20 



Hybridism. — Dr. Trabut's E. gomphocornuta is a hybrid of which E. gompho- 

 cephala is undoubtedly one of the parents. I will return to the matter when 

 dealing with hybridism in the genus. 



RANGE. 



It is confined to Western Australia, and to that coastal strip of the south- 

 western portion of it parallel to the Indian Ocean and of the limestone formation, 

 and which, as regards the southern portion of it, contains the fine caves which have 

 been to a small extent opened to tourists. 



The actual range of Tuart country has been estimated at about 500 square 

 miles. 



Bentham quotes :— 



" Towards Cape Leeuwin, Gregory, Geographe Bay, Leschenault, Vasse 

 River, Oldfield, Swan River, Oldfield, Harvey, and doubtfully, Murchison River, 

 Old field." 



Mueller, however, quotes Oldfield as having got it north of the Arrowsmith 

 River, and he was a very careful collector. So that its range is from the Arrowsmith 

 River to the Leeuwin, but chiefly in the vicinity of Geographe Bay ; it is not found 

 at a great distance from the sea. 



AFFINITIES. 



Bentham places it in a section which includes E. gonlocalyx, E. incrassata 

 and grossa, and more particularly E. vernicosa, E. megacarpa and E. Preissiana. 



I will take cognizance of these species. 



1. With E. marginata Sm. 



Mueller, while pointing out that it is one of the most marked of species, adds, 

 " habitually not altogether dissimilar from E. marginata," a comparison I do not 

 understand. 



2. With E. megacarpa F.v.M. 



" It might systematically be compared to E. megacarpa if the broadness and 

 biuntness of the lid were kept out of view ; still the roughness of the bark, the 

 thicker consistence of the leaves, the heterogeneous stomates, the stamens mostly 

 straight in bud, the narrow anthers, the fruits longer than broad, with perhaps 

 never more than four valves, already offer marks for easy distinction." (Mueller, 

 " Eucalyptographia ") 



Bentham indicated the affinity at an earlier date. 



