206 LICHENES. [Sticta. 



and given to me by M. de Humboldt. — The broken thallus of this and 

 the preceding species, exhibits a yellow powder within. 



4. S. puhnondria, (Lungwort Sticta); thallus wide-spreading 

 olive-green pale brown when dry pitted and reticulated smooth 

 or bearing powdery whitish warts on the reticulations and fre- 

 quently elongated scattered or tufted granules deeply laciniated 

 and broadly lobed and sinuated beneath clothed with brownish 

 downy fibres the swellings bare, apothecia mostly marginal 

 red-brown with a thick border. — S. pulmonacea, Ach. Syn. 

 p. 233. — Lichen pulmonarius, Linn. — E. Bot. t. 572. 



On the trunks of trees, in mountainous countries, frequently invest- 

 ing them for a considerable extent with its large shaggy -looking fronds. 



5 S. scrobiciddta, Ach. (jntted Sticta); thallus wide-spread- 

 ing greyish-green and glaucous above pitted and bearing grey 

 mealy warts especially near the margin the segments rounded 

 and lobed irregular beneath downy tawny with bare prominent 

 white spots, apothecia scattered small red-brown with a thick 

 border. — Ach. Syn. p. 234. — Lichen scrobiculatus, Scojj. — 

 E. Bot. t. 497. — L. verrucosus^ Huds. — Jacq. Coll. v. 4. t. 18. 

 f. 2.— Bill. Muse. t. 29. /. 114. 



Trunks of trees in mountainous countries, and upon rocks among 

 mosses, in exposed situations. 



6. S. limhdta, Ach. (mealy -bordered Sticta); thallus orbicular 

 glaucous-brown with broad and rounded lobes and with grey and 

 powdery warts which are very copious at the margin, beneath near- 

 ly of the same colour with downy fibres and naked pale cyphellse, 

 apothecia brown almost imbedded in the thallus with a slightly 

 elevated border. — Ach. Syn. p. 236. — Lichen limbatus, E. Bot. 

 t. 1104.— Bill. Muse. t. 26. f. 100. B,C. 



Bagley wood, Oxfordshire, Dill. — N. of England, Wales and Scot- 

 land, upon rocks. — The apothecia I have never seen, they are figured in 

 E. Bot. from Mr. Turner's Snowdon specimens. — This species seems 

 but little known upon the continent and is certainly very nearly allied 

 to the following. 



7. S.fuliginosa, Ach. (sooty Sticta); thallus orbicular dark 

 lurid-grey rough with blackish granulations broadly lobed at 

 the margin, beneath greyish-brown downy and fibrous with bare 

 pale sunken spots or cyphellae, apothecia scattered red-brown 

 flat with a thick fringed border, at length convex Avith the 



border obliterated. — Ach. Syn. p. 236 Lichen fuliginosus, 



Bicks.—E. Bot. 1. 1103.— Bill. Muse. t. 26. f. 100. A. 



On rocks and trees in subalpine countries, frequent. — Its fructification 

 is very rare. I am indebted for excellent specimens in that state to my 

 valued friend Dr. Richardson, who gathered them on trees near Dum- 

 fries. " The shields" he observes, " are not marginal ; when young, 

 they are covered with a thin membranaceous border, which is lacerated 

 or rather regularly toothed (bearing a striking resemblance to the peri- 

 dium of Phacidium coronaium). In an older state, the dish is swollen 

 and the border nearly obliterated." Richardson in litt. — This and the 



