140 DE. FEBD. MULLER's BOTANICAL EEPOET 



Of natural orders, more or less extensively represented in the 

 extratropical parallels of Australia, none were noticed of the fol- 

 lowing beyond the tropic of Capricorn in a complex of lines of 

 exploration exceeding 5000 miles, and in an extent of 22° of 

 longitude and 9° of latitude ; viz. Banimculacecd, HydropeltidecB, 

 TremandrecB, Geraniacece, Mosacece, CallitricJiifiece, Crassulacece, 

 CunoniacecB, Mesemhryanthemew, Caprifoliacecd^ JEJpacrideee, Plan- 

 taginece, Iridecd, and JBLypoxidece. Besides these, none of the fol- 

 lowing were noted in North or North-western Australia, viz Ano- 

 nacecB, Aurmitiacece, Hippocratecd, ErythroxylecB, Xanthoxylece^ Ce- 

 drelece, AlangiacecB, JEscalloniea, Araliacece, Oleinece, Piperacece and 

 Aphyllanthacece : and these are foreign to North-western Australia 

 in addition to the former: — CrucifercB, Guttiferce, Oxalidece, Passi- 

 jiorecB^ JPrimulacecd, ScitaminecB, Juncece, Restiacece and JCerotidece. 



Amongst the plants remarkable for their geographical distri- 

 bution, the Grouty-stem tree {Adansonia Gregorii) is deserving of 

 particular notice, since this expedition proved its generic iden- 

 tity with the Baobab or Monkey-Breadtree of Western Africa, 

 which has hitherto remained the isolated representative of its genus. 

 The Australian species, resembling its prototype most strikingly 

 in the often colossal thickness of its stem and in its singular rami- 

 fication, is evidently restricted to the north-western part of this 

 continent, where Allan Cunningham assigned to it a range of 4° 

 of longitude, and where the same extent of latitude limits its 

 existence. The fruits, borne on a short stalk, contain a dry 

 acidulous pulp, similar to that of Adcmsonia digitata. 



Of two endemic kinds of Cochlospermum (Silk-cotton trees), 

 one was found to be a native only of North-western Australia, 

 whilst the other extended from around the Gulf of Carpentaria as 

 far as Porter's Range on the Burdekin. A species of Datura 

 (allied to D. alba of East India) is truly indigenous in the eastern 

 interior : a Calamus ranges as far south as Moreton Bay ; a second 

 species of the New Zealandian genus Teucridium occurs in the 

 hotter parts, of Eastern Australia; an un described Gossypium 

 (mentioned already by A. Cunningham) is dispersed throughout 

 the tropics of this country ; a third species of Fandanus indicates 

 generally the permanency of fresh water ; and the only indigenous 

 ^ciadophyllum seems to be analogous wdth ^c. macrostachyum of 

 New Guinea, and occurs, according to the observations of Mr. C. 

 Moore, as far south as Wide Bay. I may also draw attention to 

 the wide northern range of the following genera, known formerly 

 only from the extratropical zone of Australia ; viz. Seringia, Ke 



