STRUCTURE OF FLOWERS. Ill 



but which must be considered as a Spiral /Estivation, 

 seeing that their margins do not overlap. The bundle of 

 stamens oilnga Zygia presents also an extremely distinct 

 and extraordinary spiral torsion. Several styles, espe- 

 cially in the LeguminosEe, are rolled crossways upon 

 themselves, or spirally upon the same plane, so as to 

 resemble the disposition of circinnate leaves, and to 

 deserve the name of Circinnate ^Estivation; for 

 example, the style of Sabinma. 



Section XIII. 

 Of Flowers united together. 



Among the causes which tend to conceal the true 

 symmetry of flowers, there is one which, although very 

 accidental, deserves to be mentioned ; I speak of the 

 union of neighbouring flowers. 



Sometimes two neighbouring peduncles are united so 

 intimately, that they appear to make but one, terminated 

 by two flowers : this happens naturally in the section of 

 the Honey-suckles which have two-flowered peduncles ; 

 it happens accidentally in several trees, such as the 

 Cherry, Apple, (PI. 21, figs. 1, 2,) &c, and in Centaurea 

 (PI. 21, fig. 3). 



Not only can the pedicels be united, as in the pre- 

 ceding case, but two or more neighbouring ones may be 

 so as to form but one, which then presents more or less 

 evident traces of this union. I have remarked this 

 phenomenon very clearly in certain plants of Galeopsis, 

 where the summit of the stem was abortive, and where 

 was found a terminal flower formed by the union of two 



