406 THE FUNGI WHICH CAUSE PLANT DISEASE 



Context of only one layer 

 Hs^menophore leathery 

 Hymenium not ribbed 

 Hymenium almost smooth or 

 with warts 



Basidia continuous 9. Thelephora, p. 410. 



Basidia septate 10. Septobasidimn, p. 411. 



Hymenophore smooth 11. Hypolyssus. 



Hymenium with ribs 



Ribs becoming warty 12. Cladoderris. 



Eibs with warty spines 13. Beccariella. 



Hjrmenophore not leathery 

 Hymenophore gelatinous-fleshy 14. Phlebophora. 

 Hymenophore membranous, rare- 

 ly fleshy or fleshy-leathery 

 Hjrmenium exterior to the 



hymenophore 15. Craterellus. 



Hymenium inside the hy- 

 menophore 

 Hymenophores mostly soli- 

 tary 

 Hymenophore sessile or 



laterally stipitate 16. Cyphella. 



Hjonenophore centrally 



attached 17. Discocyphella. 



Hymenophores closely 



grouped 18. Solenia. 



Hymenophore with cystidia 

 Gystidia of a single cell 

 Cystidia unbranched 

 Hsrmenophore of a single layer 



Hymenophore resupinate 19. Peniophora. 



Hymenophore laterally short- 

 stalked 20. Skepperia. 



Hymenophore of several layers. . . 21. Hymenochsete, p. 411. 



Cystidia stellate-branched 22. Asterostroma. 



Cystidia of several cells 23. Bonia. 



Corticium Persoon (p. 405) 



Hymenophore homogeneous in structure, membranous, leathery 

 or fleshy, almost waxy, rarely approaching gelatinous; hymenium 



