142 



Mycologia 



cm. in diameter and showed a few isidioid branchlets. During 

 the second year the increase in size was about the same, and the 

 central, oldest portion of the plant had developed many isidioid 

 branchlets. 



Kentucky, area 31, on a sandstone boulder on high, open 

 ground, the boulder 1 by 1.5 m. across, 1 m. high, the upper 

 surface making an angle of 10 degrees with the horizon and fac- 

 ing southward. Five plants of Parmelia conspersa, growing on 

 the upper surface, were marked. They varied from 1 to 2 cm. 

 across. After 10 months the plants varied from 1.5 to 2.2. cm. 

 across. After 4 years the sizes ranged from 2.5 to 4 cm. across. 



Kentucky, area 3, on the northwest side of the perpendicular 

 face of a sandstone-conglomerate outcrop 2 m. high, standing on 

 a high, dry, sparsely-wooded hill, where shaded until the middle of 

 the afternoon. Two plants of Parmelia conspersa 40 cm. from 

 the ground and 1 and 3 cm. across respectively were marked. 

 After 10 months they had increased to 1.5 and 3.5 cm. across. 

 After 4 years the plants were 3 and 7 cm. across. Both speci- 

 mens were sterile throughout the 8 years of observation, and they 

 did not grow perceptibly during the last 4 years. 



Kentucky, area 6, habitat similar to Kentucky, area 3, 2 but the 

 plants 75 cm. from the ground. Two specimens of Parmelia con- 

 spersa were marked, both sterile and smooth, and 1.4 and 4 cm. 

 across, respectively. After 10 months the plants were 2.5 and 5 

 cm. across. After 4 years they were 3 and 8 cm. across. The 

 plants remained smooth and sterile during the 8 years of observa- 

 tion ; and they deteriorated toward the close of the period so that 

 further observations could not be made. 



Ohio, area 19, on a tulip tree, 22 cm. in diameter, in a low, 

 moist wood, furnishing shade. A smooth and sterile Parmelia 

 caperata, situated 1.4 m. from the ground, measured 3.5 by 4 cm. 

 across. After 1 year the plant was 3.75 by 4.8 cm. across and 

 still smooth and sterile. 



Ohio, area 6, habitat similar to Ohio, area 5, 3 but 1.4 m. from 

 the ground on the northwest side of the tree. The specimen of 

 Parmelia conspersa studied was 1.5 cm. across when marked. 



2 See the area discussed next above, 

 s See Ohio, area 5, p. 141. 



