" iv. Fachyphloice. — Cortex uhique persisteus rugosus iutus fibrosus. 

 (Vulgo, string-ybark trees.)" 



" Stringybarks," with persistent, fibrous barks. A good natural group, 

 including engenioides, capitellata, macrori'hyncha, ohliqiia , i)ilulai'is var. Mueller iana, 

 tetrodonta. 



" V. SchizoiMoke. — Cortex ubique persisteus profundc sulcatus intus 

 solidus. (Vulgo, ironbark trees.)" 



" Ironbarks," witli hard, deeply-furrowed barks. Perhaps the best of all the 

 groups. Examples — E. siderophloia, paniculata, crehra, sideroxylon, melanoj^hloia. 



" vi. Lepidophloia;. — Cortex saltern in trunco persisteus lamellaris 

 friabilis. (Vulgo, melaleuca gum trees, mica trees.)"* 



With persistent bark on the trunk only, and forming scaly separate pieces. 

 Mueller's examples are m'miata {aurantiaca), phcenicea, peltafa {melisaiodora), to 

 which I would add iesselaris. The Rev. Dr. Woolls {Proc. Linn. Soc. N.S. W., vi, 

 709) ignores section vi, and it certainly cannot be separately maintained as a section. 



The cortical classification separates trees that are closely allied, e.g., hemiphloia 

 and Bauenana, the first being a half bark, and the latter having rough bark to the 

 branchlets. Similarly E. piluhiris in its normal form has smooth branchlets, while 

 its variety Muelleriana has rough branchlets. It places in juxtaposition those that 

 are not closely related, as will be observed from the examples given under each 

 section. Prominent examples are : — 



{a) E. 2)«nici(lat((, Sm., and. E.fasclculosa, T.Y.M. ; and 



(6) E. sideroxylon, A. Cunn., and E. leucoxylon, F.v.M., respectively, nearly 

 alike in leaves, flowers, and fruits, but utterly dissimilar in bark and wood. 



Absolute anomalies as regards barks are those of ironbark for E. stellidatn, 

 Sleberiana, and. viminalis ;-[ a box-like bark for E. terelicornis, and. ohsevvers will 

 note many other anomalies within their own experience. At the same time, in 

 careful hands, the bark is the most useful character tlie forester can employ. 



Timber. — While the character of a timber is a matter of economic 

 importance, its use in botanical diagnosis is very often overlooked. Por many years 

 I have insisted on the examination of tlie timber wherever possible, and recognition 

 of this character has undoubtedly led to a better understanding of the genus. 



• The meaning of this, which is not (juite clear as it stands, is explained by the following passage : — " The bark of 

 both is very lamellar and friable, outside of a yellowish or greyish-brown, on fracture p.iitly glittering, and sonjiwhat 

 resembling mica-schist." (Eucalyplogi-aphia, under E. jiltifiiirea.) 



t See Luehmann, 0]>. cit., page 521. 



