JAN. 1896. FLORA OF W. VIRGINIA MILLSPAUGH & NUTTALL. 99 



D. rubellum microsporum Sacc. 



On dead limb Magnolia acuminata, Aug. 16, 1894, Short Creek, 

 alt. 1,000 ft. On Liriodendron Tulipifera (Nut fall, 1659). 



TUBERCULINA Sacc. 



T. persicina (Ditm.) Sacc. 



Parasitic on Uredo (Caeoma) nitens,t\iz.t on Rubus Baileyanus June 

 10, 1894 (Nuttall, 1557, 527). 



ILLOSPORIUM Mart 



I. caespitosum E. & E., Proc. Phila. Acad., 1894, 385. 



TYPE HABITAT: On rotten log, Nov. 15, 1893 (Nuttall, discov. 

 1286, 231). 



Sporodochia globose, 100 to no /;. diameter, cespitose, form- 

 ing tufts about i mm. diameter. Hyphae 6 to 8 n thick, branched, 

 the branches curved or tortuous. Couidia globose or ovate 6 to 

 12 ii. diameter. 



Differs from / coccinellum Cke. in its color, and larger cespitose 

 sporodochia. 



HYMENULA Fr. 



H. cerealis E. & E., Proc. Phila. Acad., 1894, 3^6. 



TYPE HABITAT: On wheat straw Triticum sp. brought in from 

 Painesville, Ohio, May 24, 1894 (Nuttall, discov. 1520, 495). 



Sporodochia gelatinous, orbicular, yellowish-amber color be- 

 coming darker, at first sub-pulvinate, becoming depressed or flat- 

 tened, .5 to. 75 mm. diameter. Basidia slender, 25 to 30 x 1.25 /x 

 simple or oftener branched. The branches erect. Conidia hya- 

 line, oblong, minute, 3 to 4 x i to 1.25 //. 



CYLINDROCOLLA, Bon. 



C. DENDROCTONI Peck, Flora, W. Va. , 1892, 516. 



TYPE HABITAT: On dead insects, Dendroctonus frbntalis, beneath 

 the bark of pine. Hampshire Co., near Romney, (MillspaugK). 



The insects are probably killed by this fungus, as they lie dead 

 in their burrows in the inner bark of the tree (Pinus Virginiand). 



Sporodochia minute, forming irregular masses, soft, somewhat 

 waxy, white or whitish; sporophores slender, abundantly branched 

 above, often compacted below into a short stem-like base, spores 

 catenulate, short cylindrical, subtruncate, colorless, .00016 to 

 .0002 in. long, .00008 to .0001 in. broad. 



On some of the insects there is a cottony or flocculent mass of 

 white mycelium interwoven in a somewhat reticulate manner, and 

 collected in strings or bundles. It bears no fruit but is probably 

 a luxuriant growth of the mycelium of this fungus. 



Occasionally the fungus seems to spread from the insect to 

 bark immediately adjacent to it. 



