THE PLANT GEOUPS 97 



structure as that of Rhizopus ? Is it unicellular or multi- 

 cellular ? Note the structure of the hyphse. Draw a 

 small portion of the mycelium of a blue mold, to differ- 

 entiate it from the mycelium of Rhizopus. Label 

 correctly. 



3. Spore production. Eead the description of spore formation 



in PenieUlium and Asperyillus (Figs. 144 and 145) in 

 the text. Observe spore-bearing cultures of these molds 

 as for Rhizopus. How do these molds differ from 

 Rhizopus in their method of spore formation ? How 

 does Penidllium differ from Aspergillus in this respect ? 



4. Draw appropriate diagrams to express the methods of 



spore formation in Penicillium or Aspergillus. State 

 concisely the difference in the method of spore forma- 

 tion in RkizopuB and the blue molds. 



MUSHROOMS AND THEIR ALLIES 



MUSHROOMS 



1. Habitat. What is the habitat of mushrooms ? Be able to 



name a number of habitats for mushrooms and their 

 allies, the bracket fungi. What forms a common 

 ingredient, or component, of the soil in all mushroom 

 habitats ? 



2. Habit and parts. 



a. What are the parts of a common mushroom ? What 

 are the submerged portions in the soil, log, or other 

 mushroom habitat ? See complete specimens for this, 

 including subterranean parts. What is the general 

 form, texture, and color of the aerial parts ? Observe 

 the underside of the umbrellalike aerial portion. 

 What do you find ? What is the function of these 

 structures on the underside of the umbrella ? 



