370 FUNGUS-FLORA. 



*** Gills decurrent ; stem almost vertical. 



Pleurotus pantoleucus. Fr. 



Entirely white. Pileus 2-3 in. across, excentric, spathuli- 

 form or somewhat elliptical, even, glabrous, marginate and 

 depressed behind, margin even, entire ; flesh thick behind, 

 thin at the margin, white; gills decurrent; 3 lines broad, 

 crowded, not forked nor anastomosing behind ; stem not 1 in. 

 long, 3-4 lines thick, ascending, glabrous, solid, not rooting ; 

 spores elliptic fusiform, smooth, 11-12 X 4 /x, 



Agaricus (Plevrntus) pantoleucus, Fries, Hym. Eur., p. 172; 

 Cke., Hdbk., p. 104; Cke., Illustr., pi. 179 and 275a. 



On trunks. 



Solitary, firm, white, stem solid, ascending, very excentric, 

 1 in. or a little more in length, ^ in* or more thick, equal or 

 narrowed downwards, even, glabrous; pileus fleshy, ascending, 

 obliquely horizontal, spathulate and slightly convex, up to 

 3 in. long, and 2 in. broad, even, glabrous, disc often opaque, 

 margin quite entire. Gills decurrent, rather crowded, white. 

 (Eries.) 



Owing to the slightly pronounced characters, this species 

 was at one time considered as a sub-species of P. spodoleucus, 

 but the constant white colour, short, ascending stem, 

 thinner towards the base, and somewhat lateral pileus, de- 

 pressed behiiid, distinguish it. In one of Cooke's figures 

 (pi. 179), the pileus is of a pale warm ochraceous colour, the 

 gills also are pallid. There is a suggestion of these tints in 

 the fig. by Fries, Icones, pi. 88, f. 2. 



Pleurotus sapidus. Kalclibr. 



Caespitose, or several pilei appearing to spring from a 

 common branced stem ; pileus 1-3 in. across, flesh thick, ex- 

 centric, irregular, convex or obtusely gibbous then depressed, 

 glabrous, white or brownish ; stem stput, solid, several 

 usually springing from a thickened knob, whitish, 1-2 in. 

 long, expanding upwards into the pileus; gills decur- 

 rent, rather distant, narrow,- whitish; spores elliptical, 

 10-11 X 4-5 /x,. 



Pleurotus sapidus, Kalchbrenner, Hym. Hung., t. 8, f. 1 • 

 Cke., Hdbk., p. 371 ; Cke., Illustr., pi. 964. 



On elm trunks. 



