1894.] NATURAL, SCIENCES OF PHILADELPHIA. '^81 



Hypophyllous, on dead blackened parts of the leaves. Hyphte 

 loosely tufted, subeffused, simple, clavate, continuous, 15—30 x 4", 

 yellowish to the naked eye, nearly hyaline under the microscope. 

 Conidia, 1-3- septate, hyaline, 15-60 x 4—6;j. 



The shorter ones are cylindrical and mostly 1-septate, and resemble 

 the conidia of Ramularia Actaxi', but the longer ones are narrowed 

 above and 3- (or more- ) ? septate. 



Cercospora Briareus E. & E. 



On leaves of Acerates viridifiora, near Elkton, Md., Aug. 1894 

 (Commons, No. 2,537). 



Spots amphigenous, dull livid-purple, small, subelongated, 1-3 x 1 

 mm., subindefinite or partly limited by the veinlets. Hyphae am- 

 phigenous, loosely tufted, spreading, subundulate, simple, equal, 

 olive-brown, continuous or 1-3-septate, obtuse, 35-45 x 5-6;/. 

 Conidia slender, 40-80 x 32-4^//., 6-8-septate, nearly straight, 

 slightly brownish. 



The spots, especially on the under side of the leaf are not per- 

 ceptible; the hyphiB spreading over green areas of the leaf enclosed 

 by the veinlets. 

 Heterosporium eaiilicolum E. & E. 



On dead stems of Rumex occidentalis, North Park, Colo., July, 

 1894 (Prof. C. S. Crandall, No. 72). 



Tufts effused. Hypha? cespitose, stout, olive-brown (under the 

 microscope), septate, torulose, subgeniculate above, 80-110x4-5//. 

 Conidia elliptical or oblong, pale yellowish- brown, 1-3-septate, 12- 

 26 (mostly about 15) x 7-1 Ov, minutely echinulate-roughened. 

 Appears like a coarse, black pubescence on the stems. 



Heterosporium sphseriseforme E. & E. 



On dead stems of Eriogomm, Fort Collins, Colo. (C. F. Baker, 

 No. 270). 



Hypha? as in H. caulicolum E. & E. but not as rigid and collected 

 in dense, scattered, olivaceous, sphserioeform, tufts i-l mm. diain., 

 resembling a Fuccinia or Sphceria. Conidia elliptical or oblong, 

 1_4. f mostly 1-2- ) septate, 12-30 x 8-12//, minutely echinulate- 

 roughened, pale yellow-brown. 



Heterosporium Eucalypti E. & E. 



On dead leaves of Eucalyptus, California, Nov. 1893 (A. J. 

 McClatchie, No. 542). 



