FUNGI. 



85 



become exposed. Here belong the toadstools and mushrooms 

 (Fig. 51, -B), the large shelf-shaped fungi (Potyporus), so com- 

 mon on tree trunks and rotten logs (Fig. 51, (/,' D, E) } and the 

 prickly fungus (Hydnum) (Fig. 51, G). 



FIG. 51. Forms of Basidiomycetes. A, Tremella, one-half natural size. B, 

 Agaricus, natural size. C, E, Polyporus : C, x % ; E, x y 4 . Z), part of the 

 under surface of D, natural size. F, Clavaria, a small piece, natural size. 

 G, Hydnum, a piece of the natural size. 



Of the last, or naked-fruited forms, the commonest belong 

 to the genus Clavaria (Fig. 51, F), smooth-branching forms, 

 usually of a brownish color, bearing the spores directly upon 

 the surface of the branches. 



