140 MK. G. BKNTIIAM 02^ MTRTACE.^. 



laleuca by single characters only. LamarcTiea^ \sith the habit of 

 several narrow-leaved large-flowered species, has the stamina! 

 bundles united in a single tube ; Conothamnus^ with opposite 

 leaves, lias the oA'iiles solitary in each cell of the ovary, as iu 

 JBemcforfia. These genera are only retained with a view to sim- 

 plify the generic character of Melaleuca. 



The subtribe of BKAuroKTiE,?:, differing from EuleptospermesB 

 in the erect anthers attached by the base, consists of the five 

 Australian genera Beattfoutia, Br., E-eoelia, Schau<, Phyma- 

 TOCARPUs, r. MuelL, Calothamkus, Labill., and Erem.^a, Lindl, 

 all well characterized and generally admitted, and therefore calling 

 for no special remarks beyond what are given in the * Flora Aus- 

 traliensis.' 



' Under the subtribe Eucaltpte.e we have brought together the 

 two Australian genera Anggphoba, Cav., and Eucalyptus, L'Her., 

 nearly allied to each other but perfectly distinct and never con- 

 founded with any other Myrtaceae. The first, a small genus, has 

 never been disputed since first separated irom Metros ideros. The 

 other, Eucalyptus^ which constitutes so large and valuable a por- 

 tion of the forest-vegetation of Australia, is at the same time the 

 most numerous in species amongvst capsular Myrtaceae. Like all 

 very natural genera, whilst it is readily defined as a whole, its 

 division into sections and species is exceedingly difficult, and at 

 present very inisatisfactory. The best characters which have been 

 found are enumerated and discussed in the * Elora Australiensis ;' 

 but a few words may here be added as to the genera proposed to 

 be separated from it. These are two — Mudesmia, Br., and Sym* 

 pliyomyrtus^ Schau. The former was distinguished by the promi- 

 nent teeth of the calyx and the tetradelphous stamens ; and if these 

 characters had proved constant and tolerably well defined, the se- 

 paration would have been fuUy justified according to thepriuciplcs 

 upon which other capsular genera were at that time distinguished- 

 The claws, however, of the staminal bundles are in the original 

 Eudesmia tetragona, Br., so broad and short as to be at best 

 scarcely more than slight dilatations of the staminal disk ; and m 

 some specimens the tctradelphy is scarcely perceptible, and the 

 teeth of the calyx are often not more prominent than mEucalyp- 

 tns glohulics and some others; whilst in the species of Eucalypt^^^ 

 closely allied to E. tetragona, we have two {E. erythrocorys, F. 

 Muell., and E. eudesmioides^ F. IVIuell.) in which the tetradelphy 

 is more prominent, but the calyx-teeth scarcely perceptible ; lU 

 another, E. odontocarpa, F. Muell., the calyx-teeth are prominent 



