FUNGI. 357 
branches like a miniature tree, bearing spores not 
in regular rows, but like leaves or fruit in irregular 
Fic. 37.—PENICILLIUM CRUSTACEUM. 
clusters on each branch, whereas the stem of the 
aspergillus is unbranched, and bears on its sum- 
mit many rows of spores, which are placed in 
Fic. 38.—Mucor MuceEbo. 
(2) Natural size. (6) Highly magnified. 
linear order like necklaces, and joined to the stem 
like a bundle of hairs on a brush. Another fami- 
liar kind of mould is the Mucor mucedo (Fig. 38), 
or yellow mould, also extremely common. It dif- 
