LECAXORA.] LECAXO-LECIDEEI. 481 



P. Apothccia lecanoriiie, more or loss immersed ; thecae myrio- 

 spored ; spores (very rarely 8-.32na)) simple, usually small, 

 colourless ; hymenial gelatine variously tinged with iodine. 

 Spermogoncs with simple sterigmata and minute oblongo- 

 ellipsoid spermatia. {Acarospora Mass. Rich. (1852) p. 27 

 pro maxima parte.) 



182. L. glaucocarpa Ach. Vet. Ak. Handl. (1810) p. 151.— 

 Thallus squamulosc, opaque, pale-livid or lurid-brown, white 

 beneath : squamules somewhat erect or depressed, thickish, scattered 

 or rarely subimbricate, free and crenate at the margins (K — , 

 CaCl — ). Apothccia somewhat large, nearly plane, ctesio-pruinose 

 or naked, thick, reddish-brown ; the thalline margin thick, entire ; 

 spores oblongo-bacillar, 0,003-0 mm. long, 0,0015-25 mm. thick ; 

 hymenial gelatine intensely and persistently bluish with iodine. — 

 Cromb. Lich. Brit. p. 50 ; Leight. Lich. Fl. p. 182, ed. 3, p. 168. — 

 Lichen (flaucocarpus AVahl. Vet. Ak. Hundl. 1806, p. 143, t. iv. f. 4. 



A well-marked plant easily recognized by the characters of the thalline 

 squamules and of the apothecia. In the British specimens the thallus is 

 somewhat scattered, at times little developed and visible chiefly around 

 the apothecia (form discreta, Krempelh. Lich. Fl. Bayer, p. 17). These 

 are occasionally somewhat aggregate with the margin flexuose. It is a 

 somewhat variable plant, of which the British forms may be included 

 under the variety that follows. 



Hab. On calcareous and schistose rocks in mountainous regions. — 

 Distr. Local in N. England and on the Grampians, Scotland. — B. M. : 

 Craig-v-Rhiw, Oswestry, Shrophire; Teesdale, Durham. Ben Lawers 

 and Craig Tulloch, Perthshire : Craig Guie, Braemar, Aberdeenshire. 



Var. /3. depauperata Cromb. Journ. Bot. 1873, p. 134 ; Grevillea, 

 xix. p. 58. — Thallus obsolete. Apothecia sublecideine, variable in 

 size, naked or pruinose, scattered or crowded, the margin more or 

 less thickish. — Leight. Lich. Fl. ed. 3, p. 169. — Acarospora cervina y. 

 glaucocarpa ^depauperata Koerb. Syst. Lich. Germ. (1855) p. 155. 



Confluent with less developed states of the type, but differs in being 

 ecrustaceous and in the variable apothecia. According to the differences 

 in these it presents two well-marked forms. 



Form 1. pruinifera Cromb. Grevillea, xix. (1891) p. bS. — 

 Apothecia moderate, scattered or crowded, caesio-pruinose, the 

 margin entire or undulate. — The trivial name pruiaosa given to 

 this by Krempelhuber (Lich. Fl. Bayer. (1861) p. 172) is not to be 

 retained, having been previously applied to an allied species. 



Characterized by the pruinose apothecia, which give it much the 

 appearance of L. pndnosa (Sm.) Nyl. Wlien more crowded they often 

 become angulose. 



Hab. On calcareous rocks in mountainous districts. — Distr. Only 

 sparingly on the Central and N. Grampians, Scotland. — B. M. : Craig 

 Tulloch,' Blair Athole, Perthshue ; Craig Guie and Morrone, Braemar, 

 Aberdeenshire. 



2i 



