THE DEHISCENCE OF ANTHERS BY APICAL PORES. 



189 



trees, confined to Malacca and the Malay Archipelago) the 

 stamens of the species differ considerably in form, those 

 of one species being much broader than those of the other, 

 and possibly in dehiscence. 



JH stemonanthus (1 species found in Upper Guinea) is a 

 strongly zygomorphic form with only two fertile stamens, 

 clearly belonging here. 



(5 Aust 



) 



to Cassia and with almost identical floral structure except 

 that the stamens are reduced to two. 



Storckiella has the perianth quite widely patent and the 

 linear anthers of this type, but the elongate filaments make 

 it necessary to place it in the Melastomataceous type. 



Dicorynia (4 species in Guiana and North Brazil), with 



s 



linear-sagit- 



its two short, thick anthers, one of which is sometime: 

 eight-locellate at the tip, is a unique form, but one which 



seems best treated here. 



Baudouinia (2 species in Madagascar) has 

 tate, basifixed, apically acuminate and penicillate anthers, 

 both locules of which open at first by an introrse subapical 

 fissure which soon extends in two introrse longitudinal slits 

 to the base. 



In Duparquetia 



single 



species, a 



richly flowering 



shrub, in west tropical Africa) the flowers are, with the 

 possible exception of Krameria, the most strongly zygo- 

 morphic in this type. The four anthers dehisce by short, 

 terminal slits which are not continued down the side for 

 more than a third of the whole length of the anther. 



Martinsia (2 species in Brazil and British Guiana) is 

 one of the largest-flowered and most typical, slightly zygo- 

 morphic, representatives of this type. 



Krameria (23 species, distributed from warmer North 

 America to Chile), of somewhat uncertain systematic 

 affinities, is now placed next to the Cassieae in the Legumi- 

 nosae. Structurally it is the most aberrant form assigned 



