156 A TEXT-BOOK OF BOTANY 
but numerous forms display the spore-producing layer in 
other ways. For example, the pore Fungi are so named 
because they have pore-like depressions or tubes lined by 
the basidium-layer, instead of gills. In addition to umbrella- 
like forms among the pore Fungi (Fig. 148), there are the 
numerous bracket Fungi, which appear as hard hoof-like 
outgrowths on tree trunks (Fig. 149), stumps, ete. Some 
I'ic, 149.—A bracket-fungus (pore-fungus) growing on red ocak. 
of these bracket Fungi are perennial, showing annual Jay- 
ers of growth, as the common touchwood or punk. Other 
mushrooms have the umbrella-like bodies, but instead of 
either gills or pores, there are spine-like processes coated by 
the spore-forming layer (Fig. 150); others appear as 
