Page 163 - Pharmacognosy-I (02-06-06-102)

Galls

Aleppo Galls

Definition : Galls are vegetable outgrowths resulting from the

deposition of the eggs of gall-wasp, Adleria (cynips) galla tinctoriae
family cynipidae, on the young twigs of Quercus infectoria (dyer's oak)
family Fagaceae.

Formation of Aleppo Galls

- The dyer's oak is a small tree or shrub found in Turkey, Syria and
Greece.
1- Abnormal development of vegetable tissue around
the larva.
2- A central cavity is formed in which the insect
passes through the larval and pupal stages.
3- Colour of the gall passes from a bluish grey
through olive green to almost white.

Macroscopic characters:

Aleppo galls : are globular or nearly spherical in shape and from 10-25
mm in diameter. They have a short, basal stalk and numerous rounded
projections on the surface. Galls are hard heavy, usually sinking in water.

Internally :

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