286 THE AGARICACEAE OF MICHIGAN 



disk, pallid tinged yellowish. GILLS long, decurreut, arcuate, 

 thiekish, rather broad toward stem, close to subdistant, golden-yel- 

 low to chrome-yellow, sometimes forked, very intervenose, some- 

 times reticulate-porose toward stem. STEM 4-8 oh. long, 5-10 mm. 

 thick, equal or ventricose, solid, pale, reddish yellow, yellow at base, 

 punctate with small, reddish-brown scales or dots. SPOKES 

 elongated-oblong, almost fusiform, 9-12 x 3-4.5 micr., yellowish in 

 mass. CYSTIDIA numerous on edge and sides of gills, clavate- 

 lanceolate, GO-70 x 9-15 micr., filled with yellowish content. ODOR 

 and TASTE mild. 



Gregarious or scattered. On the ground or among mosses in 

 frondose or conifer woods. Ann Arbor, Bay View. July-August. 

 Infrequent. 



This species appears to represent a link between the Boletaceae 

 and the Agaricaceae. The top of the pileus may easily be mistaken 

 for Boletus subtomentosus and in its extreme variation the gills 

 anastomose to such an extent as to almost appear porose near the 

 stem. The plant has been placed in Gomphidius, Flammula, and 

 Clitocybe, while Bresadola erected the genus Phylloporus for it, 

 where it might well be left. The plant was first described by Rev. 

 David de Schweinitz from specimens gathered in North Carolina. 

 It occurs also in Europe where it has had a variety of names. 



279. Paxillus involutus Fr. (Edible) 



Syst. Myc, 1821. 



Illustrations: Cooke, 111., PI. 875. 



Gillet, Champignons de France, No. 514. 



Berkeley, Outlines, PI. 12, Fig. 5. 



Michael, Fiihrer, f. Pilzfreunde, Vol. I, No. 30. 



Ricken, Blatterpilze, PI. 28, Fig. 2. 



Swanton, Fungi, PI. 40, Fig. 7-8. 



Atkinson, Mushrooms, Fig. 155, p. 16G, 1900. 



Hard, Mushrooms, Fig. 232, p. 287, 1908. 



Peck, N. Y. State Mus. Rep. 48, PI. 28, Fig. 18-23. 



PILEUS 4-9 cm. broad, convex then expanded-depressed, firm, 

 pliant in age, ochraceous-rusty -brown, reddish-brown or olive-brown, 

 somewhat cottony-torn entose, margin at first involute then spread- 

 ing and furrowed or ridged, sometimes subviscid, shining in spots 

 when dry. FLESH thick, yellowish-pallid, becoming brownish 



