THE DEHISCENCE OF ANTHERS BY APICAL PORES. 227 





genera Melipona 



A 



I am inclined to be- 



lieve that in Monochoria we have a highly developed pollen 

 flower, connected by various stages with other members of 

 the family showing a deep nectar bearing tube. 



In the Liliaceae, all forms of which, with the exception 

 of the aberrant Odontostomum , belong to the Solanum- 

 Cassia type, zygomorphy is not so pronounced as in several 

 other families, the Amaryllidaceae for instance, appar- 

 ently only Agrostocrinam having a zygomorphic habit. 

 The flowers are all of a good size and usually highly colored, 

 the anthers quite often in sharp contrast with the perianth, 

 Thomson states that Luzuriaga parviflora has white, 

 fragrant pollen flowers ! Delpino considers 



D 



Sola 



Borag 



In the Amaryllidaceae, direct observations are wanting, 

 but the zygomorphic condition of Zephyra and Tecophilea 

 and especially of Cyanella indicate ecological relations 

 similar to those of the zygomorphic Solanums or Cassias. 



Nothing is known of the ecology of the two representa- 

 tives of the Pittosporaceae considered, but their structure 

 is so similar to species which are well studied biologically 

 that there can be little doubt as to their insect visitors. 

 The little that is known of other genera indicates a wide 

 difference in the insect relations of the typical and the aber- 

 rant members of the family. 



The Tremandraceae are doubtless entirely dependent 

 upon pollen-collecting bees for cross fertilization. This 

 cannot be said with the same confidence of the Sterculiaceae 

 considered above, but from the structure of some of the 

 forms it seems not improbable that they are visited and 

 pollinated in the same manner as Solarium or Borago. 



Gilg considers that in the absence of direct observation 

 it is to be assumed without question that the flowers of the 

 Ochnaceae are insect pollinated. The magnificent flowers 

 the zygomorphic disposition of the anthers in some species, 



