HYPHOMYCETACEAE 441 



p. 1003. Conidiophores erect, curved, caespitose, septate, 

 50-70X3-4*5 p ; conidia brown, obovate-oblong, many- 

 septate,, muriform below, septate above, apiculus hyaline, 

 length including apiculus 100-140 X 15-18 p. 



Mystrosporium, Corda. Conidiophores simple or spar- 

 ingly branched, rather short, rigid, typically brown conidia 

 elliptical, oblong, or subglobose, many-septate, muriform, 

 dark brown, acrogenous, solitary or rarely subsolitary. 



Mystrosporium adustum, Massee. Forming black 

 patches on bulbs of Iris reticulata ; hyphae forming a 

 crust, dark brown, 5-8 p thick, certain cells often inflated ; 

 conidia elliptic-oblong or ovate, ends obtuse, with 5-7 

 transverse septa, becoming muriform, septa often oblique, 

 sometimes with transverse septa only, 45-60X20-22 //,, 

 smooth, dark brown, translucent, terminal or at the tips 

 of short branches, solitary. 



Mystrosporium alliorum. Berk., Sacc., Syll., iv., No. 2592. 

 Conidiophores brown, septate, often flexuous ; conidia 

 terminal or on short lateral branches, elliptic-oblong or 

 subpiriform, constricted in the middle, becoming multi- 

 septate and muriform, septa sometimes oblique, epispore 

 brown, minutely but distinctly warted, 30-45x8-12 /u,. 



Described from Berkeley's type, which has been dis- 

 covered in the Kew Herbarium. 



Stilbum, Tode. Stroma terete; apex capitate, bearing 

 the conidia on the tips of the component hyphae ; conidia 

 minute, continuous, at first involved in mucus. 



Stilbum nanum, Massee, Kew Bull^ 1898, p. 112, figs. 

 11-13. Conidiophore very minute, scarcely 0^5 mm. high, 

 gregarious, pale yellow ; stem equal, thin ; capitulum 



