Senna (Cassia angustifolia) is a small shrub that grows in regions of the upper Nile of North Africa and Arabia.Good Senna may be known by the bright, fresh, yellowishgreen colour of the leaves, with a faint and peculiar odour rather like green tea, and a nauseous, mucilaginous, sweetish, slightly bitter taste.Senna is available as a crushed herb, as a liquid, or as a powdered extract. Senna leaves and pods shall be graded and marked only at such baling presses as can provide proper space and facilities for cleaning, grading and marking and are approved of as such by the Agricultural Marking Adviser.
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