UNIVERSITY OF CALIFORNIA PUBLICATIONS 



IN 



BOTANY 



Vol. 6, No. 1 1, pp. 275-356, plates 26-30 Issued March 31, 1916 



A REVISION OF THE TUBERALES OF 



CALIFORNIA 



BY 



HELEN MAKGAEET GILKEY 



CONTENTS 



PAGE 



I. Introduction 275 



II. Materials and Technique : 277 



III. Distribution in California 279 



IV. Economic Importance 280 



V. Morphology and Phylogeny 281 



VI. Synopsis of Revision 287 



VII. Special Morphology and Taxonomy 288 



VIII. Key to Genera 342 



IX. Acknowledgments 342 



X. Diagnoses of New Genus and New Species 343 



XI. Works Referred to 347 



XII. Explanation of Plates 348 



I. INTRODUCTION 



Of all members of the vegetable kingdom, the longest, perhaps, to 

 remain in absolute obscurity as to their manner of growth and methods 

 of reproduction, were the truffles and their allies. Practically no 

 study had been made of their life-history or relationships until the 

 beginning of the nineteenth century, when four species were described 

 by Persoon in his Synopsis Fungorum. Twenty years later. Fries 

 added eight species distributed through four genera. But the first 

 real critical study of these plants was made by A^ittadini, who pub- 

 li.shed in 1831 his Monograpliia Tuhcraccarum containing in thirteen 

 genera seventy-three species. These pioneer workers were followed 

 by Klotsch, Corda, and by the Tulasne brothers, whose Fungi Hypo- 

 gaei with its twenty-one exquisite plates, appearing in 1851, is still 



