160 



NATURAL HISTORY OF PLANTS. 



corolla is forniecl by five petals of imbricative or contortive restivation, 

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

 alone (ii«^ 213) answers to the interval between two sepals.' The 

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



Canella alba. 

 Fig, 211. 



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 gynse- 



coroUa. Tlic arrangement of the parts of this 

 floral envelope in Cinnamosma rather seem to 

 indicjite that it represents a corolla analogous to 

 that of the Ebenacete. 



' Payer has observed {loc. clt.) that these five 

 petals are arranged with regard to the sepals as 

 if of three alternate petals two had hpcome dedu- 

 plicatcd, and c'omj)ares this arrangement to that 

 seen in llelianthemum. 



2 Payer regarded them as ten bilocular 

 stamens — five opposite the petals, and five alter- 



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

 on the fact that the dentations or creuations 

 borne at the summit of the androceal collar 

 arc usually ten in number, each corresponding 

 with the apex of a connective. But it is difiicult 

 to admit this explanation when the whole number 

 of cells is odd, as often happens; sometimes fifteen 

 or seventeen may be counted. 



^ The pollen is very much like that of Magnolia, 

 fusiform, with a longitudinal cleft. (See Comptes 

 liendiis, Ixvi. 700j Adansonia, viii. 157.) 



