196 Discomycetse, Exoascacese, Exoascus. 



merosissimis, globosis, octosporis 6 [x. diam.; sporidiis ellipsoideis, 



levibus 3 » 2 hyaliuis. 



Ilab. in ramis emortuis corticatis Fraxini, in Britannia? 

 3. Myxotrichum uncinatum (Eidam) Sclircet. in Kvypt. Fl. Schl. Pilze 



II, p. 212. Ita vocandus Gymnoascus uncinattis Eidam — Syll. 



VIII p. 824. 



Fam. 13, Exoascacsae Sadeb. 



EXOASCUS Fuck. — Syll. VIII p. 816, X p. 69, XI p. 435, XIV 

 p. 823, XVI p. 803. 



1. Exoascus confusus Jacz. BuU. .Tard. Imp. Bot. St. Petersburg 3848 

 I, 1901, j) 10, cum ic. — Mycelio ramoso, hyalino septato, in 

 parenchymate crescente et cuticulam perforaute, in ramis vero, 

 in stratis epidermicis nidulante, multiguttulato ; ascis hypophyllis, 

 cellulis basilaribus subrotundis vel irregularibus suffultis, oblongo- 

 cylindraceis 16-20^8-10, plerumque 6-sporis; sporidiis ovoideis, 

 continuis 5-6 « 3-4. 



Hdb. in foliis ramisque Aceris campestris, in Kachetia 

 Caucasi. 



2. Exoascus Vestergrenii (Giesenhag.) Sacc. et Syd. — Syll. XVI, 3849 

 p. 1152 (nomen), TapJirina Vesfergrenii Giesenhag. in Bot. Zeit. 

 1901, p. 152, tab. V. — Amphigena, brunnea, maturitate albi- 

 cante; mycelio inter cuticulam epidermidemque foliorum crescente; 

 ascis dense confertis, cellula basilari truncata donatis, cylindraceis, 

 apice rotundatis vel truncatis, basi attenuatis truncatisque, 25 « 6 

 octosporis; sporidiis suboblongis, 7 « 2,5-3. 



Ilab. in foliis deformatis, undulato-subbullatis Aspidii F i 1 i- 

 cis-maris, in insula Abro Sueci.c (Tycho Vestergren). 



3. Exoascus? Uleanus P. Henn. Hedw. 1904, p. 90. — Maeulis effu- 3S50 

 sis, intcrdum folium totum utrinque tegentibus, primo subfiavis, 

 dein fuscidulis subincrassatis ; ascis hypophyllis cylindraceo-sub- 

 clavatis, vertice applanatis, octosporis, ca. 30-35 « 12-15; sporidiis 

 subdistichis globosis vel subovoidcis, hyalinis intus minute gra- 

 nulatis, 6-10 » 6-8. 



Ilab. in Pteride decurrentc, Tijuca, Rio de -Janeiro Bra- 

 siliae (E. Ule). 



