60 



length is due almost entirely to differences in filament length, 

 there being hardly measurable differences in anther length. The 

 shorter dehisce entirely before the longer, which continue to 

 increase in length until in the fully open flower a maximum is 

 reached, as indicated by the dotted tips in the figure. The 

 preserved material at hand clearly indicates the maturity and 

 dispersal of pollen from the short stamens before the stigma is 

 functional, while the last pollen is dropped from the long stamens 

 after that period. 



The following species have also been examined, with results 

 as given. With clearly evident dimorphic stamens are the 

 following species: E. citrinum Wats., E. giganteum Lindl., E. 

 montaniim Wats., E. proptdlans A. Gray. The last named is 

 represented here by a very few specimens, and I would be 

 glad to know whether or not the same condition of stamen length 

 is evident in larger collections. This is of special importance 

 because of the fact that the illustration in Britton and Brown's 

 Illustrated Flora shows the stamens of equal length. E. parvi- 

 florum (Wats.) Gooding has stamens of varying length but not 

 clearly of two groups as in the other species examined. This 

 point is important as bearing upon the possible relationship of 

 this species with E. grandiflorum Pursh, since it was considered 

 by Watson as but a variety or at most a subspecies. 

 Washington- State College, 

 Pullman', Wash. 



BRYOLOGICAL NOTES 



By a. LeRoy Andrews 



III. Further Mosses New to Iceland* 



As introductory to this short list of species it should be said 

 that my Icelandic itinerary of 1914, which was largely controlled 

 by other considerations than those of botanical research, con- 

 sisted of part of a day at Seydhisfjordhur on the east coast, 

 where collections were made at points readil}^ accessible from 

 the harbor, another half-day at Akureyri in the north, where 



* Numbers I and II of this series were published in Torreya, April 19 15 and 

 February, 1916. 



