Explanation of PI. XXII, 



Styrax Matsuinn-rcana PEIIK. 



Fig. 1. A branch. 



2. A flower. 



3. Calyx. 



4. A hair on the calyx. 



5. Corolla expanded, showing stamens. 



6. Stamens seen from different sides. 



7. An ovary in vertical section. 



