ON SOME N.S.W. TAN-SUBSTANCES. 87 



19. Eucalyptus Gunnii, Hooker, fit. var. [For particulars as to 

 Natural Order &c, see E. Gunnii (Delegate variety).] 



Vernacular Name (of this variety) — " Red Gum." Timber 

 considered by most people in the neighbourhood to be the 

 very best for standing under ground, and therefore 

 preferred to any other for posts and piles, and especially 

 for house-blocks. It is also used for fencing, slabs, &c. 



Locality whence this particular specimen was obtained— 

 Bombala, N.S.W. 



Geological Formation— Granite. 



Part of the Tree Examined — Bark. 



Particulars of the trees whence it was obtained — height 80 

 to 100 feet, diameter 3 to 4 feet. 



Collected 6th January, 1887. Analysed 13th to 23rd July, 

 1887. 



There are several differences between the two varieties of E. 

 Gunnii which have yielded the barks examined in this paper. The 

 variety from Delegate occurs near creeks and swampy places, the 

 trunk is apt to branch out at no great altitude from the ground, 

 and the timber is universally condemned as entirely useless for 

 technical purposes ; it is soft, brittle, and lighter in colour than 

 the variety from Bombala. The latter variety grows in higher 

 and drier situations, has a pretty straight trunk ; the timber is 

 rather hard to cut, and of a reddish colour. There is great diversity 

 of opinion as to the value of this timber ; while some consider it 

 one of the most durable timbers to stand in the ground, others 

 consider it of no use. It may be that some of those people who 

 consider it one of the best timbers to stand in the ground confuse 

 it with the Red Gum (E. rostrata) of the coast country. The 

 bark now under examination is less deeply fissured than that 

 from Delegate, and the fibre is more curled and interlocked. 

 Both barks possess the odour of essential oil, — a most unusual 

 circumstance for Eucalypt barks. This bark gives a solution of 

 a much deeper colour (reddish-brown), than does the variety from 

 Delegate. Colour of residue, dark brown. 



Extract. — Soluble in water at 100° C. 20*84 per cent. 



Kino-tannic acid — 11 '35 per cent. 



20. Acacia colletioides, A. Cunn., var.* N.O. Leguminosae, B. 

 Fl. ii., 325. Figure, Dec. i., " Iconography of Australian 

 Acacias," (Mueller). 

 Found in New South Wales, Victoria, South Australia, and 

 recently, in Western Australia. 



* This variety only differs from the normal form in the flower-heads 

 not being strictly globular. 



