7^ Discomycetse, Arthoniaceae, Arthonia. 



Fam. 12. Artlioiiiacoie Rehm. 



LECIDEOPSIS Almq — Syll. X p. 76. 



1. Lecldeopsis callfornica Rehm, Ann Mycol. VII (1909) p. 534. — 6861 

 Ascomatibus in cortice late dealbato dispersis, sessilibus, orbicula- 

 ribus, subconvexulis, nigro-fuscis, 0,1-0,2 mm. diam., haud mar- 

 ginatis neque excipulo cinctis, siccis planis ; ascis ovoideis, apice 

 incrassatis, 30-35 « 15, 8-sporis; sporidiis oblongo-clavatis, medio 

 subconstrictis, utrinque obtusis, guttulis minutissimis repletis, hya- 

 linis, 12-15 5^5; paraphysibus conglutinatis, apice incrassatis, epi- 

 thecium fusco-csBruleum formantibus; hypothecio hyalino sine go- 

 nidiis; jodii ope hymenio creruleo-tincto. 



Hdb. ad caules emortuos Baccharidis viminene in monti- 

 bus prope Claremont Calif. Amer. bor. (0. F. Baker). — L. ga- 

 lactiti proxima. 



2. Lecideopsis ? caeruleo-atra von Hohnel, Fragm. Myk. VII (1909) 586 

 in Sitzb. k. Ak. d. Wiss. Wien, CXVIII, Abt. T, pag. 880. — 

 Ascomatibus immarginatis, nigro-opacis, hemisphoericis, superficia- 

 libus, 200-350 ;i. lat., circ. 120 [j., cr., concentrice subctespitosis v. 

 gregariis, ssepe concrescentibus ; excipulo nullo ; contextu cartila- 

 gineo-gelatinoso, nigro-cyaneo; ascomatibus plectenchymaticia ; hy- 

 pothecio nigro-cyaneo usque ad 40 a. cr., minute parenchymatico ; 

 paraphysibus radiatim dispositis simplicibus v. ramosulis, 4-5 a. 

 latis, distincte septatis, supra epithecium tenuem nigrum effor- 

 mantibus; ascis octosporis, ex ovoideo subglobosis, basi in pedicel- 

 lum filiformem 20-30 a. long. abrupte contractis, crasse tunicatis, 

 50-60*28; sporiiliis conglobatis, bilocularibus. e hyalino lenissime 

 brunneolis, elongato-elhpsoideis. ad septum vix constrictis, apice 

 rotundatis, contentu granuloso, tenuiter tunicatis, extus mucosulis, 

 20-24 ^ 7-8. 



Hdb. in cortice levi arborum, prope Buituba Sao Paulo Bra- 

 sili;c (Wettstein et Schiffner). 



ARTHONIA Ach. — Syll. X p. 77. 



1. Arthonia punctiformis Ach. — Syll. X, pag. 77 — var. populina B8G 



(Mass.) Sacc. et Trav. — Syll. XX, pag. 1189, — Arthonia po- 

 pvlina Mass., Ric. Lich. crost. pag. 50, fig. 91; Jatta Mon. Lich. 



