270 LICHKNACKT. [sTICTIXA. 



wall; Ty Gwyn, Dolgelly, Merionethshire. Tongland, Kirkcudbright- 

 shire ; BarcaMine, Lome, Argyleshire. Askew Wood and Hyde's 

 Cottage, Killarney, co. Kerry. 



45. LOBAKINA Nyl. Flora 1877, p. 233. Thallus broadly 

 lobed, scrobiculose ; beneath partly tomcntose, gibbous, ecyphellate ; 

 gonidial layer consisting of gonimia. Apothecia lecauorpid, with 

 3-septate spores. Sperm ogones as in the preceding genus. 



Formerly included under Stictina, but separated because the thallus is 

 scrobiculose above, and destitute of cyphellaj beneath. It consists of a 

 single species common with us, as it is in most parts of Northern 

 Europe. 



1. L. scrobiculata Nyl. Flora 1877, p. 233. Thallus dilated, 

 rigid, subopaque or opaque, more or less reticulately scrobiculose, 

 usually sprinkled with whitish, or csesio-white soredia, broadly 

 lobed, glaucous-yellowish ; beneath gibboso-unequal, tomcntose, pale- 

 brown, the gibbi naked, white ; lobes rounded, undulate and more 

 or less crenate at the margins. Apothecia small, scattered, red or 

 brownish-red, the margin thick, entire, inflexed ; spores fusiform, 

 3-7-septate, colourless, 0,050-80 mm. long, 0,006-7 mm. thick. 

 Cromb. Grevillea, xv. p. 76. Stictina scrobiculata Nyl. in Cromb. 

 Lich. Brit. p. 30 ; Leight. Lich. Fl. p. 117, ed. 3, p." 110. Sticta 

 scrobiculata Gray, Nat. Arr. i. p. 430 ; Hook. Fl. Scot. ii. p. 59 : 

 Eng. Fl. p. 206; Tayl. in Mack. Fl. Hib. ii. p. 151; Mudd, Man. 

 p. 87, t. 1. f. 26. Lichen scroll cidatus, Scop. Fl. Cam. (1772) 

 p. 384 : Lightf. Fl. Scot. ii. p. 850 ; With. Arr. ed. 3, iv. p. 59 : 

 Eng. Bot. t. 497. Lichen verrucosus Huds. Fl. Angl. ed. 2, p. 545. 

 Lichenoides pulmoneum villosum, superficie scrobiculata et peltaia 

 Dill. Muse. 216, t. 29. f. 114. Lichenoides arboreum foliosum cine- 

 reum et ginuatum, inferne scabrum Dill, in Ray Syn. ed. 3, p. 75, 

 n. 77. Brit. Exs. : Leight. n. 201 ; Mudd. n. 65 ; Larb. Csosar. 

 n. 14, Lich. Hb. n. 325 ; Cromb. n. 36. 



A well-marked species, not likely to be confounded with any other in 

 the tribe. In young plants the thallus is orbicular, less scrobiculose and 

 sorediate. The lobes are occasionally more or less white-sorediate 

 at the margins. The naked gibbi of the underside of the thallus aro 

 due to the faveolas of the upper surface ; and the rhizina? which 

 constitute the tomentum are brown, pale, or greyish. In this country it 

 is rather rare in a fertile condition. More frequently the apothecia 

 appear in an abortive state, constituting the host of Celidium stic- 

 tanim, Tul. 



Hob. On the trunks of old trees and on moist shady rocks, chiefly near 

 streams and lakes in maritime and upland districts. Distr. General and 

 common in most parts of Great Britain ; plentiful in the W. Highlands, 

 Scotland, apparently rare in S. and W. Ireland, and in the Channel 

 Islands. B. M. : La Coupe, Island of Jersey; Jerbourg, Island of 

 Guernsey. Tuubridge Wells and Lydd, Kent ; Hastings, Sussex ; Quarn 

 Wood, Ryde, Isle of Wight; New Forest, Hants; South Brent, Ivy 

 Bridge, and Dewerstone Rock, Devonshire ; Helminton, Liskeard, Tre- 

 gawn, near the Tavy and Lamorna, Cornwall ; Bryer Island, Scilly ; 

 Charnwood Forest, Leicestershire ; Malvern, Worcestershire ; Hay Cop- 



