SECT. I. THE FLOWER. 103 



already stated ; so that our best guide, after all that 

 has been said on the subject, is, perhaps, that of 

 analogy, which we are often obliged to content our- 

 selves with in cases even of greater importance. 

 Thus the flower of the Poppy has both envelopes, 

 the calyx and corolla. The flower of the Tulip has 

 but one. Which of them is it ? But the part that 

 is present in the Tulip resembles the corolla of the 

 Poppy, more than it does the calyx. The conclu- 

 sion therefore must be that it is a corolla. And if 

 there are cases in which the single envelope seems 

 to partake of the nature both of corolla and calyx, 

 there is no inconsistency whatever in supposing them 

 combined in one. 



After all there are cases in which even the rule of 

 analogy will not enable us to decide the question. 

 I may exemplify that of the White Lily, in which 

 the single envelope is at first perfectly green, and 

 similar by analogy to a calyx ; although it changes 

 afterwards to a beautiful white and assumes the ap- 

 pearance of a corolla. Hence the opinion of Jussieu 

 is not so unreasonable as it has been thought to be, 

 countenanced as it is by the above fact, or by simi- 

 lar facts, as also by the sanction of botanists pecu- 

 liarly well qualified to judge of its merits.* His 

 definition of the calyx ~j~ and corolla has indeed 

 been strongly reprobated by M'- Salisbury,^ a bo- 

 tanist well known for his acuteness of argument and 



* Brown on Proteacese. Lin. Trans, vel. x. pt. i. 



t Gen. Plant. Praef. J Lin, Trans, vol. viii, 



