28 



GENERA OF FUNGI 



PROMYCETES 



A. Spores produced externally as teliospores; aecia 



and uredia usually present 



1. Teliospores typically single and stipitate, some- 



times united in a gelatinous mass or a definite 

 body, or more or less fused in series 



2. Teliospores sessile, combined in flat crusts, 



pulvinate masses, or columnar forms, occa- 

 sionally arising within the epidermal cells or 

 in the mesophyll 



B. Spores produced internally in hyphae that dis- 



appear to form a more or less powdery spore- 

 mass 



1. Promycelium septate transversely, bearing spo- 



ridioles 



2. Promycelium simple, bearing a crown of 



whorled conidia 



Pucciniales p. 147 

 Pucciniaceae p. 147 



Melampsoraceae p. 153 



Ustilaginales p. 154 

 Ustilaginaceae p. 154 

 Tilletiaceae p. 155 



BASIDIOMYCETES 



A. Hymenium exposed at maturity, variously modi- 

 fied 



1. Basidia septate or cylindric-clavate and 2-spored 



a. Basidia septate 



(1) Basidia transversely septate, elongate- 



cylindric; sterigmata lateral 



(2) Basidia vertically or cruciately 2-4-divided; 



sterigmata terminal, usually subulate 



b. Basidia cylindric-clavate, not septate, with 2 



blunt terminal stecigmata 



2. Basidia not septate, typically 4-spored 



a. Pileus byssoid or lacking 



b. Pileus present, firm, crustose to cap-like 



(1) Hymenium smootii, or merely warted or 



wrinkled 



(a) Pileus resupinate, dimidiate, cupulate or 



funnel-form, typically leathery or 

 membranous 



(b) Pileus typically clavate, filiform or coral- 



loid, and fleshy 



(2) Hymenium modified into teeth, tubes or 



gills 



(a) Hymenium of teeth or tooth-like gran- 



ules 



(b) Hymenium of tubes or pores 



(c) Hymenium of gills or rarely of gill-like 



veins 

 Definite hymenium lacking; spore-mass or gleba 

 gelatinous, powdery or saccate, typically en- 

 closed in a peridium, sometimes elevated at 

 maturity 

 1. Gleba more or less gelatinous, enclosed at first 

 in a volva, then raised on a receptacle, the 

 latter usually stalked 



B 



Tremellales p. 157 



Auriculariaceae p. 157 



Tremellaceae p. 158 



Dacryomycetaceae p. 159 

 Agaricales p. 159 

 Hypochnaceae p. 160 



Thelephoraceae p. 160 

 Clavariaceae p. 162 



Hydnaceae p. 162 

 Polyporaceae p. 163 



Agaricaceae p. 164 



Lycoperdales p. 168 



Phallaceae p. 169 



