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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 28

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rays (a) are seen crossing the section and octahedral crystals (b) are very frequently noted in the cells surrounding the ulmin (c). Ulmin is the substance which gives to the Slippery Elm its peculiar stringent property and is formed by the combination of the mucilagenous substance, derived from the breaking down of the cell-wall, and an alkaloid which was secreted by the cells, before they themselves became converted into a substance which aided in the formation of ulmin. The transition from a single glandular cell to a secreting
 
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