120 THE POLYPOBACEAE OF WISCONSIN. 



This species, wliich is reported by Bundy under the .name Boletus 

 lateralis, does not seem to be very common. A few specimens were col- 

 lected by B. 0. Dodge at Algoma, and a few were found at Bangor in 

 September, '05. 



The species grows in low damp ground. The Bangor specimens were 

 found in a marsh growing under willows. The largest specimen meas- 

 ured 8 cm. in diameter ; the stipe 3 cm. long and 1 cm. thick. In color 

 they were of a dull yellowish brown, only slightly viscid. 



The species may be easily recognized by the distinctly lateral stipe 

 and by the prominently radiating lamellae from which the pores are 

 formed. This feature seems to be the most prominent in B. porosus 

 and B. paluster Pk. 



Boletinus paluster Peck. (Plate XV, fig. 55.) 



Pileus thin, broadly convex, plane or slightly depressed, sometimes 

 with a small umbo, floccoso-tomentose, bright-red; tubes very large, 

 slightly decurrent, yellow, becoming ochraceous or dingy ochraceous; 

 stem slender, solid, subglabrous, red, yellowish at the top ; spores pink- 

 ish-brown, 7.6 to 8.9 microns long, 4 broad. 



Pileus 2.5 to 5 cm. broad ; stem 2.5 to 5 cm. long, 4.2 to 6 mm. thick. 



Peck (21, 2, 8, p. 78) says further of this plant: "This is a small 

 but pretty fungus which inhabits cold, mossy swamps and is somewhat 

 gregarious in its mode of growth. Sometimes it grows on decaying 

 moss-covered sticks or prostrate trunks. The color of the spores is pe- 

 culiar, being dull purplish or pinkish-brown, quite unlike that of any 

 other species. The mouths of the tubes are large for the size of the 

 plant, and the radiating lamellae are plainly visible. The umbo is 

 not always present. The red color of the pileus is apt to fade with age 

 or to become tinged with yellow." 



Not common. A few specimens were collected by B. 0. Dodge near 

 Algoma. The largest specimen is about 5 cm. in diameter. The stipe 

 is about 3 cm. long by 5 mm. thick. The blood-red color of the pileu» 

 has persisted through the drjdng, but has perhaps darkened somewhat. 



The growing plant may, at a distance, be mistaken for some red- 

 capped Russula. 



The species is easily distinguished by its bright red cap and the prom- 

 inently radiating lamellae. 



