1887.] 



fhe NeigJihourTiood of Simla. 



375 



I 



Plate XIV. 

 portion of shoot showing petioles attacked, natural size, 

 peridial cells, x 350. 

 aecidiospores, x 350. 



a. leaf, natural size. 



b. same somewhat enlarged. 

 a. secidiospore, x 350. 

 h. peridial cell, x 350. 

 transverse section of leaf showing peculiar disposition of 



mycelium and superficial nature of spermogonium. 

 a. layer of mycelial filaments on lower side of leaf ; h. 



same on upper side, x 480. 

 secidiospore, x 350. 

 peridial cells, x 350. 

 two isolated peridial cells, x 350. 



Plate XY. 

 under surface of affected leaf, natural size, 

 upper surface. 



upper surface of attached leaf, natural size, 

 peridial cells, x 350. 

 peridial cells, x 350. 

 aecidiospores, x 350. 

 secidiospore germinating, x 350. 



germinating aecidiospore, showing formation of secondary 

 spore (sporidium) and its germination while in situ, 

 x 350. 

 secondary spore (sporidium), x 

 peridial cells, x 350. 

 secidiospores, x 350. 

 showing end of germinal tube 

 diospore with commencing 

 spore or sporidium, x 350. 

 completely developed secondary spore, x 350. 

 showing germination of secondary spore (sporidium) 350. 

 a. row of secidiospores ; h. isolated spore j c. and d. peri- 

 dial cells, x 350. 

 Flower head of Thalictrum minus completely involved and distorted by 

 1, natural size, approximately. 



Leaf deeply hollowed, much enlarged and thickened, and 

 covered profusely with secidia outside with a few tubes also inside, 

 natural size, approximately. 



1. 



Thalictrum : 



2. 



Jasminum : 



3. 



Ditto : 



4. 



Euphorbia : 



5. 



Ditto : 



6. 



Ditto : 



7. 



Ditto : 



8. 



Berberis : 



9. 



Ditto : 



10. 



Ditto 



1. 



Andrachne : 



2. 



Ditto : 



3. 



Berberis : 



4. 



Berberis : 



5. 



Pyrus : 



6. 



Ditto : 



7. 



Euphorbia 



8. 



Ditto : 



9. 



Ditto : 



10. 



Andrachne : 



11. 



Ditto : 



12. 



Ditto : 



13. 



Ditto : 



14. 



Ditto : 



15. 



Myriactis : 



16. 



Flower head 





the ^cidiu 



17. 



Leaf of same. 



350. 



(promycelium ?) of aeci- 

 formation of secondary 



