STICTIXA.J STICTEI. 269 



obtuse at the apices. Apothecia small or moderate, scattered, plane 

 or slightly convex, the margin naked ; spores as in $. fnliyinosa. 

 Cromb. Lich. Brit. p. 30 ; Leight. Lich. Fl. p. 116, ed.*3, p. 109. 

 Sticta sylvatica Gray, Nat. Arr. i. p. 432 ; Hook. Fl. Scot. ii. 

 p. 59 ; Sm. Eng. Fl. v. p. 207 ; Tayl. in Mack. Fl. Hib. ii. p. 152 ; 

 Mudd, Man. p. 87. Lichen st/lvaticus, Huds. Fl. Angl. (1762) 

 p. 453 ; Lightf. Fl. Scot. ii. p.' 848 ; With. Nat. Arr. ed. 3, iv. 

 p. 71 ; Eng. Bot. t. 2298. Lichenoides polysclddes villosum et 

 scabrum, peltis parvis Dill. Muse. 199, t. 27. f. 101. Brit. Exs. : 

 Leight. n. 109 ; Cromb. n. 134. 



Also intimately allied to S.fuliginosa, from which it may 'be recog- 

 nized by the more deeply divided thallus, the narrower lobes which are 

 bifid or trifid towards the extremities, and the generally more naked or 

 slightly furfuraceous upper surface. It is usually a larger plant, and 

 spreads more extensively over the substratum. With us it is always 

 sterile. 



Hab. On mossy rocks, old walls, and about the roots of trees in shads- 

 places by lakes and rivers in upland districts. Distr. Not very general, 

 though usually plentiful, in the West of Great Britain and Ireland ; 

 abundant in the S.W. Highlands of Scotland. B. M. : Lydford, Widde- 

 combe, Meavy, Lustleicrh Cleeve, and Bigbury, Devonshire ; Boconnoc 

 and near Penzance, Cornwall ; near Oswestry, Shropshire ; Hafod, Car- 

 diganshire, Dolgelly, Barmouth, and Rhewgreidden, Merionethshire; 

 Conway Falls, Carnarvonshire ; Island of Anglesea ; Eglestone, Durham ; 

 Mardafe, Westmoreland ; Keswick, Cumberland ; The Cheviots, Nor- 

 thumberland. New Galloway, Kirkcudbrightshire ; Beld Craig, Moffiit, 

 Dumfriesshire ; Falls of the Clyde, Lanarkshire ; Callender rock, near 

 Stirling ; Inverary, Appin, and Barcaldine, Argyleshire ; Falls of Leny, 

 of Moness, and in Glen Lochay, Perthshire ; Reeky Linn, Forfarshire ; 

 Craig Cluuy and Craig Coiunoch, Braemar, Aberd'eenshire : S. of Fort 

 W T illiam, and Rothiemurchus, Inverness-shire ; Cawdor Woods, Nairn. 

 Blackwater Bridge, co. Kerry ; near Kylemore and Derryclare, Coune- 

 mara, co. Gal way ; near Carrickfergus, co. Antrim. 



6. S. Dufourei Nyl. Bull. Soc. Linn. Normand. 2 ser. ii. (1867) 

 p. 590. Thallus small, thin, smooth, laciniato-lobed, glaucous or 

 glaucous-browu ; beneath slightly tomentose or nearly naked, pale- 

 brown, often reticulately rugose, with whitish or pale cyphellae ; 

 lacinise minutely dissecto-fimbriate at the margins. Apothecia un- 

 known. Leight. Lich. Fl. p. 117, ed. 3, p. 110. Stictina sylvatica 

 subsp. Dufourei Cromb. Lich. Brit. p. 30. Sticta Dufourei Del. Stict. 

 (1826) p. 78, t. 6. f. 22. Sticta elegans Deak. Mudd, Man. p. 89. 

 Sticta ciliata Tayl. in Mack. Fl. Hib. ii. p. 152. S.fimbriata Tayl. 

 Jour. Bot. 1847/p. 180. Brit. Exs. : Leight. n. 173 ; Cromb. n. 135. 



Looks intermediate between S. fuliyinosa and S. sylvatica, and pos- 

 sesses some characters in common, but is distinguished from both bv the 

 characters given in the diagnosis. It is easily recognized by its h'm- 

 briate margins. It is met with in a less typical condition, with darker 

 thallus and more entire margins. It has not been seen fertile. 



Hab. On mossy rocks and trees in maritime and upland wooded tracts. 

 D-i&tr. Local and rare in S.W. England, N. Wales, the W. Highlands 

 of Scotland (less typical), and S.W. Ireland. B. M. : Near Torquay, and 

 at East Llyn, Devonshire; Pentire, near the Lizard, and Liskeard, Corn- 



