HELMINTHOSPOKIUM. 411 



Helminthosporium macilentum. Cooke. 



Broadly effused, black ; hyphae erect, septate, olive-brown ; 

 conidia fusoid or subolavate, 7-10-septato. terminal on the 

 hyphae and for a long time persistent, 50-65 X 10 /x. 



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

 Sacc, Syll., iv. n. 2002. 



On rotten wood. 



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 apiculus often falling away, 3-7-septate, 

 21-26 X 14-15 fi.. 



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

 508, t. 5, f. 6; Sacc, Syll., iv. n. 2005. 



HelminthosporiTim velatum. Corda. 



Mycelium effused, black, subtomentose ; hyphae 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. 



Selminthosporium 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 and pale, 1-2-septate, then elongating 

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

 50-100 n long. 



Helminthosporium rhabdiferum, B. & Br., Ann. Nat. Hist., 

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



On ripe peaches. 



Helminthosporium rhopaloides. Fres. 

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

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



