200 DISTINCTIONS BETWEEN 



dium, Engl. Bot. t. 1033, and 1721 4, and the na- 

 tural relationship of this genus to Polygonuw, t. 1044, 

 989, 756, &c., leads us to reckon the same part in 

 the latter a coloured calyx. On the other hand, when 

 the part present is delicate and finely coloured, like 

 the generality of Corollas, we denominate it such ; 

 more especially if the plant to which it belongs be allied 

 to others that have a Calyx besides, as in Tulipa, 

 t. 63, allied to Leucojum, t. 621, which has a Spatha. 

 The great Jussieu denominates this part in the Tulip 

 and other liliaceous plants, however beautiful, a Calyx. 

 His definition of a Corolla is " that covering of a flower 

 which is invested with the Calyx, being very rarely 

 naked ; a continuation of the innner bark of the flower- 

 stalk, not of its cuticle; not permanent, but mostly 

 falling off from the stamens ; surrounding or crowning 

 the fruit, but never growing united with it ; and having 

 its parts or segments for the most part alternate with 

 the stamens, which are equal to them in number." 

 By this rule the tube and six segments of a Narcissus, 

 t. 17, 275 and 276, constitute the Calyx, and then 

 surely what Jussieu calls a Crown, f. 1476, and Lin- 

 nasus a Nectary, must be allowed the name of Corolla. 

 On the other hand, the Spatha becomes a Bractea* 

 Consequently the whole order of Liliaceous flowers in 

 general have a coloured Calyx only, which seems 

 hardly admissible ; and yet I cannot conceal a recent 

 discovery which strongly confirms the opinion of my 



