24 



CUilESlON 



in which one of the petals had the form of a cup sup- 

 ported on a long stalk. This cup-shaped organ was 

 placed at the back of the flower, and had the dark 



Fio. 9. Eranthis hyemalis. Ti-ansition from flat sepal to tubular petal. 



colour proper to the petals in that situation. I have 

 seen a petal of Clarkia similarly tubular, while some of 

 the cultivated varieties of Primula amensls exhibit 

 tubular petals so perfect in shape as closely to re- 

 semble perfect corollas. 



Like the petals, the stamens, and even the styles, 

 assume a hollow tubular form. This change of form 

 in the case of the stamens is, of course, usually attended 

 by the petaloid expansion of the filament, or anther, 

 and the more or less complete obliteration of the pollen 

 sacs, as in Fuchsias, and in some double-flowered 

 Antirrhinums.^ So also in some semi-double varieties 

 of Narcissus poeticuSj and in Aqidlegia. By the late 

 Professor Charles Morren, this affection of the stamens 

 and pistils was called Solenaldie^- but as a similar con- 

 dition exists in other organs, it hardly seems worth 

 while to adopt a special term for the phenomenon, as 

 it presents itself in one set of organs. 



In many of these cases it is difficult to say whether 

 the cup-like or tubular form is due to a dilatation or 

 hollowing out of the organ affected, or to a fusion of 

 its edges. The arrangement of the veins will in some 



' ' Report of Intemat. Bot. Congress,* London, 1866, p. 131, tab. 

 vii, figs. 10-13. 



' Bull. Acad. Roy. Belg.,' t. xviii, 2nd part, p. 179. 



