Surface view: Testa epidermis is composed of elongated, thickened, and pitted cells.

Transverse section: Testa epidermis is composed of radially elongated rectangular cells filled with mucilage; walls are thickened in a U-shape (exterior wall is thickest), very narrow center lumen; mucilage is radially striated; below the epidermis are several layers of polygonal cells with thick, brown, occasionally reticulately thickened walls; these cells are 250-350 |im long and ~80 |im broad; innermost layer consists of compressed rectangular cells with sinuous anticlinal walls; voluminous endosperm is made up of small, polygonal, oil-containing cells.

Powder: Numerous fragments of the exocarp with colorless cell walls and violet contents; thin-walled parenchyma of the mesocarp; thickened and pitted cells of the testa; oil droplets.

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