| Chamomile (flowering parts) (Matricaria chamomilla) L., Compositae.Epidermal cells with sinuate vertical walls; abundant collapsed parenchyma tissue; very porous tracheid-like cells. No starch. The pollen grains with prominent conical projections and three pores form the most marked microscopial characteristic of the powder. The glandular trichromes are usually so much collapsed as to be unrecognizable.
Source: Schneider, A. (1921) The Microanalysis of Powdered Vegetable Drugs, 2nd ed. [1]
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