which appear to be dioecious. (,<»;, 



ihlr 



My observations have not been sufficiently extensive to i m 

 me to say whether this lengthening of the pappus i^ a wen un- 

 usual occurrence; but I suppose it to be ><> from the following 

 remark of M. Cassini, the universal applieation of which must 

 be modified by the fact which 1 have mentioned: M [/aigrette 

 ne prend aucun accroissement apres la rleuraison, menu- dans 

 le cas oft l'ovaire des synatherees grandit beaucoup apres eette 

 epoque*." 



The figures of these plants are not in general delineated with 

 sufficient attention to detail, to shorn whether tiny arc taken from 

 a male or a female specimen ; in some cases, however; there i- 

 little room for doubt, as in Professor Hooker's figure of C/iicus 

 heterophyllus, to which I have already referred. 



Cntcus palustris, English Botany, pi. 91 4, and Cfdem acanlhi 

 Flora Danica 1114, are certainly antheriferous plants. 



The figures of Cnicus arvettsii in the Flora Londinerms and in 

 English Botany, pL 975, are females; but the figure of Fabius 

 Columna in his Ecpkrasis, i. 4(>'. (the first probably ever executed 

 of this plant) is remarkable for its great accuracy, showing cleaHj 

 that it is a male : and exhibiting moreover the elongation of the 

 pappus in the female after flowering, by a cotoparatite new of 

 it as attached to a floret and to a seed: a circumstance unnoticed 

 by others, even where the seed has been delineated with the 

 pappus. 



* Journal de Physiqtie, tome lxxxv. p. 17. 



XXVIf. The 



