Plate XVII. 





7înrrîhot' n f ntrt n f"!^ il tn X/il tif 7 /i rti /~i rî i"" n n ^ RI 



z^iii^iutr iiruiiiuiiLuifi \ ai, ci z,. uiiiurituiio oi. 



Fig. 1. 



Spike of Z. amaricans var. elongata. 



2. 



The same fruiting. 



3. 



Bract with flower of the same. 



4. 



Flower explained. 



5. 



Bipetalous flower. 



6. 



Spike of Z. aromaticum Val. 



7. 



The same, flower from the face. 



8, 9. 



Fl. of Z. amaricans 81. 



