76 



PRINCIPLES OF PLANT-TEEA.TOLOGT. 



and petaloid enations almost equalling the petals in 

 size.* The tubular enations are comparable to the 

 similar objects desci'ibed by Celakovsky in Narcissus. 



It is possible that this explanation may apply, not 

 only to the Priimda, but to all doubling where this is 

 due to serial dedoublement, for it is obvious that each 

 well-developed petal-like enation may itself repeat the 

 phenomenon by which it arose, and so on, until a large 

 number of such structures would be formed. Masters 

 figures in his paper such a series of enations. 



__.jC6 



ec 



Fig. 91. — Qnaphalium Leontopodium (Edelweiss). Female flower 

 showing extra outer corolla (co') in form of «■ pappus, (After C. 

 de GandoUe.) 



C. de Caudolle observed a unique case in the edel- 

 weiss (Leontopodium aljnntim. (i nivale) ; in some female 

 and hermaphrodite florets there was an extra inner set 

 of pappus-hairs united mostly in bundles, and attached 

 along the sutures (/. e. alternathig with the petals) of 

 the corolla for varying heights, some adnate to its 

 whole length (fig. 91) ; in the hermaphi'odite florets 

 the extra pappus-hairs had the character, not of the 



* An explanation of the dorsal enations of Primula, etc., along the lines 

 of extrorse anther-structure, is given elsewhere. 



