THE FUNGI WHICH CAUSE PLANT DISEASE 515 



Pycnidia globose, without flat- 

 tened base but on a stellate 



superficial subicle 2. Couturea. 



Pycnidia without a subicle, 

 erumpent 



Pycnidia hairy 3. Wojnowicia. 



Pycnidia smooth 4. Hendersonia, p. 515. 



Pycnidia opening widely, with an 

 operculum 

 Pycnidia superficial, dark, hairy 5. Angiopoma. 

 Pycnidia immersed, pale, smooth 6. Lichenopsis. 

 Conidia appendaged 



Conidia 1-ciliate at each end 7. Cryptostictis, p. 516. 



Conidia 1-ciliate at base 8. Urohendersonia. 



Conidia with a round or cup-like 



appendage at each end 9. Santiella. 



Conidia united in groups 



Conidia united into a fascicle 10. Eriosporina. 



Conidia stellately imited 11. Prosthemium. 



Pycnidia beaked 12. Pseudographium. 



Pycnidia in a stroma 13. Hendersonula, p. 516. 



Hendersonia Berkley 



Pycnidia immersed, erumpent or not, 

 globose with a papillate ostiole or depressed, 

 membranous or subcarbonous; conidia elon- 

 gate or fusoid, 2 to many-septate. 



Some two hundred fifty species, chiefly 

 saprophytic, although there are several para- 

 sitic species. 



H. maU Thum. 



Epiphyllous; pycnidia disciform, large, 

 scattered, black, on brownish, orbicular, 

 violet-margined spots; conidia clavate, apex 

 rounded, base somewhat acute, not constricted, 12-14 x 4-5 ii 



On leaves of apple in Europe and America. 



H. piricola Sacc. is on pear; H. cydonse C. & E. on quince 



H. acicola M. & T. causes a pine leaf disease."^ 



H. coffese Del. is on coffee; 



Fio. 356. — Hender- 

 son i a , bymenium 

 and spores. After 

 Starback. 



