256 FORMS OF THE COROLLA* 



enclosed in the calyx of the Primrose; and 

 the limb, limbiis, which is the horizontal 

 spreading portion of the same flower,/. 155. 

 Tiie aixalogous parts of a poljpetalous Co- 

 rollci, as in the Wall-flower or Stock,/. 156^ 

 are n imed the claw, imgitis^ /. 157 a, and 

 the border, lamina, b. 



The Corolla is infinitely diversified in 

 form in different genera, whence Tourne- 

 fort 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 vuU 

 garis, Engl. Bot, t. 297, and Gentiana 

 Fneumonanthe, t» 20 ; irregular when 

 otherwise, as the Violet, t, 6l9, 620, Dead- 

 nettle, f, 768, and Lathyrus, t. 805 and 

 " 1108. An equal Corolla, /. 156, is not 

 only regular, but all its divisions are of one 

 size, like those of the Primrose, t. 5, Cam" 

 pajiula, t. 12, or Saxifraga, t, 9; an un- 

 equal one,/. 158, is when some segments 

 are alternately smaller than the others, as 

 m-Butomus, /. 651, or otherwise different, 

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

 always necessary, in defining characters of 

 genera, to use these last terms, it being 



