rs 



COLLEilACRI. 



[cOLLEMOrsiS. 



1. C. Schsereri Xyl. e.v 

 Cromb. Journ. Bot. 1S74, 

 p. 332. — Thallus subeffuse, 

 thinnish,areolato-grauulose,or 

 minutely granuloso-squamu- 

 lose, browuisb-black or black- 

 ish. Apothecia small or nearly 

 moderate, plane, lecanorine 

 (with distinct thalline margin), 

 brownish- or reddish-black ; 

 spores ellipsoid, 0,014— 21mm. 

 long, 0,007-11 mm. thick ; 

 hymenial gelatine pale blue 

 and then tawny with iodine. 

 — Leight. Lich. Fl. ed. 3, 

 p. 25. — Pyrenopsis Schcvreri 

 Xyl. olim, Cromb. Lich. Brit, 

 p. 2; Leight. Lich. Fl. p. 15. 

 Pannaria Sch'creri ^ass. Ric. 

 Aut. Lich. (1852) p. 114.— 

 £rit. Ej;s. : Cromb. n. 2, 



Fig. 20. 



Collenwpsis Schareri, Nvl- — n Section of a 

 small portion of the thallus, x200. b. 

 Gonimia, x350. c. Section of an apo- 

 thecium, X'30. d. Theca with a para- 

 phTsis. x350. e. Spores, XoOO. /. 

 Sterigmata and apermatia, X 500. 



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

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

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

 nearly obliterating the thaUus, smaller, and becoming somewhat convex 

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

 tent margin in the best developed conditions. 



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

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

 Central Ensrland, amongst the Central and X. Grampians of Scotland, 

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

 Surrey : Bathampton Downs andBabingtou. Somersetshire ; Chalf jrdand 

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

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

 Aberdeenshire. Kylemore, co. Galway. 



2. C. lecanopsoides Xyl. 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— 

 8n8e, ellipsoid, 0,012-20 mm. long, 0,006-11 mm. thick, paraphyses 

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

 Lich. Fl. ed. 3, p. 35. — Pyrennpsis hcunopisoides Xyl. Flora, 1866, 

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

 Leight. Lich. Fl. p. 15. CoUema p)yr€nopsoid<:S Xyl. Mem. Soc. 

 Cherb. v. p. 89 ; Svn. i. p. 203. Lecanora pyrenopsoides X"yl. Bot. 

 Not. (1853) p. 163^ 



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

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



