American journal of pharmacy . re narrow thanthose on the outer rim. The receptacle is conical and not veryprominent. The plant commonly called Bastard Feverfew grows in the WestIndies (where it is known as Escoba amargo), in Florida and inLouisiana. It has been introduced in Europe as Absinthe sauvagedes Antilles. It attains the height of three feet, possesses a peculiarheavy odor, while the leaves and flowers have an intensely bittertaste. The anatomy of the active part of Parthenium hysterophorous issimple. The chaff is composed of longitudinally elongated cells in Am. Jour. Pharnj. April,
American journal of pharmacy . re narrow thanthose on the outer rim. The receptacle is conical and not veryprominent. The plant commonly called Bastard Feverfew grows in the WestIndies (where it is known as Escoba amargo), in Florida and inLouisiana. It has been introduced in Europe as Absinthe sauvagedes Antilles. It attains the height of three feet, possesses a peculiarheavy odor, while the leaves and flowers have an intensely bittertaste. The anatomy of the active part of Parthenium hysterophorous issimple. The chaff is composed of longitudinally elongated cells in Am. Jour. Pharnj. April, 18OT. Partheniu m Hysterophoroiis. 171 single layers, through which pass branching fibro-vascular bundles,the prominent constituent of which are spiral ducts. The scalesterminate in a mass of hairs composed of two to four cells, of whichthe terminal one is the largest. The cells of the corolla of thedisc florets are more symmetrical than those of the chaff, thevascular system is identified by the spiral ducts. The walls of the. Fig. 2. Ray floret, magnified about forty-eight diameters. anther cells possess reticulate markings which are quite character-istic. The pollen grains, as mentioned above, are prickled {^Ftg. ./).A cross-section of a leaf lobe shows the prominence of even thesecondary veins. These project chiefly on the under side. Theclosed fibro-vascular bundle is bi-collateral. The lower half of theleaf is of spongy parenchyma, while the upper consists of a palisadelayer {Fig. 5). The epidermis of the under side is interrupted by 172 Parthenmm Hysterophoroits. { Am. Jour. , 1897. stomata and beset with several-celled tapering hairs {^Fig. (5).^; Theimportant characteristics of the powder are the prickled pollen
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