Weimannia racemosa, New Zealand Towai or Tawheri bark.
These species contain 10-13 per cent. of iron-blueing tannin, and have been practically used, but are not of much importance.
TAMARISCINIÆ.
Most of the members of this group are poor in tannin, but several species have galls which are rich.
Tamarix africana; Egypt, Algeria. Galls containing 26-56 per cent. tannin. The small twigs are collected in Tunis, and when dried and ground are imported into Sicily to be used for the adulteration of sumach under the name of “Brusca,” and contain about 9 per cent. of tannin. (Cp. [p. 272].)
T. articulata, Morocco, yields galls produced by aphides, called in Arabia Takout, and stated by Vogel to contain 43 per cent. of tannin.
Tamarix gallica, used in Spain and Italy.
OXALIDEÆ.
Oxalis gigantea, source of churco bark, Chili. A thin, brittle, dark red bark, mostly about 2 mm. thick, cork and ross entirely absent. The bark is brittle, and the cells thin. It contains about 25 per cent. of an easily extracted, dark red tannin, giving green-blacks with iron. The bark has been incorrectly attributed to Fuchsia macrostemma. (Cp. Von Höhnel, ‘Die Gerberinden,’ p. 125, and this book, [p. 284].)