

228 MISSOURI BOTANICAL GARDEN 



especially the peculiar condition of the anthers connate in 

 masses in Luxembergia , and the pleasant odor observed for 

 others (the odor of violets in Schuurmansia Henningsii) 

 all speak strongly in favor of this conclusion. Visitors are 

 recorded for but one species. Ducke observed Xylocopa 

 barbata visiting the flowers of an unidentified Ouratea. 



Of the method of pollination of the Dipterocarpaceae we 

 know nothing, and can only surmise from the structure of 

 the flowers. The same is true of the Flacourtiaceae under 

 consideration. 



Nectar has never been demonstrated in the showy but 

 usually odorless flowers of Begonia. Warburg noticed 

 numerous small insects visiting the flowers in their native 

 habitat. On an undetermined Javan species Knuth ob- 

 served Apis, Bombus and Podalirius (presumably col- 

 lecting pollen.) 



Of the Myrsinaceae and Loganiaceae in question we 

 know nothing. 



Mr. J. C. Willis, Director of the Royal Botanic Gar- 

 dens, Peradeniya, kindly sends me the following note on 

 jExacum of the Gentianaceae : "The only Melastomaceae 

 I have actually seen pollinated yet are our common big 

 pink Osbeckias, which are visited by the big carpenter bee, 

 Xylocopa, sp., apparently for pollen. The bee pollinates 

 our big blue Exacum macranthum , which looks just like 

 a Melastomacea. It squats down oh the flowers and 

 bunches up the stamens with its legs, and must get lots 

 of pollen jerked out of the apical pores onto its body. 

 In fact I have usually found flowers visited by it to have 

 the stigmas well pollinated, and have hardly ever seen any 

 other insect visit them at all. There is little or no honey, 

 so far as I have noticed, in these flowers or in those of 

 Melastomaceae . ' ' 



Solanum has been discussed above. I have been able 

 to examine one species of Cyphomandra in a living condi- 

 tion. There appears to be no free nectar. The walls of 





