PLATE XXXI. 



Polygonum morrisonsnss Hayata. 



Fig. 1. The plant. 



2. A l)rancli, slioAviug slieatlis. 



8. A head. 



4. Bracts, seen from different sides. 



5, A flower. 



G. A perianth, laid open. 



7. An ovarj'. 



8. A stamen with a gland at the base of the filament. 



9. A fruit. 



10. A seed. 



11. An embrvo. 



