CONTENTS. 



Page. 



Introductory statement 1 



Inventory 5- 



Index of common and scientific names 35- 



ILLUSTRATIONS. 



Page, 



Plate I. The pejibaye palm, the source of a staple food of Costa Rica. 



{Guilielma utilis Oerst, S. P. I. No. 54776) 20 



II. A bunch of seedless pejibayes. {Guilielma utilis Oerst., S. P. 



I. No. 54776) 20 



III. Tubers of the Purple Ceylon yam. {Dioscoi'ea alata L., S. P. 



I. No. 54900) 26 



IV. Tubers of the Congo yam. {Dioscorea cayenensis Lam., S. P. 



I. No. 54901) 26 



III 



