IS EUCALYPTUS VARIABLE ? 317 



since Mueller's paper was published, we are able to recast 

 his list of examples. It will be found, however, that no 

 two botanists agree as to the sections in which to place 

 some of the species, and as further field-knowledge is avail- 

 able and we know more about variation of bark in the same 

 species, the same authority modifies his own lists. 1 



"1. Leiophloice — Cortex post delapsum strati supremi 

 undique hevis. (Vulgo, Flooded Gum trees, White Gum 

 trees, Blue Gum trees partim, Red Gum trees partim, 

 Yarra trees)." 



Smooth barks ("Gums " we call them). Examples are 

 E. hcemastoma, rostrata, tereticornis, lewcoxylon, vimin- 

 alis, Gunnii, metadata, latifolia,aspera, stellulata, coriacea, 

 saligna, Behriana, punctata, stricta, fasciculosa. 



"Hemiphloias — Cortex in trunci parte inferiore persistens 

 rugosus et rimosus, in parte superiore ramisque delapsu 

 strati superiores kevigatus. (Vulgo, Moreton Bay Ash, 

 Blackbutted gum tree, Box trees partim)." 



Half-barks, the barks of the lower part of the trunk 

 persistent and the upper part smooth. Examples are 

 E. liemiphloia, pilularis, bicolor, longifolia, melliodora, 

 amygdalina, dives. The Moreton Bay Ash (tesseiaris) is 

 better in section 3 or 6. 



" 3. Rhytiphloke — Cortex ubique persistens rugosus et 

 rimosus intus solidus. (Vulgo, Bloodwood trees, Box trees 

 partim, Peppermint trees partim)." 



With wrinkled persistent bark, rather solid. This is an 

 unsatisfactory group, including heterogenous barks. Mueller 

 intended it to include the Bloodwoods (corymbosa, eximia, 

 trachyphloia), also bieolor (which is better in 2) and E. 

 microtlieca; leptophleba, ferruglnea. Odorata, robusta, 



1 See Woolls, "On the classification of the Eucalypts," Proc. Linn. Soc. 

 N.S.W., (2) vi., 60. 



