The Morphology of the 'Corona' of Narcissus

1914 Annals of Botany  
A S a result of the recent investigation of two unusually interesting >• abnormal flowers x of Narcissus Pseudo-narcissus var. tridymus, De Graaff, I have been able to confirm the conclusions arrived at by Celakovsky* (as a result of his study of abnormal flowers of N. Tazetta) with regard to the morphological nature of the ' trumpet' or ' corona'. In my flowers the three sepals were normal, save for the complete absence of any corona. The androecium and pistil were also normal. The three
more » ... were all partially transformed into stamens, and it was owing to this fact that, as it so happened, the nature of the corona became revealed in its true light The corona of each petal was bilobed and was confined to these members of the flower, the sepals, as above stated, being devoid of it. As each petal had its own individual corona, it is obvious that the normal corona had become completely split up. In both flowers the corona of each petal was seen to be an intermediate structure between a petaloid ligular outgrowth from the upper surface of the petal, on the one hand, and the basal lobes of the versatile anther on the other\ in just the same way as the organ bearing it was an intermediate structure between a petal and an anther. In the case of one petal the corona lobes were obviously direct downward extensions, in petaloid form, of the anther lobes, while at the same time . continuous on their outer margin with the normal .ligular outgrowth from the petal; and the presence of this marginal petaloid portion of the corona was a result of the presence of the corresponding marginal petaloid portion of the upper portion of the anther (Fig. i) . This was, perhap3, the best case for demonstrating the absolute oneness of the anther lobes with the corona, the texture and colour of the normal corona being always present. In another petal, besides the downwardly directed narrow
doi:10.1093/oxfordjournals.aob.a089521 fatcat:fvrgus42hvgwtpdxj52m54hhde