Corolla 



107 



often highly coloured and possesses odour. If there be only 

 one coat present, as in the Anemone and Marsh Marigold, 

 whatever its appearance, it is spoken of as calyx. 



The corolla is either gamopetalous or polypetalous — 

 regular or irregular. 



If the petals are attached with the calyx beneath the ovary 

 (fig. 166, h), the corolla is said to be hypogynous; if the ovary 

 be superior, but the petals, instead of being inserted under it, 

 are attached upon the calyx, forming a ring round the ovary, 

 the corolla is perigynous (fig. 166, p). When the ovary is 

 inferior and the corolla springs from the top of it with the 

 calyx (fig. 166, e), it is epigynous. 



The corolla never remains to form a part of the fruit as the 

 calyx does sometimes. 



Fig. 180, — Unguiculate petal 

 of DianthuSf with toothed 

 lamina. 



Fig. 181. — Bifid unguicu- 

 late petal of Lychnis, 

 with ligule. 



Fig. 182. — Tubular co- 

 rolla from the disc of 

 the capitulum of Cen- 

 taiirea Cyanus 



Terms are also employed to describe the shape of the 

 eorolla, and of the individual petals. 



When the petals are broad above and form a narrow limb 

 below, as in the Pink (fig. 180) and Lychnis (fig. 181), they are 

 said to be unguiculate or clawed. 



When each petal is notched at its free edge, as in the Lychnis 

 (fig. 181), it is described as bifid. If there are several notches 

 it is toothed (fig. 180), or, if very much divided, fimbriated, 

 as in Dianthus plumarius. 



Again, the corolla may be tubular, as in the Bluebottle and 

 o;her composite plants (fig. 182); eampanulate or bell-shaped, 



