Page 11 - Pharmacognosy 02-06203

Patients with gallstones should not use Menthae piperitae leaf unless under medical supervision.

Purity tests:

Foreign organic matter
Not more than 5% stems, the diameter of which must be not more than 1.5 mm; not more than
8% leaves showing brown stains due to Puccinia menthae; not more than 2% other foreign
matter.

T.S. of Peppermint Stem

Thyme

‫ الصع ر ت‬- ‫الزع رت‬
Thyme consists of the whole leaves and flowers separated of Thymus vulgaris L. or Thymus zygis
L. or a mixture of both species, Family Labiatae (Lamiaceae).

Microscopic Characters:

The transverse section of the stem shows hairy epidermis with diacytic stomata , non-glandular
trichomes being short, unicellular, short conical and as pointed teeth, and 2-3-celled, uniseriate,
sharply pointed with warty walls elbow-shaped (bent or geniculate). Glandular trichomes are
numerous (labiaceous).

Constituents:

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