] 









t 



VOLUME LXX 



NUMBER 6 



THE 



Botanical Gazette 



DECEMBER 1920 



FLOWER AND SEED OF HEDYOSMUM NUTANS 1 



J. Graham Edwards 



(with plates xxxiv-xxxvi) 



The investigation of the seed development of Hedyosmum 

 (Chloranthaceae) was undertaken at the suggestion of Professor 

 Duncan S. Johnson. Of the 20 or more species of this genus, 

 two species were studied. These two, H. nutans and H. arborescens, 

 represent the largest of the three subgenera of the genus, so that the 

 following results can perhaps be taken as characteristic of the genus 

 as a whole. All of the figures used, except fig. 38, are from E. 

 nutans. In the important features of the development of the 

 embryo sac, perianth, etc., of H. arborescens y there is quite close 

 agreement with those of H. nutans. 



All of the material used was fixed by Johnson in chromo- 

 acetic fixative. 2 The further work of imbedding, sectioning, and 

 staining was done by the writer, except that figs. 41 and 44 were 

 made from slides previously prepared by Johnson. The sections 

 from which drawings were made were cut 7 m thick. All sectioned 

 material was stained with Flemming's triple stain and mounted in 

 balsam. 



The writer gratefully acknowledges the aid received from Profes- 



j 



manuscn 



Johns 



2 The material used was collected and fixed by D. S. John 

 1906, with the aid of a grant from the Bache fund. 



409 



