52 



Mycologia 



In the collection at Albany, Peck marked a specimen var. mar- 

 ginatum. It has a light-yellow margin, but otherwise agrees with 

 the type. 



This species is exceedingly variable in color and in size of 

 spores, although the shape of the spores is rather uniform. The 

 species is, no doubt, cosmopolitan. 



Doubtful Species 



1. Rhinotrichum herbicolum Ellis and Dearness, Proc. Cana- 

 dian Inst, i : 90. 1897. " Effused, light yellow, becoming brown 

 in the centre. Hyphae, coarse, septate, branched, nearly hyaline, 

 8-10 fx thick. Fertile hyphae, sub-undulate above, tips swollen and 

 bearing the globose, sub-hyaline, finely echinulate, 7-9 /x conidia. 



" On dead stems of Solidago canadensis, London, Can., Aug., 



1895." 



The species is said to differ from R. Curtisii in its coarser 

 hyphae and in its smaller echinulate conidia. The specimen in the 

 Ellis collection in the New York Botanical Garden, which is prob- 

 ably a part of the type collection, shows the spores clustered at 

 the apex of the fertile branches. Better material is necessary 

 before its proper place can be determined. It resembles in many 

 respects Botrytis fulva Link. 



2. Rhinotrichum helium Berk. & Curt. Grevillea 3 : 108. 1875. 

 " Vivide aurantiacum, effusum ; sporis oblongo-ellipticis. 



" Dead wood, Ala. Beaumont 4865." 



No specimen of this species was examined by me and so far 

 as known it has not been found since its first discovery. 



3. Rhinotrichum pulverace x um Ellis ; Kellerman, Jour. Myc. 

 1 : 47. 1885. " Forming a thin pale, yellowish white, subgranu- 

 lose layer on the matrix ; hyphae much branched, the ends swollen 

 and smooth; the conidia (appearing at first inside these swollen 

 ends and pushing out through the investing membrane?) variable 

 in size and shape, globose, 5-9 /a in diameter or elliptical, 5-12 X 

 5-7 fi. The elliptical conidia mostly with a slight apiculus at one 

 end. The branching hyphae are sparingly septate and mostly not 

 over 3 /x in diameter. 



" Peculiar in the smooth swollen tips. The sterile hyphae form 



