Mr. Brown, on the Proteacee of Jussieu, 38 
them from that remarkable section of the genus, which I have 
at- present united with them and called Cycloptere. Its length 
also, when compared with that of the calyx, seems in some 
cases to be of importance, as in distinguishing Adenanthos from 
Spatalla; but in general this circumstance can hardly be had 
recourse to except in specific characters. 
The form of the st1iGMa is in many cases of considerable im- 
portance in characterizing genera, a fact which could not escape 
the penetration of Dr. Smith when establishing his new genera 
of this order: thus its conical papilla in his Conchium (the Hakea 
of Schrader) will in many, though certainly not in all cases, 
distinguish it from Grevillea: but its form in both these genera will 
readily serve to separate them from Xylomelum and Rhopala; and 
thus also Spatalla remarkably differs from Adenanthos. Upon the 
whole, however, it seems that its obliquity is of greater import- 
ance than its form; for this, when existing in any great degree, 
is generally accompanied with a corresponding irregularity in the 
calyx: but as this irregularity is produced for the purpose of 
bringing all the antherze into contact with the stigma, so its obli- 
quity in the dioicous genera Leucadendron and Aulav is not at- 
tended with so great a degree of irregularity, which would here 
serve no end, impregnation depending on the pollen of different 
individuals, to insure which the surface of the stigma in these 
genera is rough with papule; a circumstance that, together 
with its — readil y a them from all others of the 
order. - 
In — the inigi or summit of the sie inosculates 
with the divisions of the barren filament, which in some species 
appear beyond it in horn-like processes, but in others are en- 
tirely lost in its substance. I am acquainted with nothing like 
this in the whole vegetable kingdom; and such a singularity 
‘VOL, X. F 2 alone, 
