WEST X'IRGIXIA GEOLOGICAL SURVEY 'J^i 



reddish-yellow, soon confluent forming large, brown, dry, 

 dead spots of irregular shape and indefinite outline, occupy- 

 ing a large part of the leaf. Acervuli not numerous, scat- 

 tered, epiphyllous, prominent, resembling perithecia; conidia 

 oblong-elliptical, 12 to 16 x 6 to 7 ju,. 



Differs from G. Rubi E. & E. in its larger, fewer, black 

 acervuli and broader conidia, which also are about twice 

 as large as in G. Venetum Speg. 



MYXOSPORIUM Link. 

 M. LUTEM E. & E., Proc. Phila. Acad., 1893, 458. 



Type habitat : On bark Hicoria ovata, April to July. 



1893 {Nuttall, discov. 1015, 79). E. & E. N. A. F. 2953. 

 Fungi Columbian! 150. 



Stroma globose-conical, light yellow, .75 to i mm. diam- 

 eter, slightly sunk in the inner bark, unilocular and opening 

 by a single pore. The surface of the inner bark around 

 this pore is of a pale slate color, the colored portion definitely 

 limited by a black line so as to form an irregular circle 

 about 2 mm. across, but this line does not penetrate the bark. 

 Sporules navicular-oblong, hyaline, obtuse, 10 to 11 x 4 to 

 5 IX wdth I to 2 large nuclei. Basidia slender-cylindrical 15 

 to 20 X 1.5 |U. Mass of exuded sporules flesh color. 

 M. Rhois (B. & C.) Sacc. 



On fire killed Rhus Iiirta, June 20, 1895 (Nuttall, 157=;, 



.537)- 

 J\I. PLATANicoLUM E. & E., Proc Phila. Acad., 1894, 372. 



Type habitat: On limbs Platanns occidentalis, April 2|, 



1894 ( Nuttall, discov. 1485, 467). 



Acervuli subcutaneous, vesiculoid, pale, i mm. diameter, 

 raising the ruptured epidermis into pustules but not erump- 

 ent. Sporules oval or oblong-ovate, hyaline, nucleate at first, 

 10 to 12 X 5 to 6 /x, on stout basidia. 

 M. SERiATUM E. & E., Proc. Phila. Acad., 1894, 372. 



Type habitat : On bark of Acer sp., June, 1894 (Nuttall, 

 discov. 1552, 523). 



Nuclei pallid, orbicular, about i mm. diameter, seated 

 on the surface of the inner bark ; surrounded by a thin 

 layer of smoky colored radiating hyphae, from the inner 

 extremities of which the botuliform or oblong, 6 to 8 x 2 

 to 2.5 fi hyaline conidia are produced. The nuclei are seri- 

 ately arranged, and the pale flesh-colored, flattish cirrTii ar.:; 

 erumpent through narrow, longitudinal cracks in the bark. 



