160 



NATURAL HISTORY OF PLANTS. 



corolla is formed by five petals of imbricative or contortive aestivation, 

 of which four are in pairs alternate with the sepals, while the fifth 

 alone (fig. 213) answers to the interval between two sepals.' The 

 stamens, about twenty in number," are monadelphous ; their hy- 



pogynous filaments being united into one tube, as are the 

 connectives, which are slightly separated quite close to their apex by 

 more or less marked crenulations. On the outer surface of the sort 

 of collar thus formed by the androceum are applied the vertical, linear, 

 one-celled extrorse anthers, which dehisce by a single longitudinal 

 median cleft, whose edges spread and turn outwards.' The gynaj- 



coroUa. Tlio arninpement of the parts of this 

 flonil envelope in Cinnamosma rather seem to 

 indicate that it represents a corolla analogous to 

 that of the Klenarerr. 



' I'avek has observed (Joe. cit.) that these five 

 petals are arranged with regard to the sepals as 

 if of three allerniite petjds two had heconiu dcdu- 

 plicated, and compares this arrangement to that 

 seen in Jl<liaii(h<muin. 



'^ 1'ayku regarded them as ten hilocular 

 stamens— five opi)0»itc the iMitals, and fivo alter- 



nate with them. This view he, no doubt, based 

 on the fact that the dentations or crenations 

 borne at the summit of the androceal c-oUar 

 are usually ten in number, each corresponding 

 with the a\tcx of a connective. But it is ditficult 

 to admit this explanation when the whole number 

 of cells is o<ld, as often hapj)ens ; sometimes fifleen 

 or seventeen may Iw counU-d. 



* Tlie i)ollen is very much like that of Mii(jHulia, 

 fusiform, with a longitudinal cleft. (See Cvmj)te$ 

 jRendus, Lxvi. 700; AdaiuQiiia, viii. 167.) 



