Explanation of PL XVIII. 



Carex arisancmis HAYATA. 



Fig. 1. The plant. 



2. A portion of a loaf, showing a lignlo. 



2'. A section of the .same portion. 



o. A male spikclet, anthers fallen oiF. 



4. A glume of a male flower. 



5. A glume of a female flower. 



O 



6. 7. Utricles seen from different sides. 



8. Section of the same. 



9. A nutlet, 



