49 8 



BOTANICAL GAZETTE 



[DECEMBER 



lancifolia may extend over several sj 

 finds the same to be true for Papy 

 instances do the diap] 

 one space. 



and Schwendener (30) 

 liquorum. Only in rare 



ragms of S. validus extend over more 



from 



polygonal cells with tiny air spaces at the corners, to stellate cells 

 with very much elongated arms. A study of S. validus, taken in 



connection with the reports of Duval-Jouve (9) 

 littoralis, and S. triquetrii, and of DeBary (6) 



Me yen (21) 



rpus type" as an appropriate term by 

 ;ms showing the peculiar arrangement 



of cells characteristic of these species. 



this typ 



arms 



These long narrow cells occur 



Fig. 1. 



seedling 



tical cells; cells are elongating in the direction of food current passing to meristem 



of two, three, four, or five, the usual number being four. 

 While the cells in a single group are all elongated in the same 

 direction, the different groups (with certain exceptions to be noted 



Duval- Jouve (g) 



ig in different 

 lancifolia has 



ragm, except that the cells are in 



ifolia 



however, does not agree with the statement) 

 folia and Alisma Plantago resemble 5. lai 

 paper (10) he states that the diaphragms ir 

 grasses" have cells in groups of four. A stud 

 of the different species of Scirpus leads to 

 some species of the genus may possess more than one type 



In another 



incom 



the conclusion that 



rasrm 



has not yet been determined 



