The genus Cinnamomum

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oc
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co
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Figure 2.10 Microscopical features of bark powder of C. verum. 1, 1a. Fibres. 2. Selereids. 3. Starch
granules. 4. Cork in surface view. 5. Phloem parenchyma and oil cells (oc). 6. Parts of
medullary ray with some of the cells containing acicular crystals of calcium oxalate (co)
and associated phloem parenchyma in tangential longitudinal section. 7. Calcium
oxalate crystals. 8. Part of the fibre with an associated oil cell and phloem parenchyma.
9. Part of a group of fibres and selereids from the pericycle. 10. A single oil cell. 11. Part
of the cork and cortex in sectional view. (Source: Jackson and Snowdon, 1990.)
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