Pyrenomycetae, Sphseriacese, Phseodidymae, Didymosphaeria. 679 



Hab. in ramis decorticatis Populi canadensis, Luxemburg. 

 — Var. Frangulae Feltg. 1. c. — A typo differt peritheciis plo- 

 rumque seriatis, macula stromatica circa ostiolum magis expansa, 

 ascis 52-70^6-9, tereti-clavatis ; sporidiis monostichis, non con- 

 strictis, biguttatis, brunneis 8-11 « 5-6 et paraphysibusnon (?) ra- 

 mosis. In ramis decorticatis Rhamni Frangul;i-, Luxemburg. 



10. Didymosphaeria subcorticalis Feltg. Vorstud. Pilz. Luxemb. 1901, 2310 

 Nachtr. II, p. 173. — Peritheciis gregariis, immersis, ostiolo conico 

 per epidermidem circum circa atratam erumpentibus; ascis .... 

 non visis; sporidiis ellipsoideis, utrinque tenuatis, bi-cellularibus, 

 bi-guttatis, brunneis, 15-18 « 5. 



Hab. in pariete interiore corticis Salicis albte, Luxemburg. 



11. Didymosphaeria nana Rostrup — Syll. IX, p. 730. — var. bra- 231] 

 chyspora Sacc. Cfr. Harrim. Alaska Exped. Crypt. p. 30. — A 

 typo differt; sporidiis paullo brevioribus, nempe 18-20 * 6,5-7,5 

 nec 25 « 7-8. 



Hdb. in foliisAlni, Port Vells Alaska (Trelease). 



12. Didymosphaeria minuta Niessl. — Syll. I, p. 715. - var. Pseudo- 2312 

 Acori Feltg. Vorstud. Pilz. Luxemb. 1901, Nachtr. II, p. 175. — 



A typo differt, ascis minoribus nempe 34-40 v 5-6 sporidiisque 

 multo minoribus, nempe 7-8 v 2,5-3, profunde constrictis, brun- 

 neolis, bi-guttulatis. 



Hab. in caulibus et pedunculis Iridis Pseudo-Acori, Lu- 

 xemburg. 



13. Didymosphaeria Clementsii Sacc. et D. Sacc. Phorcys minutus Cle- 2313 

 ments in Bull. of the Torr. Bot. Cl. 1903, p. 84, nec l)id. minuta 

 Niessl. — Peritheciis solitariis, copiosis, raro subgregariis, primi- 



tus tectis, deinde epidermidem nigricantem pertusis, submembra- 

 naceis, depresso-globosis, ostiolo depresso, rugulosis, atro-brunnois, 

 minutis 85-150 \l. diam.; ascis 6-8-sporis, irregulariter clavatis, 

 brevibus, ad basim attenuatis 80 ^ 16-18; paraphysibus Linearibus, 

 paucis; sporidiis monostichis, sursum distichis, oblongo-ellipticis, 

 uni-septatis, ad septum constrictis, levibus, brunneis, bi-guttulatis 

 13-16 « 6-7. 



Hdb. ad folia vetusta exsiccataque Yucca 1 glauoae, Crosa 

 Ruxton Amer. bor. 



14. Didymosphaeria Feltgeni Syd. Ann. Myc. 1903, p. 177, 1). Typhcn 2314 

 Feltg. Vorstud. Lux. Nachtr. II, p. 172, noc Peck. — Peritheciis 

 gregariis, immersis, globosis, basi applanatis, ostiolo brcvitor c\ 

 lindraceo-conico per epidermidem erumpcntibus, atro-brunneis 200 



