312 AUSTRALIAN NATIVE PLANTS. 
23. Acacia penninervis, Sved., (Syn. A. impressa, Lindl.); N.O., 
Leguminosz, B.FI., ii., 362. 
“ Blackwood.” Called ‘‘ Hickory’’ in the Braidwood district of New 
South Wales. 
The bark contains 17.9 per cent. of tannic acid, and 3.8 per 
cent. of gallic acid. (Mueller.) The following analysis is given 
by the Queensland Commissioners, Colonial and Indian Exhibi- 
tion, 1886 :—Tannin, 14.49 per cent.; extract, 33.06 per cent. 
Specimens from Monga, near Braidwood, N.S.W., yielded the 
author (a) from the bark of the twigs, 22.88 per cent. of extract, 
and 16.24 per cent. of catechu-tannic acid; (4) from the bark of 
the trunk, 45.5 per cent. of extract, and 16.96 per cent. of catechu- 
tannicacid. (Proc. R.S., N.S. W. 1887, p. 30.) 
Tasmania, Victoria, New South Wales and Queensiand. 
24. Acacia podalyrizefolia, A. Cunn., (Syn. A. Fraser?, Hook.; 
A. Caleyi, A. Cunn.) ; N.O., Leguminosz, B.FI., ii., 374. 
‘“« Silver Wattle.” 
The bark is used in tanning, giving a light colour to 
leather. The following analysis is given by the Queensland Com- 
missioners, Colonial and Indian Exhibition, 1886 :—Tannin, 12.40 
per cent.; extract, 29.50 per cent. 
Northern: New South Wales and Queensland. 
25. Acacia polystachya, A. Cunn., N.O., Leguminosz, B.F1., ii., 
407. : 
The following is an analysis of this bark:—Tannin, 7.59 per 
cent. (Staiger.) 
Queensland and Northern Australia. 
26. Acacia pycnantha, Benth., (Syn. A. petiolaris, Lehm.; A. 
falcinella, Meissn.); N.O., Leguminosz, B.FI., ii., 365. 
“ Black, Green, or Golden Wattle.” ‘“ Broad-leaf Wattle.” ‘ Witch” 
of the aboriginals of Lake Hindmarsh Station (Victoria). 
One of the richest tanning barks in the world. A sample in 
the Technological Museum contains 33.5 per cent. of tannin, 
according to an analysis by Mr. Thomas, of Adelaide. This tree, 
which attains a maximum height of about thirty feet, is second per- 
