372 PROCEEDINGS OF THE ACADEMY OF [1894. 



Differs from G. pruaicolum E. & E. (J. M. III., p. 129) princi- 

 pally in the much larger conidia. 



Myxosporium seriatum E. «fe E. 



On maple bark, Nuttallburg, West Va., June, 1894 (L. W. Nut- 

 tall, No. 523). 



Nuclei pallid, orbicular, about 1 mm. diam., seated on the surface 

 of the inner bark ; surrounded by a thin layer of smoky colored 

 radiating hyphse from the inner extremities of which the botuliforra 

 or oblong, 6-8x2-2i'/., hyaline conidia are produced. The nuclei 

 are seriately arranged, and the pale flesh-colored, flattish cirrhi are 

 erumpent through narrow, longitudinal cracks in the bark. 



Myxosporium platanicclum E. & E. 



On dead limbs of Platanus, Nuttallburg, West Va., April, 1894 

 (L. W. Nuttall, 467). 



Acervuli subcutaneous, vesiculoid, pale, 1 mm. diam., raising 

 the ruptured epidermis into pustules but not erumpent. Sporules 

 oval or oblong-ovate, hyaline, nucleate at first, 10-12 x 5--6,", on 

 stout basidia. 



CoUetotrichum Ehexice E. & E. 



On leaves of Rhexia Virginica, Kimensi, Del., Aug. 25, 1894 

 (Commons, No. 2,534). 



Spots orbicular, small (1-2 mm.), dirty white with a reddish- 

 purple border. Acervuli mostly epiphyllous, sph^eriteform, erum- 

 pent, 250-350,'/ diam., surrounded or clothed with black bristle-like 

 hairs, 60-70x3-31,".. Sporules oblong, obtuse, binucleate, about 

 12x4,", and very short basidia. 



Cylindrosporium Crataegi E. & E. 



On leaves of CraUegus, Nuttallbui-g, West Va.. July, 1894 (L. 

 W. Nuttall, No. 571). 



Leaves more or less mottled with rusty red, at length uniformly 

 of this .same color. Acervuli innate, erumpent on both sides, and 

 whitening the surface of the leaf with abundantly discharged conidia, 

 which are 75-100 x 3-3j,", nearly straight, or more or less undulate 

 and curved, nucleate, and faintly 3-5-septate. 



Cylindrosporium ulmicolum E. & E. 



On leaves of Ulmus alata Starkville, Miss., Nov. 1893 (Prof S. 

 M. Tracy). 



