A. 
eae i 
STUDY 8. 
A LICHEN. 
Vegetative and Reproductive Stages. 
Upon what does it grow ? 
How is the thallus attached ? 
What is the form and color of the thallus ? 
Observe the fruiting cup structures. What is their 
size and distribution ? 
5. Draw and designate parts of the thallus. 
6. Remove a small piece from a wet thallus and tear 
with needles, and with Lp. and h.p. observe the 
different parts. How do they vary in form and 
color? 
7. With what former studies do the structural elements 
compare ? 
8. Make a drawing showing the structure. 
9. Study a similar preparation of a portion of a fruiting 
cup and observe the erect hyphz which bear spo- 
rangia. How many spores are there in each spo- 
rangium ? 
10. Do all the hyphe bear sporangia? If not, of what 
advantage are the sterile hyphe ? 
11. Sketch a portion of a fruiting cup designating all 
parts. 
B. Life Problems. 
1. Why is it a thallus? 
2. 
Why is it brighter in color when wet? 
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