20 FRUCTIFICATION, OR FLOWER AND FRUIT. 



in the same tribe, for the fleshy external coat, 

 or case, of several kinds of Puff-ball, and those 

 Agarics which constitute Persoon's genus of 

 Amanita. See fig. 129, a. and b. 



54. Corolla, the Corolla, or inner integument of a 

 Flower, generally more dilated, delicate, and co- 

 loured, than the Calyx, is not always present. 

 This organ is supposed to perform some function 

 with respect to air and light, analogous to that of 

 the Leaves ; but limited to the use of the more 

 essential internal organs. It consists frequently 

 of two distinct parts, the Petal and the Nectary. 



55. Petalum, the Petal, is either one or more, regu- 

 lar or irregular; equal or unequal; transient and 

 deciduous, or withering and permanent; variously 

 coloured ; often fragrant; frequently bearing honey, 

 without any particular apparatus, or Nectary (57). 



56. A Corolla of one Petal, or piece, is called mo- 

 nopetalous; one of several, polypetalous. The 

 base of the former is named Tubus, the Tube ; the 

 spreading part, variously divided, the Limbus, or 

 Limb. The base of each Petal, in a polypetalous 

 Corolla, is the Unguis, Claw ; the expanded part 

 the Lamina, Border. The more or less hollow, or 

 dilated, part, within the mouth, (or eye as it is 

 sometimes called,) in both, is denominated Faux, 

 the Throat, and is either open and pervious, or 

 closed with hairs, scales, or valves. 



57. Nectarium, the Nectary, secretes or contains ho- 



