lecidea] lecideace^ 105 



Hah. Parasitic on Solorina hispora. Collected by Dr. Stirton on 

 Ben Lawers, Perthshire. 



200. L. insita Stirton in Scott. Nat. 1879, p. 17.— ThalJus 

 none. Apothecia black, small, convex, immarginate, generally 

 nearly spherical, internally rufescent ; hypothecium reddish or 

 reddish-black ; paraphyses distinct, slender, filiform, reddish or 

 almost colourless at the apices; spores 12-16 in the ascus, 

 spherical ; hymenial gelatine intense-blue then deep-wine-red 

 with iodine. — Leight. Lich. Fl. ed. 3, p. 545. Specimen not 

 seen. 



Hah. Parasitic on Peltidea aj^hthosa. Collected by Dr. Stirton 

 at Craig-na-Lochan, Scotland. 



§ iv. Mycoblastus Th. Fr. Lich. Scand. p. 479 (1874) ; Norm, 

 in Nyt. Mag. Nat. vii. p. 250 (1852) as genus. (PI. 8.) 



Thallus crustaceous. Spores usually 1, rarely 2 or 3 in the 

 ascus ; spermogones with simple sterigmata and straight 

 spermatia. 



201. L. sanguinaria Ach. Meth. p. 39 (1803) & Lich. Univ. 

 p. 170. — -Thallus efiuse, moderate or thickish, granulose-unequal 

 or granulose-concrescent, greyish-white or whitish (K -\- yellow, 

 CaCl — ) ; medulla blood-red beneath the apothecia. Apothecia 

 adnate, moderate or somewhat large, convex, immarginate, black, 

 greyish within ; paraphyses concrete, dark-bluish at the apices ; 

 hypothecium thin, pale or slightly dark ; spores solitary, very 

 large, vvdth a broad epispore, 0,070-0,100 mm. long, 0,028-38 

 mm. thick ; hymenial gelatine, especially the asci, deep-blue with 

 iodine. — Hook. Fl. Scot. ii. p. 37 ; S. F. Gray Nat. Arr. i. 

 p. 464 ; Hook, in Sm. Engl. Fl. v. p. 177 ; Tayl. in Mackay Fl. 

 Hib. ii. p. 120; Cromb. Lich. Brit. p. 93 ; Leight. Lich. Fl. 

 p. 365; ed. 3, p. 262. Lichen sanguinarius L. Sp. PI. p. 1607 

 (1753); Huds. Fl. Angl. p. 442 pro parte; Lightf. Fl. Scot. ii. 

 p. 803 pro parte; Engl. Bot. t. 155; With. Arr. ed. 3, iv. p. 6. 

 Megalosjpora sanguinaria Massal. Ric. Lich. p. 106 (1852); Mudd 

 Man. p. 213, t. 4, f. 79. 



Exsicc. Bohl. n. 46; Leight. n. 307; Mudd n. 184; Cromb. 

 n. 94. 



Easily recognized by the blood-red colour of the medulla under 

 the apothecia which at times is also visible elsewhere in the thallus, 

 in which case it is form joolyerythrina N^d. ex Th. Fries Lich. Scand. 

 p. 480. The thallus varies somewhat in thickness according to the 

 nature of the substratum, and when muscicolous is usually rather 

 thin. The apothecia are numerous, scattered or crowded, sometimes 

 confluent and difform ; in our specimens a few occasionally appear as 

 if crowned by the well-developed thallus, showing a transition to var. 

 lecanoroidea Nyl. Lich. Jap. p. 77. The not unfrequent spermogones 

 are very minute, punctiform, black, with spermatia shortly acicular, 

 0,006-9 mm. long, 0,001 mm. thick. 



