Page 26 - Pharmacognosy-II (06-PG 303)

d- Endocarp: is formed of very narrow elongated thin-walled cells
arranged in variously oriented groups (parquet-arrangement).

II- The seed: The seed-coat is formed of polygonal brown cells with narrow
collapsed layer underneath.
The endosperm is composed of thick-walled cellulosic cells containing fixed
oil and aleurone grains including globoid and micro- rosette crystals of
calcium oxalate.
III- Carpophore, splits, passing at the apex of each mericarp into the raphe
and at the base to the pedicel.

Powdered coriander
The powder is light brown to brown in colour with aromatic odour and
characteristic aromatic taste.

Microscopic characters:
1. Rectangular sclereids of the mesocarp with underlying endocarp in
surface view.

1a. As 1, showing thinner-walled sclereids.

2. Fragment of a vitta.

3. Epicarp in surface view showing a stoma and calcium oxalate prisms in
some of the cells.

3a. Epicarp in surface view.

4. Groups of fusiform sclereids of the mesocarp, in sectional view.

4a. Groups of fusiform sclereids of the mesocarp showing two layers
orientated at right angles to one another (Sclerenchymatous shell).

5. Testa in surface view.

6. Rectangular sclereids of the mesocarp (sc.) and cells of the endocarp (en.)
in sectional view.

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