282 



LICHENACEI. 



[SOLORINA. 



S. Grampians, Scotland (where it is plentiful) ; rare in N.E. Ireland. 

 B. M. : Buxton Dale, Derbyshire ; Whernside and Guisboro' Moor, Cleve- 

 land, Yorkshire ; Teesdale, Durham ; near Keudal, Westmoreland. Fin- 

 larig, Killin, near Tumniel Bridge and Craig Tulloch, Perthshire. Glen- 

 aritf, co. Antrim. 



4. S. bispora Nyl- S )" n - ' l - (I860) p. 331, t. 8. f. 42. Thallus 

 orbicular, somewhat small, subcoriaceous, subsmooth, lobato-divided, 

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

 spongioso-tomentose, with long scattered rhizinse ; lobes rounded or 

 incised and somewhat crenate at the margins. Apothecia urceolato- 

 depressed, small or moderate, brown or dark-brown, immarginate ; 

 spores 2nae, reddish brown, ellipsoid, 0,065-88 mm. long, 0,033- 

 42 mnv thick. Stirt. Grevillea, ii. p. 60 ; Cromb. Journ.Bot. 1874, 

 p. 147 ; Leight. Lich. Fl. ed. 3, p. 107. 



This differs from S. saccata in the white-pruinose thallus, the two-spored 

 thecae, and the much larger spores. The thallus is also rather smaller, 

 often somewhat rugulose, and thicker; and the apothecia are usually 

 smaller. A variety limbata, described in Nyl. Syn. /. c., which is 

 analogous to S. sponyiosa, has not been detected in Great Britain. 



Hub. On the ground in alpine districts. Distr. Local and rare on the 

 S. Grampians, Scotland. B. M. : Ben Lawers, Perthshire. 



Subtribe II. PELTIGERINEI Nyl. Flora, 1882, p. 457 ; 

 1884, p. 219. 



Thallus destitute of cephalodia ; gonidial layer consisting of 

 gonimia. Apothecia and spores variable as in the tribe. 



This also contains three 

 genera Npphromium, Pelti- 

 f/era, and Solorinina parallel 

 to those of the preceding 

 subtribe, except that the thal- 

 lus is gonimiose and without 

 cephalodia. Solorinina is 

 exotic. 



Sl.NEPHROMIUMNyl. 



Mem. Soc. Cherb. v. (1857) 

 p. 101 (nota); Syn. i. (1860) 

 p. 318. Thallus fragile, 

 naked or villose beneath, 

 the cortical layer there 

 continuous and nerveless ; 

 gonidial layer with the 

 gonimia usually moniliform. 

 Apothecia reniform, adnate 



Fig. 50. 



to the lower surface of the Nephromium lavigatum Nyl. a. Section of 



margin of the thallus, with thallus, x 200. b. Two syngonimia, 



thalline margin ; thecse cla- * 35a c - The ^ and paraphysis, x350. 



vate; Sp ore 9 8n ffi , (l)-3- i^jS^ '$*?!& 



septate, fusiformi-oblong, and spermatia, x 500. 



