FORMS OF THE COROLLA. 



pound, as in the Rose, in which it is polypetalous, 

 of several. The Nectary is sometimes a part of 

 the petal, sometimes separate from it. 



A monopetalous Corolla consists of two parts ; 

 the tube, tubus, the cylindrical part inclosed in the 

 calyx of the Primrose ; and the limb, lirnbus, which 

 is the horizontal spreading portion of the same 

 flower, f. 155. The analogous parts of a polype- 

 talous Corolla, as in the Wall-flower or Stock,y. 156, 

 are named the claw, unguis, f. 157 a, and the bor- 

 der, lamina, b. 



The Corolla is infinitely diversified- in form in 

 different genera, whence Tournefort and Rivinus 

 derived their methods of arrangement. It is called 

 regular when its general figure is uniform, as in the 

 Rose, the Pink, the Columbine, Aquilegia vulgar is, 

 Engl. Bot. t. $97, and Gentiana Pneumonanthe, 

 t. 20 ; irregular when otherwise, as the Violet, 

 /. 619, 6*20, Dead-nettle, t. 768, and Lathyrus, 

 t. 805 and 1 108. An equal Corolla,yi 156, is not 

 only regular, but all its divisions are of one size, 

 like those of the Primrose, t. 5, Campanula, t. 12, 

 or Saxifraga, t. 9 ; an unequal one,J. 158, is when 

 some segments are alternately smaller than the 

 others, as in Butomus, t. 651, or otherwise diffe- 

 rent, as in Aquilegia, t. 297. It is by no means al- 

 ways necessary, in defining characters of genera, to 

 use these last terms, it being sufficient in general to 

 say that a Corolla is regular in opposition to one 

 o 2 



