SPHINCTRrXA.] 



CALICIEI. 



83 



browQish or blackish, paraphyscs usually little dcTCloped ; hy menial 

 gelatine scanty. Spermogoaes punctiform, black, the sterigmata 

 somewhat simple. 



This tribe consists of rather small plants, som? of which are parasitic 

 and readily overlooked, while others are canspicuoiis from their bri^'litly 

 coloured thalli. The ap ithecia sometimes have the stipes abnormally 

 branched, and occasionally the c.ipituUiiu is proliferous. 



20. SPHINCTRINA Fr. PI. 

 gorum) ; De Xot. Giorn. Bot. It. 

 1846, p. 314.— Thallus none 

 proper. Apothecia parasitic, 

 chiefly on the thalli of Pcrtum- 

 r/<:T',globoso-turbinate, sessile or 

 substipitate, somewhat shining, 

 black, proper margin thick, 

 connivent; thecte subpersistent, 

 sporalmass black; spores simple 

 (very rarely 1-septate), black- 

 ish ; hymenial gelatine usually 

 more or less tinged with iodine. 

 Spermogones with acicular ar- 

 cuate spermatia. 



The few species belonging to 

 this genus are distinguished by 

 the apothecia being parasitic, 

 sessile or subsessile, and shinino-. 

 At first sight they look like 

 minute f 1021/1'; but theu* ana- 

 tomical structure places them 

 amono- the lichens. 



Horn. (132.3) p. 120 (ut genus Fan- 



a 



Fig. 22. 



Sphinctrina turb'mata, Fr. — a. Apothecium 

 (in dry state), X 30. h. Longitudiiml 

 section of two apothecia, X 30. c. The*!* 

 au'l paraphjses, x 350. d. Spores. 

 XoOO. e. Section of spsriuogonium, 

 X3(3. /. Sterigmata aad spermatia, 

 X500. 



1. S. turblnata Fr. Sum. Veg. (1846) p. 366.— Thallus none. 

 Apothecia small, globose or globoso-tnrbinate, shortly stipitate, or 

 often almo.st sessile, the sporal mass usually protruded ; spores 

 simple, globose or subglobose, small, 0,003-8 mm. in diameter ; 

 hymenial gelatine pale bluish, then sordid dark-coloured with 

 iodine. — Xvl. Syn. i. p. 142, t. v. f. I ; Mudd, ;5Ian. p, 2-5.5, t. iv. 

 f. 102; Cromb. Lich. Brit. p. 11; Lcight. Lich. Fl. p. 33, ed. 3, 

 p. 38. — Calicium turhiaatam Pers. Fung. Suppl. (1707) p. 59. 

 Caliciam sessile Turn. & Borr, Lich. Br. p. 128 ; Eng. Bot. t. 2520 ; 

 Sm. Eng. Fl. v. p. 1.38. Acolium stigoneUum Gray, Xat. Arr. i. 

 p. 482. Lichen gelashiatus With. Arr. ed. 3, iv. p. 8, t. 31. — Brit. 

 Exs. : Leight. n. 132 ; Mudd, n. 241. 



This is read'ly recognized upon the host by the numerous, sometimes 

 crowded apothecia, which vary somewhit in size. The spermogones, 

 scattered amongst the apothecia, are not imfrequent, with spermatia 

 0,012-15 mm. long, 0,001 mm. thick. 



ITab. On the thallus of Pertusaria communis, and sometimes of P. 

 fallax, on the trunks of old trees, chieflv oaks, in mantime and upland 



g2 



