SUBSTANCE, &C. OF LEAVES. J 71 



bryanthcmiun acinaciformc above-men- 

 tioned. 



Bolabriforme, hatchet-shaped, compressed, 

 with a very prominent dilated keel, and 

 a cylindrical base, as M. dolabriforme. 

 Bill. Elth. t. 191, Curt. Mag. t. 32. 



These two last terms might well be spared, 

 as they seem contrived only for the plants in 

 question, and indeed are not essentially di-* 

 siinct from each other. 



Trigonwn, three-edged, having three lon- 

 gitudinal sides and as many angles, like 

 M. ddtoides, Bill Elth. i. 195, Linn. 

 Phil Bot. t. 1. f. 58. Linnreus has 

 erroneously referred to this figure to 

 illustrate his term deltoides ; misled, as 

 it should seem, by the name of the plan J 

 to wlaich it belongs; but his definition 

 is foreign to the purpose, aee p. 155, 

 and alludes to the outline of a flat leaf. 



Triquetrum differs from trigomim only in 

 being used by Linnaeus for a three-sided 

 awl-shaped leaf, as M. emarginatum, 

 Bill Elth. t. 197, /. 250, and bko- 

 lorum, t. 2Q2, also Saaifraga burse- 

 riana. 



Tctragonum, four-edged, having four pro. 



