HELMINTHOSPORIUM. 411 



Helminthosporium macilentum. Cooke. 



Broadly ettused, black ; hj^pliae erect, septate, olive-brown ; 

 conidia fusoid or subclavate, 7-10-septate, terminal on the 

 hyphae and for a long time persistent, 50-05 x 10 /x. 



HelmintJiosporiiim macilentum, Cooke, Grev., t. 97, f. 18 ; 

 Sacc, Syll., iv. n. 2002. 



On rotten Avood. 



Helminthosporium turbinatum. B. & Br. 



Tufts thin, effused, velvety, brown ; hyphae slender, 

 simple, straight, obscurely septate, pale brown ; conidia 

 broadly turbinate, dark brown, subtruncate and apiculate 

 at the apex, the aj^iculus often falling away, 3-7-septate, 

 21-26 X 14-15 fx. 



Helmintlwsporium turbinatum, B. & Br., Ann. Nat. Hist., n. 

 508, t. 5, f. G ; Sacc, Syll., iv. n. 2005. 



Helm-inthosporium. velatum. Corda. 



Mycelium effused, black, subtomentose ; h^^phae simple, 

 short, thick somewhat nodulose, septate and opaque below, 

 apex thickened, continuous, semipellucid, furnished with a 

 white, diaphanous veil, blackish-brown ; conidia oblong, 

 5-6-septate, laterally adnate then deciduous, 36-37 /x long, 

 yellowish brown, pellucid. 



HelmintTiosporium velatum, Corda, Icon. Fung., i. p. 13, t. 

 Ill, f. 183 ; Sacc, SylL, iv. n. 2006. 



On rotten wood. 



Helminthosporium. rhabdiferum. B. & Br. 



Forming variously sized and rounded, intensely black 

 patches, sparingly branched, septate, very short ; conidia 

 straight, at first oblong aud pale, 1-2-septate, then elongating 

 and becoming sublinear, 7-11 -septate, deep brown, torulose, 

 50-100 /A long. 



Helmintliosporium rliahdiferum, B. & Br., Ann. Nat. Hist., 

 n. 1053, (1865) ; Sacc, SylL, iv. n. 2010. 



On rij)e peaches. 



Helminthosporium rhopaloides. Fres. 

 Effused, velvety, blackish-olive ; hyphae terete, 150 X 9 /x, 

 straight, septate, smoky-brown ; conidia cylindric-clavate. 



