6 Select Plants for Industrial Culture 



Acacia gummifera, Willdenow. 



This tree yields principally the Gum Arabic of Morocco. (Sir 

 Joseph Hooker and John Ball.) The principal collecting time 

 extends over six weeks in midsummer. 



Acacia harpophylla, F. v. Mueller. 



Southern Queensland. A tree, sometimes attaining a height of 90 

 feet, furnishing locally a considerable share of the mercantile wattle- 

 bark for tanning purposes. Wood, according to Mr. P. O'Shanesy, 

 brown, hard, heavy and elastic, of violet odor; it splits freely and 

 is thus also well adapted for fancy lathe-work ; used by the natives for 

 spears. The tree grows naturally on sand-lands, almost to the 

 exclusion of other trees and shrubs. Saplings used as stakes in vine- 

 yards have lasted 20 years and more. The tree yields also consider- 

 able quantities of gum. It is one of the principal " Brigalows " in. 

 the scrubs of that designation. 



Acacia heteroclita, Meissner. 



South- Western Australia. This or an allied species furnishes a 

 particular sort of edible gum, called by the autochthones " Quannot." 

 (Hon. John Forrest.) 



Acacia homalophylla, Cunningham. 



The Victorian " Myall," extending into the deserts of South-Aus- 

 tralia and New South Wales. Never a tall tree. The dark-brown 

 wood is much sought for turners' work on account of its solidity and 

 fragrance; perhaps its most extensive use is in the manufacture of 

 tobacco-pipes. Allied species pass under the aboriginal appellation 

 "Boree." 



Acacia horrida, Willdenow. 



The "Doornboom" or "Karra-Doorn" of South- Africa. A for- 

 midable hedge-bush with thorns often 3 inches long, readily available 

 for impenetrable hedge-rows. It exudes also a gum of good quality, 

 but often of amber-color. This is the principal species used for 

 tanners' bark in South-Africa, where Leucospermum conocarpum 

 (R. Br.) is also extensively employed for the same purpose (Me 

 Gibbon). It imparts however an unpleasant odor to the leather 

 made with it (McOwan). 



Acacia implexa, Bentham. 



Victoria, New South Wales, Queensland. A tree of middle size, 

 content with poor soil. Wood firm and close, dark-brown with 

 yellowish stripes; much in demand for turnery, cogwheels and other 

 purposes, which need tenacity and strength (Dickinson). Bark 

 available for tanneries. 



Acacia Koa, A. Gray. 



Hawaii ; there one of the most valuable of timber-trees. Stem 

 reaching a height of 60 feet, topped by wide-spreading phyllodinous 

 foliage. Wood easy to work, particularly in a fresh state; formerly 



