FROM THE COROLLA. 451 



The X indicating the position of the petalodes. 



A still more singular case is that of a variety of the 

 Gloxinia, described originally by Professor Edouard 

 Morren/ but which is now becoming common in 

 English gardens. When first observed these flowers 



Fia. 213. Gloxinia, with siipemumerai'y segments on the outside of 

 the true corolla. 



were observed to produce petaloid segments outside 

 the ordinary corolla, and partially adherent to (or 

 rather, not completely separated from it) much as in 

 the azalea before mentioned, the outer siu'face being 

 brightly coloured, like the inner surface of the corolla 

 in ordinary gloxinias. Being encouraged and tended 

 by gardeners, in course of time, instead of a series of 

 petalodes, more or less distinct from one another, a 

 second corolla or " catacorolla " was formed outside 

 the primary one, so that a hose in hose flower was 

 produced, but, in this case, the supplementary flower 

 was formed on the outside and not within the ordinary 

 corolla. Moreover, the disposition of the colour was 

 reversed, for in the outermost corolla the richest hues 

 were on the outer surface, while in the inner or true 

 corolla they were on the inside. 



* Bull Acad. Belg.,' t. xix, p. 224. tab. i ; and ' Gardeners' Chronicle/ 

 1865, p. 865. 



