Distanskurs i örtterapi.

Betula images: systematical overview.

-I- ACUMINATAE - Acuminatae
-II- ASPERAE - Asperae
-III- ASPERAE - Lentae
-IV- BETULA - Apterocaryon and BETULA - Betula
-V- BETULA - Betulae
-VI- BETULA - Costatae, BETULA - Dahuricae and NIPPONOBETULA - Nipponobetula

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