fimbriata. This is Porothelium fimbriatum as now well known. 



frustulata A very poor specimen from Chaillet. I do not know it, but it 

 surely has no relation to salicinus as Persoon suggests. 



fugax The type is there, a piece of wood, and under a lens I think I can 

 see a faint indication of a fungus on it. If the species can not be recognized 

 from Persoon's Icones Pictae T. 16, f. 2, it will never be known in the sense of 

 Persoon. 



fusco-carnea Persoon only found this once, near Paris, on dead branches. 

 It is unknown to me, but the specimens are very poor. 



incarnata The type is in good condition. It is a thick slab about 6 mm. 

 thick, with long pores and thin subiculum. Persoon says white within and 

 Fries suggests it was a "lusus". It has no resemblance to Fries' Icones of 

 incarnata, but it may be his Poria placenta. 



incrustans This was Persoon's change of pbliqua of Fries. It is needless 

 to say that Fries never accepted it. There is only a small fragment from 

 Sweden. 



laurens The type from Chaillet is in the collection as figured (poorly) Myc. 

 Europ. T. XVII, fig. 2, not fig. 3, as cited by error. It is resupinate, Polyporus 

 amorphus. 



Medulla panis In the Persoonian sense this is quite evidently a frequent 

 species " assez vulgaire ", " sur des bois travailles ". There are seven collections 

 in his herbarium. It is a thick, white, firm species on the Trametes order, with 

 small, round, firm pores. Medulla panis was based on an old Jacquin picture 

 which each person interprets differently, and it is said that Persoon, Fries and 

 the Danish botanists each take a different plant under this name. 



megalopora Persoon named two collections, one from Mougeot, the other 

 from Desmazieres, not the same I think and neither normal. 



mollusca The type is in good condition and seems to me the same as 

 mucida. The type was not sent to Bresadola, but a specimen that Persoon had 

 marked "Poria spongiosa, Poria mollusca?" I think, notwithstanding, that 

 Poria mollusca will have to be taken in the sense of Bresadola, who gave the 

 first account of it that can be recognized. In the woods of Sweden I was never 

 able to tell mollusca from vulgaris without the microscope, for excepting the 

 spore characters they are much alike. I doubt if either Persoon or Fries, 

 neither of whom used the microscope on Poria spores, could tell the two apart. 



mucida This is a white species with large pores and a soft white border. 



1 do not know it with certainty, but I doubt if it is the plant now so called. 



NITIDA. Ce fut, je crois, le Rev. Bresadola qui observa tout d'abord les 

 caracteres microscopiques de cette espece, sous le nom d'eupora de Karsten. 

 (Karsten etait si occupe a chercher de nouvelles especes qu'il n'avait pas toujours 

 le temps d'en etudier les caracteres au microscope.) Cette espece presente une 

 tres curieuse cystidia, de grande taille, sur l'hymenium. Ce fut Bresadola qui me 

 fit connaitre cette plante et je reconnus 1'espece de Persoon des que je la vis. I/a 

 grande cystidia si abondante sur l'hymenium, facilement distinguee sous le 

 microscope confirma entieretnent cette opinion des le debut. Ce type de nitida 

 ne fut pas envoye a Bresadola et sa conclusion, tiree sans doute de 1'illustration 

 de Persoon, est erronee. J'indiquerai la genealogie de Poria nitida par le langage 

 symbolique habituellement employe, ainsi qu'il suit : Poria nitida Pers. Obs. Myc. 



2 p. 15 (non Fries, non Bresadola): Poria Blyttii Fries, Hym. Europe p. 571 p. p. 

 (non Bresadola) 5 : Poria eupora Karst. Not. Soc. Fenn IX p. 360. 



Racodioides see ferrea. 



radula I believe this to be the same as versipora. 

 salicina asnow well known. 



scalaris There is only one collection (ex Gay). I think it is the resupinate 

 form of Trametes serialis, the same as Fries called Poria callosa. 



5 On trouve dans 1'herbier de Fries deux plantes cliff ^rentes remises par Blytt et denom- 

 mees : Poria Blyttii. I^es deux prsentent ces cystidia particulieres. uiais cela n'est ft mon avis 

 qu'une coincidence. Bresadola les considere comme des varieles d'nne meme espece. Celle 

 qui pousse sur bois acrm est rare, je ne 1'ai jamais rencoiitr^e et Mr. Romell ne 1'a trouvee 

 qu'une seule fois; celle qui pousse sur les bois feuillus est beaucoup plus commune. C'est 

 manifestement cette derniere " avec bord pale " que Fries d&rit sous le nom de Poria Blyttii, 

 et c'est celle-ia aussi que Persoon appelle Poria nitida, tandis que Karsten la deiiomme : 

 Poria eupora. 



472 



