COLLEMACEI. 



TCOLLEMOPSIS. 



1. C. Schareri Nyl. ex 

 Cromb. Journ. Bot. 1874, 

 p. 332. Thallus subeffuse, 

 thinnish,areolato-grauulose,or 

 minutely granuloso-squamu- 

 lose, brownish-black or black- 

 ish. Apothecia small or nearly 

 moderate, plane, lecanorine 

 (with distinct thalline margin), 

 brownish- or reddish-black ; 

 spores ellipsoid, 0,0 14-2 1mm. 

 long, 0,007-11 mm. thick; 

 hymenial gelatine pale blue 

 and then tawny with iodine. 

 Leight. Lich. Fl. ed. 3, 

 p. 25. Pyrenopsis Schaireri 



Fig. 20. 



Nyl. olim, Cromb. Lich. Brit. Collemopsis Sohareri, Nyl. a Section of a 

 o T^rV,f Ti/>i 171 n 1 s: small portion of the thallus, X200. 6. 

 p. 2; Leight Lich. 11. p. 15. Goniin | a; x350 c> gecfcioa of an apo . 



Pannana bch'ttreri Mass. ttic. theoium, x30. d. Theca with a para- 

 Aut. Lich. (1852) p. 114. phyeis, X350. e. Spores, X500. /. 

 Brit. Exs. : Cromb. n. 2. Sterigmata and spermatia, x500. 



This is often less developed, with the thallus granulose and diffract, 

 though when fully developed it is more squamulose and continuous. The 

 apothecia, for the most part, are very numerous and crowded, sometimes 

 nearly obliterating the thallus, smaller, and becoming somewhat convex 

 and immarginate in the less developed, or moderate, plane, with persis- 

 tent margin in the best developed conditions. 



Hab. On cretaceous pebbles and limestone walls and rocks in moist 

 shady upland situations. Distr. Local, though plentiful, in S., W., and 

 Central England, amongst the Central and N. Grampians of Scotland, 

 and in N.W. Ireland. B. M. : Maidstone, Kent ; Box Hill and Shiere, 

 Surrey ; Bathampton Downs and Babingtou, Somersetshire ; Chalfordand 

 near Cirencester, Gloucestershire ; Buxton, Derbyshire ; Egremont, Cum- 

 berland. Craig Tulloch, Blair Athole, Perthshire ; Craig Guie, Braemar, 

 Aberdeenshire. Kvlemore, co. Galway. 



2. C. lecanopsoides Nyl. ex Cromb. Journ. Bot. 1874, p. 332. 

 Thallus thin, opaque, granuloso-areolate, or nearly continuous, some- 

 what scabrous, dark-brown or brownish-black. Apothecia small, 

 urceolate, concolorous, the margin prominent, connivent; spores 4- 

 8nae, ellipsoid, 0,012-20 mm. long, 0,006-1 1mm. thick, paraphyses 

 slender, not crowded ; hymenial gelatine bluish with iodine, Leight. 

 Lich. Fl. ed. 3, p. 35. Pyrenopsis lecanopsoides Nyl. Flora, 1866, 

 p. 374; Carroll, Journ. Bot. 1867, p. 254; Cromb. Lich. Brit. p. 3; 

 Leight. Lich. Fl. p. 15. Collema pyrenopsoides Nyl. Mem. Soc. 

 Cherb. v. p. 89 ; Syn. i. p. 203. Lecanofa pyrenopsoides Nyl. Bot. 

 Not. (1853) p. 163. 



This, as Nylander observes (Syn. p. 103), is at first sight not unlike 

 C. fuliginea (Wahl.), and also has considerable resemblance to obscure 



