f. 



t 



^ 



VOL. 32 OCTOBER, 1905 NO. ID 



BULLETIN 



OF THE 



TORREY BOTANICAL CLUB 



"\ 



€tiitor 



John Hendley barnhart 



Nathaniel Lord Britton Daniel Trembly MacDougal 



Tracy Elliot Hazen William Alphonso Murrill 



Marshall Avery Howe Herbert Maule Richards 



Anna Murray Vail 



CONTENTS 



> 



A new method of measuring the transpiration of plants in place. 



WILLIAM AUSTIN CANNON 5^5 



The fruit of Opuntia JAMES ARTHUR HARRIS 53 « 



Studies on the flora of Southern California. ....... LE ROY ABRAMS 537 



Agropyron tenerum and its allies CHARLES VANCOUVER PIPER 543 



The desmid flora of Nantucket JOSEPH AUGUSTINE CUSHMAH 549 



INDEX TO AMERICAN BOTANICAL LITERATURE 555 



PUBLISHED FOR THE CLUB 



THE NEW ERA PHINTINC COMPANY 



LAwcAsren, pa. 



