THE FUNGI WHICH CAUSE PLANT DISEASE 533 



Leptostromella Saccardo (p. 532) 



Pycnidia at first covered, at maturity apparently superficial, 

 depressed convex, subcarbonous, dark colored; conidia bacillar 

 or filiform, continuous or sep- 

 tate. 



About twenty species, chiefly 

 of no economic importance. 



L. elasticae E. & E. 



Spots large, more or less el- 

 liptic, whitish, sordid, purplish 



margined; pycnidia epiphyllous, fiq. 364.— LeptostromeiTa eiastictB. 

 hysterioid, 0.5-0.7 mm.; longi- After Stone and Smith, 



tudinally dehiscent; conidia oblong, hyaline, continuous, 12-15 x 

 4-5 n; conidiophores 12-15 x 3-4 jn; obtuse, subolivaceous. 



The cause of leaf spots of Ficus elastica.^'* 



Ezcipulaceae (p. 479) 



Pycnidia membranous to carbonous, black, cup-shaped, patel- 

 late or hysterioid, at first more or less spherical but at length widely 

 open, erumpent or superficial, glabrous or hairy. 



Key to Sections of Excipulaces 



Conidia globose to fusoid, continuous 



Hyaline I. Hyalosporse, p. 533. 



Colored II. Phseosporae. 



Conidia 1-septate, hyaline III. Hyalodidymae, p. 536. 



Conidia 2 to several-septate 



Hyaline IV. HyalophragmiaB. 



Colored V". Phseophragmise. 



Conidia filiform or bacillar VI. Scolecosporae, p. 536. 



Excipulacex-Hyalospors 



Conidia hyaline, continuous, globose to oblong. 



