Pyrertomycetse, Perisporiacese, Perisporiese, Dimerium. 537 



1. Neorehmia ceratophora v. Hohnel 1. c. — Peritheciis sparsis, globo- 1813 

 sis, minutis, 120-160 [x. latis, ex olivaceo nigrescentibus, subcarnosis, 

 tenuibus, ubique pilis non septatis, rigidis, brevibus, 20-25 « 2-3, 

 vel simplicibus vel apice magis minusve denticulatis vel ramosis 

 obtectis; ostiolo nulio v. obsoleto; paraphysibus parcis, filiformibus ; 

 ascis tenuissimis, clavatis, 40-45 v 4-6 octosporis ; sporidiis subdi- 

 stichis vel oblique monostichis, oblongis, 4^2, hyalinis, e cellulis 

 binis, globosis, facile jamque ipso in asco se separantibus formatis. 

 Hab. in ligno putrido Carpini?, Viehoferin Austrise inferioris. 



Sect. 4. Phieodidymie. 



DIMERIUM Sacc. et Syd. — Syll. XVI p. 410 (ut subgenus) (Etym. 

 dis bis et meros pars, ob sporidia bilocularia). A Dimerosporio 

 differt sporidiis coloratis nec hyalinis. — Huc spectant plures species 

 jam huic postremo generi relatse, nempe: Dimerium Fumago (Niessl), 

 D. Psilostomatis (Thiim.), D. oligotrichum (Mont.), D. Langloisii 

 (E. et M.), D. Ulei (Wint.), D. imperspicuum (Speg.), D. lateri- 

 cium (Speg), D. Passiflone (Pat.), D. Monnince (Pat), D. Ri- 

 chardii (Thiim.), D. Barnadesiai (Pat.), D. spectabile (Pat.), D. mo- 

 niliferum (Pat.), D. Labiatarum (Pat), D. Gilgianum (P. Henn.), 

 D. secedens Sacc, D. minutum (Pat.), D. Magnoliai (T. et E.), D. 

 baccharidicolum (P. Henn.), D. Englerianum (P. Henn.), D. For- 

 steroniai (P. Henn.), D. hamatum P. et Sacc, D. pangerangense 

 (P. Henn.), D. tasmanicum (Massee), D. occultum (Rac.j. 



1. Dimerium orbiculatum (Mc Alp.) Sacc. et D. Sacc. Dimerosporium 1814 

 orbiculatum M. Alp. in The Linn. Soc of N. S. Wales, 1903, 

 pag. 97. — Maculis numerosis, orbicularibus, fuligineo-nigris, epi- 

 phyllis, interdum confluentibus, 2-3 mm. diam ; hyphis pallide 

 olivaceis, circ 7 \i. cr., ramulosis; conidiis concoloribus, 1-septatis, 

 paullo constrictis, 15-17^8-9, pucciniaeformibus; ascis clavatis, 

 sessilibus, superne rotundatis, octosporis, 95-105 v 24-28; paraphy- 

 sibus hyalinis, filiformibus, superne ramosis, asco sub.cquilongis; 

 sporidiis distichis ad basim monostichis, olivaceis, subovalibus, 1-se- 

 ptatis, superne rotundatis, 30-35 « 10-11, cellula superiori crassiori. 



Hab. in foliis vivis Grevillese Victoriaj in Victoria Au- 

 stralise. 



2. Dimerium erysiphinum (P. Henn.) Sacc et D. Sacc. Dimerospo- 1815 

 rium erysiphinum P. Henn. in Ergebn. der Kunene Sambesi Ex- 

 pedit. p. 164 ^1902). — Mycelio hypophyllo effuso, radiante albo, 



