48 



Mycologia 



Adanson (Fam. 2: 10. 1763) based his genus Poria on Mich. 

 pi. 61. f. 2. 1729, a polynomial and as yet undetermined species, 

 citing A. porosum Brown in support of his use of the name. His 

 treatment was similar to that of Hill, since it included only pileate 

 forms. 



This historical use of Poria was followed until the time of 

 Persoon, who properly established the genus and included in it 

 resupinate species only, without reference to previous usage. 



Poria Pers. Neues Mag. Bot. 1 : 109. 1794 



Physisporus Chev. Fl. Par. 1 : 261. 1826. 



Hymenophore resupinate, epixylous, perennial, inseparable, 

 rigid; context thin, white; tubes white, becoming stratified after 

 a year or more ; spores hyaline. 



Type species, Poria medullapanis (Jacq.) Pers. 



This genus was founded upon three species, P. medullapanis, 

 P. salicina, and P. fimbriata, the last two of which are generically 

 distinct from the first. Physisporus was based on nine species, 

 the first accompanied by the citation of a figure being P. medul- 

 lapanis. 



Poria medullapanis (Jacq.) Pers. Neues Mag. 

 Bot. 1 : 109. 1794 



Boletus medullapanis Jacq. Misc. Austr. 141. pi. 11. 1778. 

 Polyporus pulchellus Schw. Trans. Amer. Phil. Soc. 4 : 158. 1832. 

 Polyporus dryinus Berk. & Cooke; Berk. & Curt., Grevillea 6: 

 130. 1878. 



Poria tomento-cincta Berk. & Rav. ; Cooke, Grevillea 15 : 26. 

 1886. 



Poria holoxantha Berk. & Cooke ; Cooke, Grevillea 15 ; 26. 1886. 



Jacquin gave a fairly good and complete description of the 

 plant, with a poor figure. It is no wonder that Fries could not 

 interpret this description, since he had probably never seen the 

 plant. I have seen only one specimen of it from Sweden. Per- 

 soon, on the other hand, had a considerable number of specimens 

 in his herbarium and it is to him that we must look for the true 

 idea of the species. 



