UNIVERSITY OF CALIFORNIA PUBLICATIONS 



IN 



BOTANY 



Vol. 7, No. 3, pp. 39-68, plates 7-10 December 9, 1916 



NOTES ON THE CALIFORNIAN SPECIES OF 



TBILLIUM L. 



III. SEASONAL CHANGES IN TRILLIUM SPECIES WITH ^.t'***"'^ 



SPECIAL REFERENCE TO THE REPRODUCTIVE •*«'A/v#< 



TISSUES 



BY 



EGBERT PERCY BRANDT 



CONTENTS 



PAGE 



I. Introduction 39 



II. The subterranean organs of Trillium species 42 



III. The active period — February to July 46 



1. Above ground 46 



a. Trillium sessile var. giganteum 46 



b. T. ovatum 49 



2. Below ground 49 



a. T. sessile var. giganteum ". 49 



6. T. ovatum 51 



IV. The dormant period — August to January 52 



a. T. sessile var. giganteum 52 



6. T. ovatum 57 



V. Summary 57 



VI. Literature cited 60 



VII. Explanation of plates 62 



I. Introduction 



The variety of problems presented has made a study of the species 

 of Trillium native in the region immediately surrounding San Fran- 

 cisco Bay of unusual interest and importance. The first two of the 



