322 



2. Hemipihloice (Half -barks). 



(a) Kenantherae, with pale timbers. Including eastern Peppermints, also 



Blackbutts and Mountain Ash. 



(b) Boxes (timbers pale). 



(c) Timbers reddisli-brown. 



(d) Western Australian species (a provisional group). 



3. RhytiphloicB (Whole-barks, in contradistinction to the Hemiphloige) . 



(a) Pale timbers. 



(b) Eed timbers (Mahoganies in part). 



4. Pachyphloice (Stringybarks), including a small group of dwarf species. 



5. Schizophloice (Ironbarks), also (a) Ironbark-Boxes, an 

 intermediate group. 



6. Lepidophloice (with lamellar or uniformly flaky barks— the Bloodwoods). 



(a) Dark-barked and with red timber. 



(b) Yellow-jackets, with pale timber. 



(c) An intermediate small group (including E. calophylla), with pale timber. 



(d) Eudesmise (excluding the Marlocks). 



(e) Tessellatae (those with tessera? on the lower part of the trunk, e.g., E. tessellaris. 

 (/) Angopkoroideee (species, e.g., E. clavigera, very closely allied to Angophora) . 



0. Mallees, Marlocks, and other small species. 



The vast majority of Eucalypts will be found to be under 150 feet in height, 

 while in the interior districts a tree of 100 feet is accounted a large one. Some of the 

 largest trees have been referred to at Part XL VIII, p. 254. 



The smallest species are mostly included under the Mallees (Marlocks). While 

 it is obviously simple to record those which are, in the present state of our knowledge, 

 largest and smallest, the puzzle is to classify the intermediate forms. This is the 

 difficulty that so frequently confronts us in Eucalyptus — we have ascertained A and Z 

 (or think we have), but what are we to do with B to Y. Even in Mallees and Marlocks 

 we have this problem of intermediates. 



A large number of species may be described as small — Mallees and Marlocks — ■ 

 the smaller ones usually spindly and with the bark smooth, but exhibiting the usual 

 exfoliation which result in the falling-off of ribbons, or of flakes of old, hard bark. The 

 majority of them naturally occur in " hard " conditions, and are assumed to be old 

 or disappearing forms, struggling in a difficult environment. 



