g Dansk Botanisk Arkiv, Bd. 2. Nr. 11. 



|3. NUDÆ. 



3. P. erebia Fr. 



Spores 10—13 x 5—6 ja, ellipsoid. Basidia 2-spored, about 7 u 

 broad. Cystidia cvlindric-elubshaped, about 10— 12 u broad (1909). 



Fig. specimens: Trolleborg, wood of Fagus, gregarious on 

 moist ground. Not rare. 



Fries (loc. cit.) figures this species sub nom. Armillaria deni- 

 grata. Ricken (Die Blätterpilze) besides P. erebia (in the supple- 

 mentary notes pag. 460) describes a plant which he calls P. om- 

 brophila Fr. But the two descriptions are almost identical. Fries' 

 figure of P. ombrophila var. brunneola is not unlike a pale P. 

 erebia; but according to his descriptions it belongs to Eudermini, 

 close to P. togularis. However as he also - erroneously — 

 places P. erebia in Eudermini, it is not improbable that his 

 figure represents a form of P. erebia. 



4. P. dura Quélet ((Bolt.) Fr.?) 



Spores 12—13 x 7V 2 u, ovate-ellipsoid. Edge of gills rather sparsely 

 set with broad, obtuse, cylindric-sackshaped, 14—16 u broad 

 cystidia. 



Fig. specimens: Hjallese, border of road, in grass, July 1897. 

 Rather common on roadsides and in cultivated fields. 



Not clearly distinguished by several authors from P. prcecox. 

 It differs from P. p. macroscopically by its cream-white, rather 

 fleshy and absolutely non-hygrophanous cap (while in P. p. 

 the cap is more or less argillaceous or horn-brownish and 

 subhygrophanous) and microscopically by the larger spores etc. 

 — Schroeter (loc. cit.) describes it very well sub nom. P. can- 

 dicans (Schaeff.); but the dimensions of the spores which he 

 gives are rather those of P. prcecox. Fries (Hym. Europæi) 

 describes it as having a »fulvous« or »alutaceo-fuscescent« cap. 

 And probably what he calls P. dura is really but an open-air 

 form of P. praecox. — I follow Quélet, Ricken and others in 

 attaching the name P. dura to the white species. 



4 a. P. dura var. (P. vermiflua Peck) 

 Spores as in type. Cystidia ovate or balloon-shaped, about 18 u 

 broad. 



Fig. specimens: Hunderup, on naked ground amongst garden- 

 shrubs, July 1915. 



A large and strongly areolate-rimose form very much like 

 the one (var. xanthophijlla) figured by Bresadola (loc. cit. fig. 159), 

 but the gills are not yellowish. 



5. P. praecox (Pers.) 



Spores 9—10 x 5—5 Vi M» ovate-ellipsoid. Cystidia rather sparse 

 (on edge and faces of gill), up to 20 u broad, inflated flask- 

 shaped, obtuse. 



