432 



RESEARCHES ON FUNGI 



to even a single host ; while other parasites, e.g. Fomes pinicola, 

 Pohfporns squamosus, Peronospora parasitica, and Cyslopus 

 candidus, are far less specialised and are found on many different 

 hosts. Omphalia flavida is an extreme example of a non-specialised 

 parasite ; for, in addition to Coffee, its chief host, it attacks plants 

 belonging to the most diverse families of Flowering Plants and also 

 various Ferns. It is probable that there are but few parasites which 

 can attack Ferns as well as Flowering Plants. i The following list 

 includes the host-families of Omphalia flavida and the observers by 

 whom they have been recorded. 



DiCOTYLEDONES 



Anacardiaceae {Mango) 



Apocynaceae 



Begoniaceae 

 Compositae 



Crassulaceae 

 Leguminosae 



{Nerium Oleander) 

 I {Tabernaemontana) 

 [Begonia) 

 {unidentifled spp.) 



{Bryophyllurn) 



[{Bryophyllurn pinnatum) 

 { {Inga vera — Guava) 

 {{Andira inermis — 31 oca) 



Fawcett.2 



Buller and Vanterpool.^ 

 Puttemans.* 

 Fawcett. 



Maublanc and Rangel.^ 

 (McClelland.6 

 [ Buller and Vanterpool. 

 Miiller.7 

 Fawcett. 

 McClelland. 



1 The species of the Rust genera Hyalopsora, Milesia, and Uredinopsis have 

 their aecidial stage on a Conifer (Abies) and their uredospore and teleutospore stages 

 on Ferns (Blechnum, Scolopendrium, Polypodium, etc.). 



2 G. L. Fawcett, loc. cit., p. 13. 



3 A. H. R. Buller and T. C. Vanterpool, loc. cit. 



4 A. Puttemans, " O Stilbella flavida parasita sobre Tabernaemontana," Revista da 

 Sociedade scientifica de Sao Paulo, 1907, p. 95. Cited from Maublanc and Rangel. 



5 A. Maublanc et E. Rangel, loc. cit., pp. 41, 43. 



6 T. B. McClelland, " The Coffee Leaf Spot (Stilbella flavida) in Porto Rico," 

 Porto Rico Agric. Exp. Station, Bull. No. 28, 1921, p. 7. McClelland, in a badly 

 affected, almost abandoned plantation in Porto Rico found the following plants 

 acting as hosts for Omphalia flavida : achiotilla, bilsamo, bejuco de mona, bejuco 

 de paloma, berugillo, bruja, cadillos, camasey bianco, camasey cimarron, china, 

 helecho, guasabara, guayaro, guava, higiierillo, lechecillo, lengua de vaca, nioca, 

 nuez moscada cimarrona, palo de cucubano, palo de hueso, tostado, vinagrera, 

 yerba hedionda. Owing to uncertainty as to the scientific equivalents of these 

 local names, I have not added them to my list. 



7 A. S. Miiller, at Mayaguez, Porto Rico, in litt., 1928. 



