2SO LICHEXACEI. [SOLORINA.. 



which at length forms an evanescent margin. All the species are normally 

 temcole, the thallus being closely adnate to the ground. With the excep- 

 tion of S. octospora, all the 

 European species have been 

 found in Britain. 



1 . S. crocea Ach. Lich. 

 Univ. (1810) p. 149. 

 Thallus orbicular, thickish, 

 appressed, more or less 

 smooth, laciniato - lobed, 

 undulate at the margin, 

 dark-greenish when moist, 

 reddish- or cinnamon- 

 greyish when dry ; be- 

 neath (as also the medulla) 

 deep orange- or saffron- 

 coloured, villoso - nervose, 

 indistinctly subrhiziuose. 

 Apothecia moderate, plane, 

 rotundate or oblong, tumid, 

 dark brownish- red ; spores 

 6-8na3, oblong or fusi- 

 formi - oblong, brownish, 



0,035-45 mm.long, 0,010- 



saccata Ach. a. Gomdimia, XooO. 

 ^1^^X850. , Three 



Scot. ii.p. 36: Sir, Eng. 

 Fl. v. p. 214 ; Mudd, Man. p. 85 : Cromb. Lich. Brit. p. 29 ; Leight. 

 Lich. Fl. p. 112, ed. 3, p. 106. Lichen croceus Linn. Fl. Suec. 

 (1755) p. 1 101 ; Lightf. Fl. Scot. ii. p. 856 ; Huds. Fl. Angl. ed. 2, 

 p. 548 ; With. Arr. ed. 3, iv. p. 68 ; Eng. Bot. t. 49. Liclienoides 

 subtus croceum, peltis appressis Dill. Muse. 211, t. 30. f. 120. 

 Brit. Exs. : Cromb. n. 46 ; Dicks. Hort. Sic. n. 50. 



A beautiful plant, readily distinguished by the saffron-colour of the 

 underside of the thallus, which, even when growing, is generally per- 

 ceptible from the margins being more or less subfree and upturned. The 

 apothecia are at first slightly immersed and rounded, then plane, oblong, 

 and at length diff orm and somewhat large. On the thallus is occasionally 

 seen the parasitic fungus, Sphceria lichenicola DeNot. 



Hal. On the ground, and in fissures of rocks and boulders in alpine 

 places. Distr. Rather local and scarce towards the summits of some of 

 the higher Scottish Grampians, abundant on the top of Ben Lawers ; very 

 rare on the nits, of S.W. Ireland. B. M. : Ben Lomond, Stirlingshire; 

 Ben More, Benteskerney and Ben Lawers, Perthshire ; Clova Mts., For- 

 farshire ; Lochnagar, Morrone, Ben-naboord,and Ben Macdhui, Aberdeen- 

 shire ; Ben Nevis, Inverness-shire. Brandon Mts., co. Kerry. 



2. S. saccata Ach. Lich. Univ. (1810) p. 149. Thallus orbi- 

 cular, submembranaceous, smooth or subsmooth, lobato-divided, 

 pale-greyish or pale-brownish, occasionally white-pruinose ; beneath 



