STUDY 9. 
A MUSHROOM OR ‘“ TOADSTOOL.”’ 
A. Reproductive Stage. 
1. The part more or less elongated is the stalk or 
“stem.” What evidence is there which is the 
proximal end? 
. The expanded distal region is the pileus, which bears 
on its under surface gills, pores, or spines. Which 
does your specimens have? 
. If there is a marginal attachment of the pileus to 
the stalk, it is the veil. If present, what is its 
origin and purpose? 
. If there is a remnant of the veil attached to the 
stalk, it is the ring. Is it present? 
. In a longitudinal section of the plant, with m. 
observe the structure of the stalk and pileus. Of 
what do they consist? 
. With l.p. and h.p. study the spores. From what 
region of the pileus do they originate? 
. If the pileus has gills, where are they the most 
numerous? 
. Make drawings: (a) under surface of pileus; (6) a 
longitudinal section of the stalk and pileus; 
(¢) spores; (d) a lateral view of the entire mush- 
room designating all parts. 
Life Problems. 
1. Where do these plants grow? 
2. Under what conditions do they thrive best ? 
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