DISPLACEMENT. 91 



So, too, the alteration from verticillate to spiral, or 

 vice versdf may take place without any other notable 

 change.^ This may frequently be seen in Rhodo- 

 dendrons. 



Displacement of the parts of the flower. This subject is 

 partly touched on in the chapters on solution, ad- 

 hesion, and in those on hypertrophy, elongation, 

 prolification, &c., so that in this place it is only requi- 

 site to offer a few general remarks, and to refer to 

 other sections for further details. Morren, in referring 

 to displacement of the floral organs, mentions an 

 instance in a Fuchsia, wherein the four petals in place 

 of being alternate with the sepals were placed in front 

 of them, owing to the adhesion that had taken place 

 between the petals and the stamens. He speaks of 

 this transposition as metaphery.^ The same author 

 also gives an account of the displacement of several of 

 the organs of the flower in CypHpedium. insigne, the 

 displacement being consequent, apparently, on a spiral 

 torsion proceeding from right to left, and involving the 

 complete or partial suppression of several of the organs 

 of the flower. The dislocation of organs in a spiral 

 direction led Morren to apply the term *' speiranthie " 

 to similar deviations from the usual construction. 

 Changes of this kind among Orrhidacece are by no 

 means uncommon ; the following may be. cited by way 

 of illustration. In a specimen of Oncidium cucuUatum 

 furnished me by Mr. Anderson, well known for his 

 success as a cultivator of these plants, there was, 

 associated with a cohesion of one sepal with another, 

 and probably dependent on the same cause, a dis- 

 placement of the sepals and petals so that all were 

 dragged out of place. This dislocation may be better 

 appreciated by the accompanying formula than even 



' 'Clos. Mem. Acad. Toulouse,' 5th ser., t. vi, pp. 51, 70. 

 ' * Bull. Acad, R07. Belg.,* xviii, part ii, p. 505, and vol. xvii, part i, 

 p. 196, and vol. xix, part i, p. 260. 



