DR. F. MUELLER ON AUSTRALIAN ACACIJE. 115 



names, adding his manuscript ones for the purpose of reference, 

 and retaining his characters as completing our previous knowledge 

 of the plants. The following general observations by Dr. Mueller 

 were contained in the letter to Sir W. Hooker, which accompanied 

 this paper. — Gr. B.] 



The Uninerves, although comprising such a large array of species 

 in the southern latitudes of Australia, are exceedingly rare within 

 the tropics. Indeed, only two desert plants of wide range, A. 

 Sentis (doubtfully combined by Mr. Bentham with A. decora) and 

 A. salicina, Ldl., accompany some of their usual companions as 

 far as North Australia ; and only a solitary new one, allied to 

 A. elliptica, was observed in the Grregorian journey. Those of this 

 group, which extend to subtropical latitudes in East Australia, are 

 for the greater part identical with southern forms (for instance, 

 Acacia falcata, penninerms, suaveolens, oleifolia) ; still A. podalyri' 

 folia and A. prominens, from Moreton Bay and Wide Bay, are 

 not to be found in Australia Felix. The plant referred by Mr. 

 Bentham, in the 'Linnaea,' to the last-mentioned species, is as- 

 suredly distinct, and probably A. lunata, Sieber. A new species, 

 of this section, allied to A. vestita, seems to be restricted to the 

 warmer parts of the east coast, while my southern collections 

 exhibit three other unknown kinds. I feel very reluctant to com- 

 bine our common A. reclinata with what I assumed to be A. 

 leprosa, which is with us a rare species, occurring towards the 

 sources of the Yarra. Unfortunately, many kinds ripen the fruits 

 so rarely, that one of the best specific characters for distinction in 

 this genus also remains often beyond avail. A. imhricata, from 

 Spencer's Gulf, belongs to the Uninerves, not to A. conferta 

 amongst Brimioidece, which I noticed near Wide Bay. The 

 habitat " Ponindi," mentioned under A. vernicijlora in the ' Lin- 

 nsea,' vol. xxvi., belongs to A. dodonccifolia, Bauer having, no doubt, 

 collected it on the very spot, near Port Lincoln. A. salicina is 

 remarkable for the scarlet arillus which surrounds the seed, — a 

 character in which, as far as I know, only A. melanoxylon partici- 

 pates. Acacia gladiiformis and A. haheoides seem combinable. 

 Nearly related to them is A. notahilis, a desert plant of Spencer's 

 Gulf and Lake Torrens, but scarcely referable to A. obtusata^ 

 Sieb., a mountain-plant of East Australia. I venture also to 

 deviate from Mr. Bentham' s opinion when he unites A. microcarpa 

 (singular for the smallness of its fruit) with A. huxifolia ; for the 

 figure in Sir W. Hooker's ' Icones Plantarum ' seems to exliibit 

 something very different. 



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