134 LECANO-LECIDEEI [BILIMHIA 



Lichen aromatlcus Turn, in Sm. Engl. Bot. t. 1777 (1807). 

 Lecidea aromatica Ach. Lich. Univ. p. 16H (1810) ; S. F. Gray 

 Nat. Arr. i. p. 464; Hook, in Sm. Engl. Fl. v. p. 177 ; Cromb. 

 Lich. Brit. p. 78 pro parte ; Leight. Lich. Fl. p. 332 ; ed. 3, 

 p. 352. L. cwrnlconigricans var. /8 aromatica Tayh in Mackay 

 Fl. Hib. ii. p. 131 (1836)? Toninia aromatica Massal. Symm. 

 Lich. p. 54 (1855); Mudd Man. p. 174, t. 3, f. 64. 



Exsicc. Leight. n. 154 ; Larb. Ciesar. n. 85 ; Cromb. n. 180. 



The name aromatica was given by Turner on account of the 

 supposed fragrant scent of the plant when bruised, which however is a 

 mistake. At times the thallus occurs in small scattered patches ; the 

 apothecia are often confluent and difform. The var. liyjpsopliila Nyl. 

 ex Cromb. Lich. Brit. p. 78 (1870), wrongly printed hypnophila, has 

 a somewhat less developed thallus ; it is found on rocks in alpine 

 situations. 



Hab. On the ground among calcareous rocks and on mortar of old 

 walls in maritime and upland tracts. — Distr. Not unfrequent in 

 England, rare in Scotland, Ireland, and the Channel Islands. — B. M. 

 St. Aubin's Harbour, Jersey ; Port Gorey, Sark ; I. of Wight ; Torquay 

 and Bolt Head, Devon ; near Penzance, Cornwall ; Bathampton Hill, 

 Somerset ; Shoreham and Tillington, Sussex ; Hempstead, Gloucester- 

 shire ; Barmouth, Merioneth ; Trefriw, Carnarvonshire ; Oswestry, 

 Llanymynech Hill and Llanforda, Shropshire ; Tenby, Pembroke- 

 shire ; near Yarmouth, Norfolk ; near Koseberry and Ayton, Cleveland, 

 Yorkshire ; Teesdale, Durham ; near Appin House, Argyll ; Craig 

 Tulloch and Ben Lawers, Perthshire ; Craig Guie, Braemar, Aberdeen- 

 shire ; Cloghan near Kylemore, Connemara, Galway. 



3. B. carbonacea Jatta Syll. Lich. Ital. p. 403 (1900). — 

 Thallus brownish-black, suborbicular, rather thick, formed of 

 minute convex entire or crenate wrinkled squamules, sometimes 

 cracked-areolate. Apothecia small, black, solitary or aggregate, 

 sessile with a prominent margin, becoming immarginate ; hypo- 

 thecium thick, reddish-black ; paraphyses distinct, brownish or 

 greenish-black at the clavate apices ; spores linear-oblong, straight 

 or curved, 3-septate, 0,015-22 mm. long, 0,004 mm. thick. — 

 Toninia carbonacea Anzi Cat. Lich. Sondr. p. 68 (1860). Lecidea 

 aromatica subsp. carbonacea Cromb. Lich. Brit. p. 78 (1870). 

 L. carbonacea Leight. Lich. Fl. p. 331 ; ed. 3, p. 351. 



Differs from B. aromatica in the form and colour of the thallus, 

 and in the darker-coloured epithecium. 



Hab. On rocks. — Distr. Piare in mountainous regions in N. Scot- 

 land and W. Ireland. — B. M. Ben Lawers, Perthshire ; Achosragan 

 Hill, Appin, Argyll ; Craig Guie, Braemar, Aberdeenshire. 



4. B. squamulosa A. L. Sm. — Thallus subdeterminate, thick 

 or thinnish, squamulose, appressed, pale- or tawny-brown ; 

 squamules small, subimbricate, angular, crenate at the margins 

 (K — , CaCi — ). Apothecia small, innate-sessile, at first plane 

 and thinly margined, then convex and immarginate, black ; 

 paraphyses slender, bluish-black at the slightly clavate apices ; 



