Explanatiou of Pl. XXI. 



Phifrmt/iera 2^ncJiijglossii Hayata. 



1. The plant. 



2. A flower. 



B. Tlie sarae, seen from side. 



4. Tlie same, seen from b.ack. 



5. Central iDortion ot a flower. 

 G. The sanie in vertical section. 



7. Cohimn, seen from side. 



8. 9. Polhnarinm, seeu from difierent sides. 



