THE FUNGI WHICH CAUSE PLANT DISEASE 547 



M. longisporum Edg.'^* 



Acervuli erumpent, subcorticular, variable in size up to 1.5 mm., 

 scattered over the host in poorly defined rows; conidia straight 

 or curved, 30-48 x 12-15 n, oozing out in white cirri; conidio- 

 phores very short. 



On twigs of Liriodendron. 



Other parasitic species are: 



M. piri Fcl. on pear; M. mali Bres. on apple; M. abietinum 

 Rost. on conifers; M. devastans Rost. on beech; M. lanceola S. & 

 R. on oak; M. cameum Lib. on beech twigs. 



Nffimaspora Persoon (p. 538) 



I 



Acervuli subgelatinous, indefinite, bright colored; conidia 

 allantoid, short, with a bristle at each end. 



N. crocea (Bon.) Sacc. is reported by Massee as the cause of 

 die-back of peach shoots in England.*** 



Hypodermium Link (p. 538) 



Acervuli subcuticular, erumpent, elongate, black; conidia ovate- 

 oblong, catenulate. 

 H. orchidearum Cke. is on Cymbidium. 



Colletotrichum Corda (p. 538) 



Acervuli innate erumpent, discoid or elongate, dark, surrounded 

 with long black setae; conidia terete to fusoid; conidiophores short. 



The genus is distinguished from Gloeosporium by the presence 

 of setae, a somewhat imreliable character. See p. 539. 



In part=Glomerella and Pseudopeziza. See pp. 264, 147. 



Some eighty species, several of them very important plant path- 

 ogens. 



C. goss3rpii Sout. on cotton =Glomerella gossypii. See p. 271. 



C. cincta Ston. on orchids=Glomerella cincta. See p. 269. 



C. rubicolum E. & E. on red raspberry=Glomerella rubicolor. 

 See p. 270. 



C. lindemuthianum (Sacc. & Magnus) Briosi & Cavara.^^' *^ 



164-167 



