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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 27

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23 the plant as it developes from the seed. In connection with this class of glandular cells we may mention those form which ulmin is formed in the Slippery Elm. The ulmin appears to be deposited in large intercellular spaces, but in reality, it occupies places made vacant by the creaking down of the cells themselves to form this product. The cell-wall really becomes mucilaginous and the cell gives itself up entirely to the formation of ulmin. This secretion is found in the inner bark of the tree and is surrounded by loosely arranged cells. (Plate V. Fig. 2.) Medullary
 
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