DEMATIEI. 673 



On dead wood. July. LancasMre. 



Patches tMii, effused, finely velvety ; threads short, linear, slender, ob- 

 scurely articulated, even when most transparent ; spores of a deep rich 

 brown, varying greatly in size and length, but always more or less turbinate; 

 attenuated greatly below, obtuse above, with a sudden more or less truncate 

 apiculus, which often seems as if a joint had separated from it. Distin- 

 guished from all the other species by the peculiar shape and character of 

 the spores. —^. d; Br. 



1717. Helminthosporium oTjovatnm. Berk. " Obovate 



Helminthosporiuni." 



Flocci subulate, multi-articulate, nearly equal; spores obovate, 

 brown, biseptate. — Berk. Ann. N.H. no. 232, 1. 13,/. 19. 



On old planks exposed to wet. 



Forming a short dense velvety-black stratum, flocci very slightly attenu- 

 ated, subulate, either nearly straight, or slightly flexuous ; spores broadly 

 obovate, with two dissepiments, which divide them into three very unequal 

 articulations. — M. J. B. 



1718. Helxuinthosporiuzn delicatuluxn. Berk. ''Delicate 



Helminthosporium." 



Very delicate, flocci subulate, multi-articulate ; spores oblong, 

 obtuse, 4-5 septate, pellucid ; with an occasional vertical septum. 

 —Berk. Ann. N.H. no. 233, t. 13,/. 20. 



On stems of Umhellifers. King's Cliffe. 



Forming very delicate soft patches of scattered filaments, presenting to 

 the naked eye a cloudy black spot; flocci very slender, subulate, multi- 

 articulate, brown, paler at the tips ; spores nearly colourless, oblong, with 

 the apices very obtuse, consisting of about five swollen articulations, one or 

 two of which have occasionally a vertical dissepiment. — M.J B. 



1719. Helminthosporium sticticum. B. Sj- Br. " Grass 



Helminthosporium." 



Spots gregarious, punctiform, black ; spores oblong-clavate, 

 Tiniseptate. — ^. ^ Br. Ann. N.H. no. 758, 1. 16, f. 10. 

 On decaying leaves of grass. Batkeaston. 



Disposed in minute specks, jet black, threads fasciculate, nodose or irre- 

 gular ; spores .0016 in. long, oblong, swollen above, uniseptate. The puncti- 

 form spots, black not olivaceous hue, and uniseptate spores are the charac- 

 teristics of this species. — B. d' Br. 



1720. Helminthosporium clavariarum. Besm. " Parasitic 



Helminthosporium." 



Flocci densely aggregated, simple, very short, straight, obtuse, 

 septate, black; spores large, oblong, 1-2 septate, pellucid or 



