86 J. H. MAIDEN. 



we thought presented an instance of hybridism. Later on * 

 I stated that I had no doubt as to its hybrid nature. I have 

 had the tree under observation ever since, and am of opinion 

 that it is a form sufficiently distinct to receive a name, 

 and suggest the above, which is appropriate, since the 

 evidence is remarkably conclusive that E. paniculata, Sm. 

 and E. hemiphloia, P.v.M. are its parents. 



It was originally found in Bray's Paddock, Concord, near 

 Sydney, where I knew of six trees until recently, but build- 

 ing operations may soon exterminate these particular 

 specimens. 



Dr. J. B. Oleland has drawn my attention to a tree on 

 Milson Island, Hawkesbury River, (a short distance west 

 of the Railway Bridge) which appears to be identical with 

 that from Concord. E. paniculata, Sm. is common on the 

 Island, but there is no E. hemlphloia; this suggests that 

 the hybrid originated elsewhere than on Milson Island. 



E. hybrida may be described as follows : — 



An erect tree of about 50 feet high, the tips of the branches 

 smooth, the butt with a sub-fibrous (peppermint-like) or flaky-fibrous 

 and more or less flat-corrugated bark, greyish or blackish extern- 

 ally, hence some trees have been described as "Black Box." 



Timber pale-coloured, hard, interlocked, and probably valuable. 



Juvenile foliage not seen in the strictly opposite state, but as 

 seen, not different from the mature foliage except in width. 



Mature foliage. Lanceolate or broadly lanceolate, slightly 

 falcate, acuminate, commonly 8 to 12 cm. long. Dull green, the 

 same colour on both sides, rather thin and tough, lateral veins 

 spreading, tine, the intramarginal vein not far removed from the 

 edge of the leaf, oil dots not numerous. 



Flowers. Peduncles of moderate length, angular, usually in a 

 short corymbose panicle, each with about 3 to 6 or sometimes more 



1 Op. cit., xxx, p. 498, (1905). 



