became ill within forty-eight hours, with high fever; the tongue swelled and there was much erysipelatous-like infiltration of the tissues of the mouth; later the whole body became swollen. There was constipation and so much œdema of the eyelids that the eyeballs were no longer visible. Recovery took place without special treatment. Power and Cambier[630] have separated from the bark an albumose, which is intensely poisonous, and is probably the cause of the symptoms detailed.
[629] Medical and Surgical Reporter, lxi., 1889.
[630] Pharm. Journ., 1890, 711.
§ 622. Male Fern.—An ethereal extract of Aspidium Filix mas is used as a remedy against tape worm.
Poullson[631] has collected up to the year 1891 sixteen cases of poisoning by male fern; from which it would appear that 7 to 10 grms. (103 to 154 grains) of the extract may be fatal to a child, and 45 grms. (rather more than 11⁄2 oz.) to an adult. The active principle seems to be filicic acid and the ethereal oil. Filicic acid, under the influence of saponifying agencies, breaks up into butyric acid and phloroglucin.
[631] Arch. exp. P., Bd. 29.