THE FUNGI WHICH CAUSE PLANT DISEASE 



395 



Key to Orders of Eubasidii 



Gelatinous fungi with forked basidia 



Basidia clavate, xindivided 

 Hymenium without stroma, parasites, 



basidia free, strict , 



Stroma usually well developed, fleshy, 

 coriaceous, leathery or woody 

 Spores arising from basidia which form 

 a distinct membranous hjrmenium 

 which is naked at maturity, and 

 frequently covers the surface of 

 gills, pores or spines (Hjonenomy- 



cetes) 



Spores arising from basidia enclosed in a 

 definite peridiima (Gasteromycetes.) 

 Spores borne in a more or less deli- 

 quescent gleba which is at first 

 enclosed in a peridium, but is at 



maturity elevated on stipe 



Spores remaining within the peridiimi 

 until maturity 

 Basidia united into a h}rmenium 

 which lines the walls of irreg- 

 ular cavities 

 Hymenial cavities remaining 

 together in the peridium, 

 their boundaries mostly 

 disappearing at maturity 

 Fleshy until the maturity of 

 the spores, capiUitium 



none 



Fleshy when young, at matu- 

 rity filled with dust-Uke 

 sjjore-masses mixed with 

 capiUitium (puff balls) . . 

 Hymenial cavities separating at 

 maturity from the cup-like 

 peridium (bird-nest fungi) . 

 Basidia uniformly distributed 

 through the peridium or 

 forming skein-Uke masses . . . 



1. Dacryomycetales. 



2. Exobasidiales, p. 396. 



3. Agaricales, p. 398. 



4. Phallales, p. 462. 



5. Hymenogastrales. 



6. Lycoperdales, p. 464. 



7. Nidulariales. 



8. Sclerodermatales. 



