5 



5. Stringyhark Group. — This includes a number of fissile timbers that pass 

 into each other, and may be subdivided as follows : — 



{a) True Slr'mgybarks. — Examples — eugenioides, macrorrlnjncha, capitellata, 

 ohliqua, Balleyana. 



{b) Blackhatts. — Examples — pilularis (which absolutely connects with the 

 Stringybarks through its variety Muelleriana), acmeuioides. Those arc 

 the most valuable timbers of the group. 



{c) Peppermints. — Examples — amygdalina, regnans, dives, piperita. These 

 timbers have gum-veins, and are altogether inferior in quality. 



Allied to these is the — 



G. Mountain Ash Group.— '¥\&?,\\g timbers usually pale in colour, and with 

 bark not so fibrous as the preceding. Examples — Sieberiana, Flanchoniaua, 

 virgata and its varieties, Risdoni, cordata. 



7. Tallow-wood and Spotted Gum. — microcorys and maculata (two valuable 

 pale-coloured timbers), sui-generis. 



8. Bloodwoods. — These have gum-veins, and are coarse-grained ; corymbosa 

 is red, and eximia and trachyphloia, which are pale, connect with maculata. 



9. Jarrah Group. — Containing a number of heterogenous species, and which 

 I name after the best-known member. Some have fibrous barks, others are 

 smooth ; but they are all deep-red, durable timbers. Examples — marginata, 

 resinifera, diversicolor, p^'opinqua, punctata, saligna, botryoides, robusta, 

 tereticornis, rostrata, longifolia. 



This group connects with the Red Boxes. 



The timber of the same species varies a good deal according to the soil and 

 situation, and our knowledge does not yet enable us to discriminate between some 

 timbers not closely allied botanically. In other words, a man who professes to 

 discriminate between all species of timber attempts the impossible. 



Exudations.— In Froc. Linn. Soc, N.S.W., 1890, I jiroposed examination 

 of the kinos as an aid in the diagnosis of eucalypts, and I divided them into 

 three groups according to their behaviour in water or alcohol (spirit). 



1. Ruhij Group. — Consisting of ruby-coloured kinos, soluble in water and 

 alcohol in all proportions. Examples are — all Eenanthertc except microcorys. 



2. Gummy Group. — Soluble in water, but insoluble in alcohol owing to the 

 gum ihey contain. Examples — the ironbarks. 



3. Turbid Group. — These kinos are soluble in hot water or hot alcohol, but 

 deposit sediments on cooling. Examples — most of the Parallelantheroe. This 



