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Vegetable secretions and the means by which by are effected by Kate L. Hudson, 1888

Vegetable secretions and the means by which by are effected by Kate L. Hudson, 1888, Page 40

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36 original thin-walled cells become the secreting cells and project into the cavity. The resin ducts here studied are then formed in the Sumach, Pine and Balsam. In the Sumach large glands are formed in the bark near the margin and smaller ones are scattered through the inner portion. The glands are oval in outline, lined with thin-walled secreting cells. Fig. 1. Plate V represents a cross section of the Sumach. The section is made up first of a layer of elongated parenchymatons cells (a), rich in
 
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