115. Sticta] 31. STICTACEAE 181 



convex, chestnut-brown to brownish black, the exciple thin, becoming crenate, 

 finally disappearing; spores fusiform or acicular, 3-septate, 42-60 X 6—9 /x. 

 On trees, Washington, Oregon, and California. 



7. Sticta Hallii Tuck., Proc. Am. Acad. 12:168. 1877. 



Lobaria Hallii (Tuck.) Zahlbr. Stictina Hallii (Tuck.) Stizenb. 



Thallus small to middle-sized, rather loosely attached to the substratum, reticu- 

 lately pitted, obscurely chinky and granulose, finally more or less covered with 

 lead-colored soredia, greenish gray to ashy, the lobes wide and round; brownish 

 below, ribbed and bearing pale rhizoids between naked whitish spots; apothecia 

 small to middle-sized, 0.8-3 mm. across, the disk becoming flat, reddish brown, 

 the exciple thin, externally ciliate; spores brown, boat-shaped, 1 -septate, 23-36 X 

 9-14/*. 



On trees and soil, Washington, Oregon, and Colorado. 



8. Sticta verrucosa (Huds.) Fink n. comb. 



Lichen verrucosus Huds., Fl. Angl. 445. 1762. S. scrobiculata (Scop.) Ach. 

 Lobaria scrobiculata (Scop.) Gartner. Stictina scrobiculata (Scop.) Nyl. 



Thallus middle-sized to large, rather loosely attached to the substratum, smooth 

 to more or less pitted, bearing grayish soredia especially along the margins, green- 

 ish gray to yellowish or brownish, the lobes large, imbricated, with wavy-crenate 

 margins; brownish below, or becoming darker toward the center, clothed with a 

 spongy nap of short rhizoids interspersed with whitish naked spots; apothecia 

 small to middle-sized, 0.8-2 mm. across, scattered, sessile, the disk flat, reddish 

 brown, the exciple thin, becoming slightly wavy; spores acicular, 3-7-septate, 

 50-75 X 5-7 /*. (Plate 11.) 



On trees and over mosses, New England, New York, Minnesota, Washington, 

 Oregon, and California. 



9. Sticta aurata Ach., Meth. Lich. 277. 1803. 



Thallus small to middle-sized, closely attached to the substratum, smooth, 

 greenish gray to brownish red or at length rose-red, the lobes broad, somewhat 

 imbricated, rather deeply cut, with crenate, yellowish, sorediate margins; bright 

 yellow within; reddish to yellowish brown below or darkening toward the center, 

 clothed with a spongy nap of short rhizoids interspersed with minute, yellowish, 

 sorediate cyphellae; apothecia middle-sized to large, 1-2.5 mm. across, sessile, 

 marginal or submarginal, the disk flat, purplish brown or brown, the exciple thin, 

 becoming wavy; spores brownish, fusiform, 3-septate, 21-30X6-9/*. 



On trees, from Maine to Florida, and westward to Texas and Minnesota, and 

 in Washington and Oregon. 



10. Sticta crocata (L.) Ach., Meth. Lich. 277. 1803. 



Lichen crocatus L., Mant. Alt. 310. 1771. Stictina crocata (L.) Nyl. 



Thallus small to middle-sized or rarely larger, usually rather loosely attached 

 to the substratum, smooth or becoming more or less pitted, greenish gray to 

 brownish or greenish brown, bordered and more or less sprinkled with yellowish 

 green soredia, the lobes usually wide, sometimes much divided, more or less im- 

 bricated, with crenate margins; brownish below or becoming darker toward the 

 center, clothed with a soft nap of short rhizoids interspersed with minute, yellow- 

 ish, sorediate cyphellae; apothecia middle-sized, 1-1.5 mm. across, sessile, mar- 

 ginal or scattered, the disk flat, becoming black, the exciple thin, crenate, 

 disappearing; spores brown, oblong-fusiform, 1-septate, 20-32X8.5-10/*. 



On trees and over mossy rocks, from Maine to Florida and Alabama, and in 

 Minnesota, Washington, and Oregon. 



11. Sticta anthraspis Ach., Meth. Lich. 280. 1803. 

 Stictina anthraspis (Ach.) Nyl. 



Thallus middle-sized to large, loosely attached to the substratum, reticulately 

 veined, irregularly pitted, greenish gray to greenish brown or brown, the lobes 



