-56^ 



Fig. 5. Stic t a aurata. Red. Yt^. 



S. amplissima is found on rocks in its best form, but grows on old wood 

 and even trunks of living trees. It is one of the most common of the Stictas, 

 and when growing on rocks, where it forms a large, round mat of light gray, 

 thickly covered with the reddish apothecia, is a very handsome plant. 



Sticta AURATA (Sm.)Ach. 



Fig. 5. The thallus of this 

 interesting species has 

 broad, deep lobes with cren- 

 ate margins covered with 

 golden colored soredia, is 

 greenish brown soon turn- 

 ing a brownish red and 

 finally a deep rose. The 

 inner part of the thallus is a 

 beautiful orange color, and 

 as the deep, broad lobes turn 

 over, with their bright yel- 

 low powdery margins, the 

 effect is unusual. There is 

 only one other species with 

 which S. aurata can be 

 confounded, 5. crocata, but in this the soredia are a bright lemon, the 

 thallus is more brown than red. The under surface of the thallus of 5. 

 aurata is light brown with a reddish bloom, becoming darker toward the 

 centre, with small cyphellye which appear as minute yellow spots. The 

 apothecia are large, near the margin, and are dark red; they are only found 

 on tropical specimens. This is a southern lichen, is found growing with 

 mosses on rocks and trees. 



Sticta pulmonaria (L.) 



Ach. Fig. 6. Thallus large, 

 very thin and brittle, cov- 

 ered with depressions, the 

 lobes are long, angular, 

 narrow, and truncate at the 

 ends, frequently the mar- 

 gins are thickly dotted with 

 silvery soredia. The lower 

 side is a light brown, vil- 

 lous, and loosely attached 

 to the substratum. There 

 are no cyphellse, but light 

 spots appear which seem 

 to be caused by the depres- 



^ . , , • T. J , / sions above. 



Fie;. 6. Sticta -pulmoiiaria. Red. y^. • -u- -u 



^ ^ The apothecia. which are 



not so common as soredia, are medium in size, usually near the margin, the 



