LECANORA. 195 



8-16-locular, ^ mic. Ach. Syn. p. 174. Nyl. Syn. N. Caled. 



p. 30. 



Trees, and also on rocks. South Carolina (Ravenel), Tuck- 

 erm. Gen. 1872. Florida, Beaumont. Alabama, Peters. Louis- 

 iana, Hale. Texas; and New Mexico (rocks), Wright. 



30. L. ventosa (L.) Ach.; thallus incrassated, tartareous, 

 areolate-verrucose, the areoles at length rimulose - rugulose ; 

 greenish -sulphur- coloured j apothecia middling to ample, ap- 

 pressed, more or less zeorine, at length irregular ; disk blood- 

 red, naked, sub-marginate, soon convex and excluding the entire 

 (or more rarely rugose-crenate) thalline margin. Spores acicu- 



lar, 4-8-locular, ^ inic. Syn. 159. Parmelia, Fr. L. E. p. 



153. Schar. Spicil. p. 405. Tuck. Lich. exs. n. 21. 



Alpine rocks. Arctic America (Richardson), Hooker I. c. 

 1823. Greenland, Vahl Islands of Behring's Straits, Wright. 

 White Mountains, Tuckerman. Adirondack Mountains, New 

 York, Peck. 



31 . L. elatina, Ach. ; thallus thin and powdery, becoming 

 densely granulate ; pale-yellowish-white ; apothecia smallish to 

 middling, sessile, more or less distinctly zeorine ; disk from pale 

 at length dark-reddish-brown, somewhat pruinose, soon convex 

 and knobby ; the obscure, irregular thalline margin soon disap- 

 pearing. Spores fusiform-acicular, curved, 4-6-locular, ^j- mic. 



Nyl. Scand. p. 174. Parmelia, Fr. L. E. p. 152. 



b. ochrophcea ; thallus incrassated and sub-tartareous, smooth- 

 ish but soon wrinkled and verrucose; glaucescent; apothecia 

 elevated- sessile, flattish; the thalline margin sub-persistent. 



Biatora, Tucker m. Syn. N. E. p. 61. Parmelia, Ejusd. Lich. 

 exs. 91, 111. 



c. minor; thallus very thin, cartilagineous, smoothish, rimu- 

 lose ; greenish-ash-coloured ; apothecia small to very small, flat- 



tish, bimarginate ; the disk white-pruinose. Hcematomma Cis- 



monicum, Beltram. cit. Hepp. in Fl. Eur. n. 104 ? 



Bark and dead wood of coniferous trees. New England, 

 Tuckerman Syn. 1848. Adirondack Mountains, New York, Peck. 

 Canada, Drummond. Black Mountains of North Carolina, Cur- 

 tis. & is perhaps the most perfect state of the species, and 



may well occur in Europe, as compare Th. Fr. Scand. p. 299, on 

 a Norwegian specimen ; but the ordinary European form occurs 



