Acacia storyi: a potential tannin-producing species

Summary

Bark samples were taken from 94 trees of 10 Acacia species from 19 seed lots selected for rapid growth. The yields, Stiasny values and polyflavanoid content of the hot-water extractives were determined. The attributes of the bark of A. storyi trees were found to be very similar to those of A. mearnsii, which has been commercially used for the production of tannin in South Africa and Brazil. Considering its high polyflavanoid content and exceptionally high tannin purity, A. storyi can be regarded as a potential tannin-producing species. Statistical analysis showed that the polyflavanoid content of the bark can be predicted from the extractives yield.