Svensk Botanisk Tidskrift. 1920. Bd. 14, H. 2—3. 



PRELIMINARV NOTES ON POLLEN DEVELOP- 

 MENT IN TROPICAL MONOCOTYLEDONS. 



BY 



BJ. PALM. 



Recent publicalions by Guignard, Farr, Samuklsson, Täckholm 

 and SÖDEUBKRc; a. o. show that a reawakened inlerest is laken in 

 Ihe morphological features of pollen development in Angiosperms. 

 The resulls thus" far accpnred seem verv promising for a belter 

 understanding of some phylogenelic and syslemalical problems, 

 especially in Ihe monocolyledons. As lill noNV, hoNvever, onh' a 

 comparalively small number of families and species have been in- 

 vestigaled wilh regard to the morphology of pollen formalion, very 

 much sllU bas lo be done, inosl perhaps in Iropical forms. 



During a prolonged stay in Java I have had the opportunity to 

 investigate members of various monocolyledonous families. Some 

 short noles will be given below of the recorded species; the full 

 account will be published laler togelher witli Ihe data of macro- 

 spore and endosperm development. 



Wilh regard to the nomenclalure of the cylokinesis I have 

 followed that of Farr (191G). 



Butomaceae. 



As in olher members of Ihe above family 



Limnocharis flava 

 shows a very regiilar successiv bipartilion. 



