termmatlon of leaves is meant fome particulari- 

 ty exclufive of their proper ftrufture, viz. place, 

 number, lltuation, direilion, and infertion. 



DIADELPHIA [a<V, Us, twice, & Ahx(piiy 

 frater, a brother] Clafs the feventeenth in the 

 fexual fyftem, comprehending thofe plants 

 which bear hermaphrodite flowers with two 

 fets of united Stamina; but this circumftance 

 mufl not be abfohitely depended on. They are 

 the PapUionacei of Tournefort, th^ Irregulares te- 

 trapetali of Rivinus, and the Leguminofa: of Ray, 

 The flowers are generally pendulous. This is 

 the mofl: natural of all the clafles. The clafli- 

 cal chara61:erifl:ics are thefe, viz. Calyx, 

 Perianthiim, monophyllous, campanulate, wi- 

 thering ; Bnfis gibbous, attached below to the 

 psdunculus, and obtufe at the top ; the brim, 

 qiuinquedentate, acute, eredl, oblique, unequal, 

 the lower odd denticle longefl:, and the upper 

 pair fliortefl:, and farther afunder ; the bottom 

 moifl: with a melleous liquor, inclofing the re- 

 eeptaculum. The Calyx, being of confequence in 

 determining the genera, merits particular atten- 

 tion. Corolla, papilionaceous, unequal, 

 whjofe peiala are difliingulflied in the following 

 manner ; Vexillum, a petal covering the reft, in- 

 cunjbent, larger, piano-horizontal, its unguis 

 inferted into the fuperior margin of the recepta- 

 G 2 culunit 



