No. 18, V. d. Lek, Persoon's types of Polyporus (1913.] 11 
In Lroyp’s opinion what Persoon called „trigueter var. alneus” is 
the plant now known as radiatus but the present material does not 
permit the question being decided. 
Polyporus Rheades. 
Under this name we find in box 4 two good specimens; one of 
them is figured by Lroyp (Myc. Note 55 lig. 333). Further in cover 
(sub. N°. 910, 263—4S9) another specimen. (Fwo fragments on the 
same sheet do not belong to this species; they are small pieces of 
Fomes conchatus.) These specimens are some of the most interesting 
in the collection, for it appears from them that it is not the 
case that: Pol Rheades Pers. — Pol. Rheades FR. as SACCARDO U) 
mentions, according to Fries ?), but that Pol. Rheades Pers. — Pol. 
vulpinus FRr., (teste Lroyvp). Fries did not give the right interpre- 
tation of Polyporus Rheades Pers. and described Polyporus vulpinus 
as a new species. ®) According to Lrovyp it is a rare plant in Europe 
and occurs usually on poplar. *) 
Polyporus rutilans. 
Under this name are some specimens in cover (sub N°. 910, 
263—108), labelled by Persoon „Boletus rutilans Syn. fung.” Also 
we find good specimens in box 145, labelled however by PERSOON 
„Bol. rufus Syn. fung.” But here we undoubtedly have to do with 
a transposition of the label, for Boletus rufus (Syn. fung p. 504) is 
a real Boletus, well known to PeRSOON and with no resemblance 
to the present species. 
Polyporus sulphureus see Pol. citrinus. 
Polyporus tuberaster. 
In cover (sub. N°. 910, 263—136) a specimen in good condition, 
labelled by PERSOON: „Boletus tuberaster Pers.” 
1 Sylloge Fungorum vol. VL. p. 130. 
2) Hym. Eur. Ed. Alt. p. 551. 
3) Vet. Ak. Förh. 1852. p. 130. 
4) „Ad Populos, Padum variasque arbores, Upsaliae frequens.” Fries Hym. 
Eur. Ed. Alt. p. 565 (Pol. vulpinus.) 
(Published 2 May 1913). 
