Persea Lingue bark is red-brown, soft, and easily exhausted by water; it contains 20-24 per cent. of tannin, and much slimy matter which promotes the swelling of the hides. It serves in South America, especially in the Chilian province of Valdivia, for tanning Valdivia leather. In Southern Chili are enormous forests of the tree. The imported bark has given good results with heavy leathers.
Phyllocladus tricomanoides bark, the kiri-toa-toa of New Zealand, contains 23 per cent. of tannin.
Polygonum amphibium leaves, an annual plant abundant in the Missouri Valley, contain 18 per cent. of tannin, and can be mown and stacked like hay. It is largely used in Chicago tanneries, and said to give a leather which is tougher, more durable, of finer texture, and capable of higher polish, than that tanned with oak-bark.
Punica Granatum fruit-rind, the pomegranate, contains about 13·6 per cent. of a tannin like myrobalans, and a considerable quantity of starch; the tannin is greatest in the bitter kind, which is used for preparing morocco leather; the root-bark also is rich in tannin.
Rhizophora Mangle bark, the mangrove, of Venezuela, contains 24-30 per cent. of deep-red tannin, if obtained from young stems; samples from the West Indies have given 11·94 per cent., probably by the gelatine process; two samples from Shanghai, by Löwenthal's improved method, gave respectively 9·8 and 9·5 per cent. calculated as oak tannin, and 71·96 and 78·52 of woody fibre. Guayaquil exported 9328 cwt. of the bark to Peru in 1879.
Tecoma pentaphylla bark, the roble colorado of Venezuela, contains 27 per cent. of tannin, accompanied by a soluble orange-red colouring matter.
Wagatea spicata pods contain 15 per cent. of tannic acid. The plant, a scrambling shrub, is a native of the Concans.
Weinmannia racemosa bark, the tawhero towai, or kamai of New Zealand, contains 12-13 per cent. of tannin.