218 MISSOURI BOTANICAL GARDEN. 



ous. Dahl saw the honeyless (?) flowers of E. Pankir 



visited by two birds — Charmosyna and Myzomela 



what purpose ? ] . In Aristotelia Maqui there are said to be 



bright yellow male flowers with two whorls of stamens and 



smaller physiologically female flowers with one whorl. In 



Chile Johow found the flowers industriously visited by 

 the honey bee. 



In New Zealand according to Thomson A. racemom 

 shows transition stages from hermaphrodite to purely 

 staminate or pistillate flowers. These are red and desti- 



f 



pal 



gests anemophily. A. fruticosa of the same region has 

 polygamous flowers which lack odor and nectar, but here 

 anemophily is doubtful. 



The unique form of the anthers and perianth in the 

 Elaeocarpaceae renders a fuller knowledge of their floral 

 ecology highly desirable. 



On the large, red flowers of Bixa, of the Bixaceae, 

 Ducke observed at Para the females of several species of 

 bees belonging to Centris, Euglossa, Bombus, Xylocopa, 

 Melipona, especially large species, and Halictm. 



o 





ECOLOGY OF SOLANUM-CASSIA TYPE . 



Fortunately our knowledge of the floral ecology of the 

 members of the Solanum-Cassia type is much fuller and 

 so it will not be so necessary to cite the special observa- 

 tions as it has for the Dilleniaceous type. 



Delpino divides the twelfth class (Apparecchi prensili) 

 of his biological classification of floral forms into two types, 

 " Tipo Boraginco " and " Tipo Verbascino." The first 

 of these is of very particular interest in this place since 

 the Solanum-Cassia type as limited in this paper is, so far 

 as observations and conclusions from analogy go, very 

 nearly synonymous with it. 



The Borago floral type is, according to Delpino, charac- 

 terized by pendulous or quasi-pendulous flowers. The lono- 



