VOL. 33 JULY, 1906 MO. 7 



BULLETIN 



OF THE 



TORREY BOTANICAL CLUB 



€bitor 



John Hendley Barnhart 



associate <£&itor£ 



Alexander William Evans William Alphonso Murrill 



Tracy Elliot Hazen Herbert Maule Richaros 



Marshall Avery Howe Anna Murray Vail 



CONTENTS 



Absorption of atmospheric moisture by desert shrubs. 



VOLNEY MORGAN SPALDING 367 



The mechanism of seed-dispersal in Polygonum virginianum. 



HOWARD SPRAGUE REED and ISADORE SMOOT 377 

 The pedunculate species of Trillium HENRY ALLAN GLEASON 387 



INDEX TO AMERICAN BOTANICAL LITERATURE 397 



PUBLISHED FOR THE CLUB 



THE NEW ERA PRINT«N« COMPANY 



LANCASTER. PA. 





