360 YORKSHIRE NATURALISTS UNION. 



2540. Chondrioderma physarioides Rost. 

 N.W. — Rokeby, on rotten wood (F.F. '04). 



DIDYMIUM Schrad. 



2541. Didymium fapinaceum Schrad. [D. melanopus^ 

 Fr. ; D. hemisphericwn Fr. ; etc.] . 



N.E. — Scarboro' (Mass., Mon. Myx., p. 219, pi. 2, figs. 29-35).. 



S.W. — Swinefleet (Lees' Fl.). Huddersfield (F.F. '95). 

 Ovenden ; Hebden Bridge ; Barkisland ; Skircoat ; Elland,. 

 on bark, leaves, wood, etc. (Fl. Hx.). Sowood, Dewsbury, 

 in a colony of about 500 fructifications, equally distributed 

 over 10-12 square inches, which they had built on the under 

 surface of a blue roofing slate resting on decayed wood, 

 troughing on an outhouse, May '02 (P. F. Lee). 



Mid W. — Leeds district (Lees' Fl.). Selby '03. 



N.W. — Masham, on leaves and moss (' Nat.' May '03). 



2542. Didymium squamuiosum Fr. 



Common on rotten wood, leaves, especially sycamore, moss,, 

 etc., and very variable. Distribution general. Recorded for 

 all the county divisions. 



2543. Didymium microcarpon Rost. [Physarnm micro - 

 carpon Fr. ; P. nigripes Link ; D. nigrip-es Fr. ; etc.] . 



N.E. — Scarboro' (Tr. iv.). Egton Bridge (F.F. '02).. 

 Oxdale, on wood (*' Nat.' Jy. '04). Mulgrave Woods (Tr. 

 B.M.S. '05). 



MiD,W. — Church Fenton; Leeds district (Lees' Fl.). 



S.E.— Pond Wood, Boynton (W.W.S.). 



S.W, — Owston, on twigs, leaves, etc. (F.F. '99). 



2544. Didymium spumarioides Fr. [CJiondrioderma 

 spmnanoides Rost. ; C stromatewn Rost. ; etc.] . 



N.E. — Scarboro', on leaves, moss, etc. (Mass., Mon. Myx.).. 



2545. Didymium serpula Fr. 



N.E. — Scarboro', on leaves (Mass., Mon. Myx., p. 234, pi. 2,. 

 figs. 55-57). Mulgrave Woods (F.F. 1900). Egton Bridge '02. 

 S.W. — Bingley, on dead leaves (Lees' Fl.) 



2546. Didymium confluens Rost. [D.cvustaceum Vr.y 

 N.E. —Castle Howard (Mass., Mon. Myx,). Bulmer. 



Trans. Y.N.U., 1905 (pub. 1905). Bot. Series, Vol. 6. 



