42 • GENERAL REMARKS ON THE 



There is no species of Proteacese common to the east 

 and west coasts of New Holland, and certain genera 

 abound at one extremity of the principal parallel which at 

 the opposite extremity are either comparatively rare or en- 

 tirely wanting. 



I have formerly remarked that in this order no instance 

 of deviation from the quaternary division of the perianthium 

 has been observed ; a fact which is the more remarkable 

 as this is itself a deviation from the prevaiUng quinary 

 number in the floral envelopes of Dicotyledonous plants. 



There is a peculiarity in the structure of the stamina of 

 certain genera of Proteacese, namely, Simsia, Conospermura, 

 and Synaphea, in all of which these organs are connected 

 in such a manner that the cohering lobes of two different 

 antherae form only one cell. 



Another anomaly equally remarkable exists in Synaphea, 

 the divisions of whose barren filament so intimately cohere 

 with the stigma as to be absolutely lost in its substance, 

 while the style and undivided part of the filament remain 

 perfectly distinct. 



SANTA LACE Jl]. I have formerly^ proposed and at- 

 569] tempted to define this natural order, one of whose most 

 remarkable characters consists in its unilocular ovarium, 

 containing more than one, but always a determinate number 

 of ovula, which are pendulous and attached to the apex of 

 a central receptacle. This receptacle, which varies in its 

 figure in the different genera, in some being filiform, in 

 others nearly filling the cavity of the ovarium, had not been 

 previously noticed in any plant of the order. 



The greater part of the Santalaceee of Terra Australis 

 are found in the principal parallel, to which several genera, 

 namely, Leptomeria, Corethrum, and Fusanus, are nearly 

 limited ; Santalum, on the other hand, is found chiefly 

 within the tropic. 



I have added Exocarpus and Anthoholus to this order, 

 with certain genera of which they agree in habit and many 

 points of structure, both of the flower and fruit ; but they 



' Froflr.fi. Nov.. Boll. 350. 



