MAGN0LIACE2E. 



155 



replaced in the genus Brimys, we usually, it is true, see only two 

 pluri-ovulate carpels, of which the ovules do not generally attain their 



Fig. 206. 

 Male flower. 



Drimys {Tasmannid) lanceolata. 



Fig. 207. 

 Longitudinal section of flower. 



full development. The number of petals varies ; there are some- 

 times half a score.' But in certain flowers there are only three or even 



Zygogynum Vieillardi. 

 Fig. 208. 



" two ; and this latter number is by far the most frequent in the 

 species thence named 1). dipetala"' 



^ In the cultivated plant certain flowers have 

 as many as twelve. The calyx when adult 

 forms a sac, and tears irregularly on anthesis. 

 We have been able to follow its development, 

 and have ascertained that when very young it is 

 represented by two or three short free leaves. 

 But soon a common membrane raises them to 

 form the sort of nearly closed sac we have de- 

 scribed. This is the usual mode of formation of 



a gamosepalous calyx. At the summit alone do 

 we find two or three unequal teeth, the signs of 

 the primitively distinct leaves. 



- F. MuELL., JV. Tli't.,\. 21; Benth., Fl. 

 Ausfr., 49, n. 2. — Tanmatmia dipetala W. Bu., 

 ex DC, Frodr., i. 78. — T. insipida K. Bu., e.^ 

 DC, Syst. Veg., i. 145. — T. monticola A. Kicu., 

 Voy. Aslrol.,'^0, t. 19. 



