In this work, a study on tannins (proanthocyanidins and ellagitannins)
is carried out in bark extracts from different Eucalyptus species gro
wn in Spain: E. camaldulensis, E. globulus and E. rudis. The tannin an
alysis was carried out using HPLC and classical chemical methods. Bark
extracts were characterized by the abundance of polymeric proanthocya
nidins and by the diversity of ellagitannins. The ellagitannins compos
ition was related with the species and the tree provenance, allowing t
o discriminate E. globulus from E. camaldulensis and E. rudis.