— SI — 



disk is reddish brown or chestnut, has an entire margin and is flat or slightly- 

 convex. 5. pulmonaria is a common species in North America, it grows on 

 living and dead trees, and on rocks. 



Sticta Oregona Tuck. Plate IX. Fig. 2. Thallus similar to 5. pul- 

 monaria, is not so brittle, but soft and crumbles easily. It has long lobes, 

 rounded at the ends, with erose, finely dissected edges which give it a 

 ragged appearance; in color is a light greenish brown. The under surface 

 is also light brown and covered with a fine nap, through which appear light 

 colored, bare looking spots as in ampiissima. The apothecia are medium, 

 scattered over the surface, but more numerous near the margin, the disk is a 

 dark chestnut with a light colored margin, This species is found in Oregon, 

 as its specific name indicates, also in California and British Columbia, grow- 

 ing on trees. ♦ 



Sticta quercizans (Michx.) Ach. Plate IX. Fig. i. Thallus thin, 

 somewhat coriaceous, smooth, from greenish to reddish brown, darker at the 

 margin. The lobes are deeply cut, pinnatifid, with rounded ends which are 

 usually crisped, finely toothed, with tiny, coral-like points. 



In many specimens at the margin the thallus breaks and shows a line of 

 the white inner layer. The under surface is a paler brown with a thick, 

 spongy nap, dotted with numerous round, white cyphellae which look like 

 minute holes in the thick nap. 



Apothecia are very rare except in tropical specimens, they are small, 

 marginal, with a red brown disk and thin toothed margin, lighter in color 

 than the disk. Found on trees and rocks with moss, common in the south- 

 ern states, especially in the mountains of North Carolina. 



Sticta crocata (L.) Ach. In appearance this species resembles S. 

 aurata, but the thallus is russet brown, not reddish brown, the soredia are 

 lemon colored, not golden, the lobes are longer and narrower, with crenate 

 margins, the surface is pitted and wrinkled. The powdery lemon colored 

 soredia are found on the thallus as well as the margin. On the under side it 

 is a light brown, turning darker until almost black. 



Apothecia are rare except in tropical specimens where they are small 

 and not abundant, the disk is a dark chestnut, with a paler, entire margin. 

 This handsome lichen is found on rocks, growing with moss, occasionally is 

 found on trees. 



Sticta anthraspis Ach. Plate IX. Fig. 4. Thallus thin and brittle, 

 reticulated with deep depressions, the lobes are wide with irregular crenate 

 edges, these are frequently covered with light gray soredia. In color it is a 

 light olive brown, becoming darker until it is a russet brown. The under- 

 side is covered with a light brown nap which is thicker and darker at the 

 centre. The cyphellae are very minute and white, not depressed but seem- 

 ing to be on the surface of the thick nap. The apothecia are very numerous 

 in specimens where soredia are not present; they are medium, the disk con- 

 vex and reddish brown. 



This species is found on rocks with mosses, and on trees, in California, 

 Oregon, and farther north, as well as in the tropics. 



