THE NORTH-AUSTRALIAN EXPEDITION. 229 



a single Cunoniaceous plant existing, to my knowledge, in South Aus- 

 tralia, and, except Eremosyne, in West Australia), is further limited to 

 one single system of mountains. It will be no doubt hardy in England, 

 as it grows on the subalpine summit of Mount William in great luxu- 

 riance, and I have been always proud of this new commemoration of 

 the memory of the two Bauers, so that I hope, Sir William, you will 

 oblige me in giving publicity to that 'portion of my manuscript (sent 

 this time), in order to restore it to its honour again. 



The fine Carallia-tree seems to be well marked from the Indian 

 species, and is the only new contribution to Rhizophorea: gained by this 

 Expedition, being also seemingly very rare. That Ceriops, Bruguiera, 

 and RhizopJwra occur I have mentioned previously. 



On Composite I have only commenced to work, but transmit now a 

 paper on two new genera allied to Pluchea. 



TJmbelliferce become gradually a large Order in this part of the 

 world, particularly if we adnumerate Dr. Hooker's interesting contri- 

 butions from Tasmania. The North- Australian Expedition has yielded 

 the remarkable genus Hemicarpus, with three species, the teeth of the 

 obliterated mericarp of H. glandulosus being much shorter than in the 

 two other species, which requires a slight modification of my first out- 

 line of the genus, although it is otherwise not infringed, but rather con- 

 firmed by the third species. Didiscus takes its place at Moreton Bay, 

 where a sixth species (D. procumbens) occurs. But another new genus 

 has been obtained, of which you find a description as Platycarpidium ; 

 it is a tall bush, often twelve feet high, with polygamous flowers, near- 

 est related to Platysace. Only one of the six tropical or subtropical 



Hyd 



The gigantic herb of this 



Order, seen by Cunningham, we have not met with. 



If you can find, Sir William, an empty corner in your Journal for 

 the magnificent new Panax from Moreton Bay, which, on account of 

 racemose, not umbellate inflorescence, is very singular, I think this 

 plant will well deserve the place ; I call it P. polybotryus, and it flou- 

 rishes in the greatest profusion in the Sydney Garden. I saw it myself 

 in the wilderness, but not the Panax ? allied to P. arborescens and P. 

 Colensoi, found by Mr. Moore at Wide Bay. Could the latter be Leich- 



hardt's Sciadophyllum ? % . , 



Of Legundnos* I send this time only the two descriptions which es- 

 tablish t.h ft n ftW genera Brewsteria and Plagiotropi*. The former is 



