SPORES HYALINE. 



and Trametes, and there are few sections in Saccardo that are not enriched by one 

 or more of them. 



ILLUSTRATIONS. No colored figure published. Sowerby, t. 195, here referred is more 

 probably Fomes conchatus. 



SPECIMENS. United States and Canada, over a hundred collections. We have also the 

 followmg from foreign countries: Spain, Rev. L. Navas (1); Samoa (2); Ceylon (4); Mexico (!) 

 Japan (2); Mauritius (3); Madagascar (4) ; Congo Beige (2) ; South Africa (6); India (2)- Australia 

 (1); Argentine (1); Brazil (9). 



Compare Balansae, breviporus, caesiellus, endozonus, fucatus, holosclerus, homalopilus ina- 

 moenus, Lawrencn, omalopilus, pertusa, purpureofuscus, rubiginosus, silaceus, subgilvus sublilacinus 

 also Fomes bambusinus. 



Forms. 



Polyporus gilvus is so common and so constant in the United States that we 

 hardly notice any variations in it. It changes some in color with age, but no one 

 would hardly venture a variety, much less a species, on the slight difference. In the 

 tropics it does depart into some pronounced forms, but most of the foreign collec- 

 tions could not be told on comparison from the "type" form. All the "forms" have 

 the same "structure" spores, setae, context color, etc., but differ slightly in external 

 features. The following nine species are in reality but forms of Polyporus gilvus. 

 The last four forms are thin and could be referred to Polvstictus. 



Fig. 682. 



Polyporus scruposus. 



POLYPORUS SCRUPOSUS (Fig. 682). Perfectly smooth forms of Polyporus 

 gilvus rarely occur, but the form that is called Polyporus scruposus is excessively 

 rough, with little tubercules and granules. It was named from the United States, 

 but these rough forms are more common and strongly marked in Africa than in the 

 States. As it grades into the type form in all degrees, it is difficult to maintain 

 even as a form. Fries named it, but the only type found is at Kew. 



SPECIMENS. South Africa, A. J. T. Janse (typically "scrupose"), Dr. O. Pazschke; India, 

 G. H. Cave; West Australia, Dr. F. Stoward (strongly "scrupose"); New Caledonia, Museum Paris. 



Compare crocatus, isidioides, trachodes. 



POLYPORUS CARNEO-FULVUS. The surface color of Polyporus gilvus 

 is usually brown. In warm countries a form occurs with a reddish brown surface, 

 named as above. It hardly merits a distinct name. 



SPECIMENS. Samoa, abundant. It was the usual form in Samoa. 

 Compare cupreus. 



347 



