22 DIFFERENT STRUCTURES OF COROLLA. 



Holosteum and Hypecoum ;...four, as in Lychnis or five, as 

 in Reseda. 



The variations of the corolla, in respect to Figure, will include 

 what also concerns its Equality, and its Margin. 



In respect to Figure, it is either undulate, waved, as in Glorio- 

 sa plicate, folded, as in Convolvulus ;...revolute, rolled back, 

 as in Asparagus and Medeola ;...or tort, twisted, as in Nerium, 

 . Asclepias, and Vinca. Its more considerable variations, in re- 

 spect to figure, have been already shown in Chap. III. 



In respect to Equality, it is either equal, as in Primula \ un- 

 equal, as in Butomus ; ...regular, as in Aquilegia ; ...or irregular, 

 as in Aconitum and Lamium. 



In respect to its Margin, it is either crenate, notched, as in Li- 

 Kum y . . .serrate, sawed, as inTiLiA and Alisma ;...ciliate, fringed, 

 as in Ruta, Menyanthes, and Tropjeolum denticulate be- 

 tween the segments ; that is, having a denticulus, or little jag, at 

 the bottom of the divisions, as in Samolus and Sideroxylum 

 or with a hairy surface, as in Menyanthes and Lasianthus, a 

 species of Hypeiuum. 



In respect to Proportion, it may be very long, as in Cates- 

 bjea, Siphonanthus, Brunsfelsia, and CRANioLARiA;...or very 

 short, as in Sagina, Centunculus, and Ribes. 



In respect to Situation, the base of the corolla is usually close 

 to the perianthium, if there be one. It is, indeed, separated 

 from it by the germen, in Adoxa, Sanguisorba and Mirabilis j 

 but these instances are very rare. 



In respect to Duration, it is either persisting, lasting till the 

 fruit is ripe, as in Nymphs a caducous, dropping as soon as the 

 flower is blown, as in Act^ea and Thalictrum deciduous, drop* 

 ping off with the flower, which is the most common ;...or marces- 

 cent, withering, but not falling, as in Campanula, Orchis, Cu- 

 cumis, Cucurbjta, and Bryonia. 



