Rosendahl: new species of razoumofskya. 273 



5 mm. long : flowers nearly sessile, partly enclosed by the con- 

 nate leaves : fruit 4-5 mm. long, 2.5-3 mm - in diameter, obo- 

 vate, short conic-beaked, slightly compressed dorsi-ventrally, at 

 length becoming shortly stalked and reflexed. 



Explanation of Plates. 

 Plate XXVII. 

 The figures are from photographs made by C. J. Hibbard and are 

 a little less than natural size. 



1. Pistillate plant in fruiting stage. 



2. Pistillate plant attached to its host, a younger stage than fig. 1. 

 3—4. Staminate plants, medium size. 



5. Large staminate plants, attached to their host. 



Plate XXVIII. 



1. Large pistillate plant in fruiting stage, slightly enlarged. 



2. Two pistillate flowers, advanced stage, X5. 



3. Single pistillate flower, X5. 



4. Part of fruiting branch with nearly mature fruit in position, X5. 



5. Fruit removed from plant, X5. 



6. Medium sized staminate plant, slightly enlarged. 



7. End of staminate spike, flowers in bud, X5. 

 S. Terminal staminate flower expanded, X5. 



9. Terminal staminate flower, viewed from above, showing the cir- 

 cular stamens, X 6. 



