158 



PRINCIPLES OF PLANT-TERATOLOGY. 



Chronicle,' was also examined, in which each perianth- 

 segment bore a distinct bilobed portion of corona 

 (corresponding to the bilobed basal part of the 

 versatile anther) ; in the case of one such bilobed 

 individualized portion of the corona, each lobe had on 

 its inner margin an infolded portion, ad n ate to the 

 upper surface of the corona for some distance below 

 the point of union of the lobes. Such a bilobed 

 corona-segment attached to one of the perianth- 

 segments clearly, therefore, represents a transitional 



Fig. 125. — Narcissus Pseudo-narcissus var. Perianth segment ( p) 

 with its bilobed corona-segment (co), showing transition to anther- 

 structure. Semi-diagrammatic. (From 'New Phytologist.') 



structure between two basal anther-lobes of the versa- 

 tile anther, of which the perianth-segment represents 

 the wanting apical part (fig. 125). 



The true morphological nature of the corona would 

 seem, from these abnormalities, to be now clearly 

 elucidated. 



But the point of chief interest has yet to be men- 

 tioned. In the flowers from whose structure Cela- 

 kovsky deduced his remarkable conclusions it was the 

 petaloid stamens which exhibited the transitional con- 

 ditions of the corona, and from which he further 

 deduced the stamina! origin of the perianth. In the 

 flowers above described it was the staminoid petals 



