196 MISSOURI BOTANICAL GARDEN 



tropical Africa, with 4 species in tropical America), and 

 Cotylanthera (3 species, saprophytic herbs, from Java, 

 Mariana Islands and the Himalayas). Chironia and Deia- 

 nira are interesting for comparison, though they can hardly 

 be included in the list. 



In the Gentianaceae the corolla is infundibuliform, hy- 

 pocrateriform, campanulate or sometimes rotate. In both 

 Exacum and Cotylanthera the corolla has a short, subglo- 

 bose tube with patent limb and stamens inserted in the 

 throat. A detailed comparison of the floral habit of these 

 genera with the other members of the family is precluded 

 by lack of space. Several genera approach the rotate co- 

 rolla characteristic of the Solanum-Cassia typo either by 

 way of a broadly campanulate corolla or by a hypocrateri- 

 forin corolla with a usually shortened cylindrical tube and 

 prominent patent limb. In some of these forms the sta- 

 mens are included while in others they are exserted, but 

 with short, versatile anthers on longer filaments. In some 



7 O 



cases the anthers are linear but versatile, while in others 



they are linear and basifixed. A few forms approach very 

 closely in their floral habit the two apically dehiscent 



genera. 



Solanaceae. 



In the Solanaceae, two forms are to be considered, Sola- 

 tium and Cyphomandra. Solarium (of about 970 nomi- 

 nal species 630 occur in Tropical America, 70 in extra- 

 tropical South America, 27 in tropical Africa, 10 in the 

 East African islands, 34 in the Indian, Malay and Oceanic 

 Island region, 26 in South Africa and 52 in Australia) is 

 too well known to require description: attention may 

 be directed to the few zygomorphic forms constituting 

 the section Nycterium, and to the considerable number of 

 species showing incipient stages of this characteristic, and 

 to the condition prevailing in the small section Lycopersi- 

 cum. In many of the species the pores are later continued 

 down the sides of the anthers, sometimes to the base, in 





