The Botanical Gazette 
HA Montblp Journal Embracing all Departments of Botanical Science 
Edited by JOHN M. COULTER, with the assistance of rea members of the botanical staff of the 
University of Chic 
Issued May 16, ae 
Vol. LVIL CONTENTS FOR MAY 1914 No. 5 
THE PROBABLE ORIGIN OF OENOTHERA LAMARCKIANA SER. il ITH PLATES XV ane 
Hugo De Vries - - 345 
THE SPUR tal OF ine PINES vt PLATES XX—XXIII AND TWO TEXT Satis’ Robert 
Boyd Thoms a = ae eaed 
A Pa ETCAL STUDY OF THE GERMINATION OF AVENA FATUA.. Contrisv- 
TIONS FROM THE HULL. BoTANICAL LABORATORY SAS, EE THIRTEEN Maite: W. M. 
Atwodd » sores es OO 
ited gr ef PLANTS FROM GUATEMALA AND OTHER CENTRAL AMERICAN 
; EPUBLICS. XXXVIII.. John Donnell Smith 415 
THE ovary oe et OF CYRTANTHUS SANGUINEUS. ConTRIBUTIONS FROM 
L Lt LaporaTory 186 ares: PLATE.XXIV AND THREE TEXT iyseseg 
ia argaret aa ps - - Pe eG, tae ee 428 
esas 0 £S - - z My a is 3, = Z = é i es xs 
NOTES FOR STUDENTS a “ x zy & ia os = a S é a = 3430 
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