12 



NATURAL HISTORY OF PLANTS. 



Fig. 17. Flower (f). 



Fig'. 18. Long. sect, of 

 flower. 



anthers are bilobed at the summit, with the pore of dehiscence 

 situated at the bottom of the hollow separating the two lobes. 



rhijUagathis has also a capitate inflorescence (in reality formed of 



uniparous cymes), sur- 



Sonerila manjaritacea. rOUUded by aU iuvolucre 



generally formed of large 

 bracts. The flowers, 3, 

 4-merous and diploste- 

 monous, have a cam- 

 panulate receptacle and 

 sepals ciliate at the mar- 

 gin, sometimes with al- 

 ternate rigid hairs. The 

 cells of the pointed elon- 

 gate and sinuous anthers 

 separate from each other 

 at the base. 

 Bonsscauxia chnjsophyUa (fig. 19), a shrub of Madagascar, by itself 

 constitutes a small sub -series {Rousseauxiece) which forms a con- 

 necting link between Bertoloniece 

 and the following series, 'Oxysjwrece. 

 The flowers, collected in small ter- 

 minal cymes, are tetramerous, with 

 a campanulate receptacle, and 4 

 contorted ciliate sepals, 4 alternate 

 petals inversely contorted, and 8 

 nearly equal stamens, all formed of 

 an incurved filament and an elongate 

 flattened anther, held by its porricide 

 summit in a cavity between the re- 

 ceptacle and the ovary. The latter, 

 adhering thus for about half its 

 height to the internal coat of the receptacular sac, is 4-celled and 

 becomes a capsular fruit. 



Oxyspora, the name of which has been given to a sub-series 

 (Oxysporeoe), has flowers united in terminal, compound, ramified 

 clusters of cymes. They are tetramerous, with pointed and contorted 

 petals, eight stamens, four of which smaller and alternipetalous may 

 be wanting, whose anthers often have three very small basilar 



Rousseauxia chrysophylla. 



Fig. 19. Diagram. 



