DBRMATOCARPON] DEEMATOCAEPACEiE 267 



101. DBRMATOCARPON Eschw. Syst. Lich. p. 21 (1824) 

 emend. ; Th. Fr. Lich. Arct. p. 252 (1860). (PI. 37.) 



Thallus leafy or squamulose, corticated on both surfaces or 

 only on the upper surface, sometimes with rhizinse. Algal cells 

 Pleurococcus. Peritheoia simple, immersed in the thallus, globose 

 or ovate, with a projecting ostiole ; paraphyses usually mucila- 

 ginous and cohering, or sparingly developed and branched ; asci 

 8-16-spored; spores simple, colourless. Spermogones divided into 

 hollow chambers, opening by a sUt. 



1. D. miniatum Th. Pr. Lich. Arct. p. 253 (I860).— Thallus 

 spreading, ashy-grey or whitish, leafy, peltate, coriaceous, rather 

 large, rounded or somewhat crenate-lobate, smooth or minutely 

 granular-pruinose, attached by a central point to the substratum, 

 the under surface tawny or brownish, smooth or wrinkled. 

 Perithecia minute, numerous, immersed, with a prominent brown 

 ostiole ; spores 8 in the ascus, oblong or ellipsoid, 0,010-16 ram. 

 long, 0,006—9 mm. thick. — Lichenoides coriaceum nehulosum 

 cinereum punctatum, suhtusfulvum Dill. Hist. Muse. p. 223, t. 30, 

 f. 127b. (1741). Lichen miniatus L. Sp. PI. p. 1149 (1758); 

 Huds. Fl. Angl. p. 454 ; Lightf. Fl. Scot. ii. p. 857 ; With. Arr. 

 ed. 3, iv. p. 66 ; Engl. Bot. t. 593, two upper figs. Endocarpon 

 miniatum Ach. Meth. p. 127 (1803); S. P. Gray Nat. Arr. 

 i. p. 501 ; Hook. Fl. Scot. ii. p. 44 & in Sm. Engl. Fl. v. p. 156 

 pro parte ; Grev. Fl. Edin. p. 329 ; Tayl. in Mackay Fl. Hib. ii. 

 p. 98 pro parte; Mudd Man. p. 265; Cromb. Lich. Brit. p. 107 

 pro parte; Leight. Lich. Fl. p. 409; ed. 3, p. 441. E. miniatum 

 var. umbilicatum Hook, ex Leight. Angioc. Lich. p. 11, t. 1, f. 4 

 (1851). 



Exsicc. Dicks. Hort. Sice. n. 24 ; Bohl. n. 1 ; Leight. n. 26 ; 

 Mudd n. 255; Larb. Lich. Cajsar. n. 94; Cromb. n. 100; Johns. 

 n. 400. 



Hab. On dry rocks in maritime or mountainous districts. — Distr. 

 Somewhat common throughout the British Isles. — B. M. L'Etaoq, 

 Beaufort and Bezel Tower, Jersey ; Petit-Bot Bay, Guernsey ; Tintagel 

 and Pentire, St. Minver, Oomwall ; Torquay, Ilsham and near Cock- 

 ington, Devon ; Leigh Wood and Cheddar Cliffs, Somerset ; St. Vin- 

 cent's Eocks, Gloucestershire; Manorbeer Castle, Pembrokeshire; 

 Harlech Castle, Merioneth; near Conway, Carnarvonshire; near 

 Beaumaris, Anglesea ; Puffin Island ; Miller's Dale, Derbyshire ; 

 Trowgni, Clapham, Yorkshire ; Rokeby, Durham ; Egremont, Cumber- 

 land ; Falls of Clyde, Lanarkshire ; Craiglockhart, near Edinburgh ; 

 Bowling, Dumbartonshire ; near Dunkeld, Kenmore and Glen Lochay, 

 Perthshire ; I. of Lismore, Argyll ; Craig Guie, Braemar, Aberdeen- 

 shire ; near Glencorbot and Kylemore, Connemara, Galway. 



Var. leptophyllum Dalla Torre & Sarnth. Fl. Tirol, p. 503 

 (1902). — Thallus small, peltate, solitary or of several lobes, 

 greyish or dark-brown, the under surface dark-coloured. — Lichen 

 leptophyllus Ach. Lich. Suec. Prodr. p. 141 (1798); Engl. Bot. 

 t. 2012, f. 2. Endocarpon leptophyllum Ach. Meth. p. 127 (1803) ; 



