PLATE XXVIII, 



s retitaipetala HAYATA. 



Fig. 1. A branch of the plant. 



2. A flower, seen from a little above. 



3. The same, seen from a little below. 



4. The same, in vertical section. 



5. A lobe of a calyx, seen from within and without. 



6. Petal. 



7. Stamen, seen from a different side. 



8. A carpel. 



