222 



Mycologia 



nomena at all, since some prominent botanists have recently 

 adopted the rather peculiar notion that lichens are simply fungi. 

 The word lichen, however, has been used for a long time to mean 

 the composite structure that results from the symbiosis of lichen- 

 fungi with algae, and no very good reason has yet been given for 

 changing its meaning. A lichen-fungus is a fungus ; it is not a 

 lichen. There is no more reason for calling a lichen a fungus 

 than there is for calling a mycorhiza a fungus ; and it is just as 

 absurd to call a lichen-fungus a lichen as it would be to call a 

 mushroom a mycorhiza." 



Bahama Fungi 

 Mr. L. J. K. Brace has been sending in a number of fungi of 

 late, collected by him in the Bahamas. Most of the more con- 

 spicuous species in his collections are quite widely distributed in 

 tropical America, but the following are worthy of note, espe- 

 cially because very little mycological work has been done in these 

 islands : 



Hypochmis spongiosns, Septohasidium cirratum, Stereum candidum, Meru- 

 liiis cormm, Coriolus ahietinus, Coriolus sericeohirsutus, Fulvifomes depen- 

 dens, Fulvifomes Swieteniae, Ganoderma pulverulentum, Inonotus fruticum, 

 Inonotus porrectus, Trametes subnmrina, Tyromyces palustris, Chlorophyllum 

 molyhdites, Gymnopilus tenuis, Resupinatus suhharhattilus, Stropharia ftoccosa, 

 Cyathus pallidus, and Diplocystis Wrightii. 



Polyporus Bracei sp. nov. 



Pileus flabelliform to circular, depressed, thin, usually cespi- 

 tose, 8-15 cm. broad, larger by confluence; surface covered with 

 fine tomentum scarcely visible to the unaided eye, somewhat un- 

 even, azonate, uniformly dirty-white to pale-isabelline-avella- 

 neous, margin thin, often undulate or lobed; context soft and 

 punky, but fragile, homogeneous, pale-yellowish, 1-5 mm. or 

 more thick; tubes decurrent, dirty-white, turning darker when 

 bruised, scarcely i mm. long, mouths very minute, irregular, 

 variable, 4-6 to a mm. ; spores ellipsoid, smooth, hyaline, minute ; 

 stipe normally central, short, enlarged at the base, colored and 

 clothed like the pileus where not covered with whitish mycelium, 

 reaching 3 cm. long and 2 cm. thick, sometimes reduced to a 

 mere tubercle. 



Type collected in New Providence, Bahamas, in the autumn 

 of 1918, by L. J. K. Brace. 



