Abstract.

Beech, Fagus sylvatica.

Leaf.

Barley, Hordeum.

Leaf.

Gingko, Maidenhair tree, Gingko biloba.

Leaf.

Tea Plant, Camellia sinensis.

Horsetail, Field horsetail, Equisetum arvense.

Atlas Cedar, Cedrus atlantica.

Fern.

Yew, Taxus x media.