PLATE 42 
Age 
bag ee 
p44) 
é ° 
r~ 
/ 
| 
2 
te ate 
vA TA 
USNEA FLORIDA Web. 
a. Plant on branch. b. Transverse section of thallus. 
c. Vertical section of thallus. 
f. Spores. 
e. Ascus and paraphysis. 
d, Vertical section of apothecium. 
