102 Pleurotus. 



B. DIMIDIATI. P. definitely lateral, without a free 

 margin behind ; not resupinate at first. 



[geoginus, D. C. P. erect, subinfundib. even, glabrous, edge 

 wavy, reflexed, brownish ; g. decur. crowded, white ; s. very short, 

 thick, tuberous. 



petaloides, Bull. P. 25 cm. thin, ascending, spathulate, entire, 

 disc depr. brownish then pale ; g. crowded, narrow, whitish ; s. short, 

 compressed, downy ; sp. 9 10 x 4. 



P. porrigens differs in being white and stemless. 



[semiinfundibulifonnis, Karst. Erect, simple, semiinfundib. 

 even, glabrous, rusty tan, edge wavy, reflexed ; g. deeply decur. 

 crowded, whitish then yellowish ; s. exactly lateral, pallid ; sp. 4 6, 

 subgl. 



pulmonarius, Fr. P. 45 cm. obovate or reniform, rather con- 

 vex, glabrous, greyish or tan ; g. plano-decur. simple, albo-livid ; s. 

 round, very short, downy ; sp. - . 



Differs from P. serotinvs in very short s., and glabrous p. 



var. juglandis, Fr. Gregarious ; g. greyish brown. 



[pulmonariellus, Karst. P. convex, reniform, rather strigose, 

 even, yellowish, intermediate stratum thick, gelatinous ; g. plauo- 

 decur. crowded, white then yellowish ; s. very short. 



[almeni, Fr. P. thin, reniform, glabrous, brownish tawny, nar- 

 rowed behind into a very short stem ; g. determinately decur. diver- 

 gent, paler than pileus ; sp. 7 9 x 34. 



serotinus, Schrad. P. 3 7 cm. fleshy, compact, viscid, reniform 

 or obovate, yellowish-green, or sooty-olive ; g. crowded, yellow then 

 pallid ; s. 2 cm. with blackish squamules ; sp. . 



mitis, Pers. P. 1 2 cm. tough, reniform, dry, rufescent then 

 whitish ; g. crowded, distinct, white ; s. 1 cm. compressed, dilated 

 upwards, whitish-squamulose ; sp. 4 x 2. 



gadinoides, W. G. Sm. White. P. 11'S cm. horizontal, shell- 

 shaped, hygr. floccose, dry ; g. crowded, branched ; s. minute or 

 absent ; sp. 7 x 3. 



limpidus, Fr. White. P. 1 2 cm. obovate or reniform, even, 

 glabrous, hygr., narrowed behind to point of attachment ; g. white, 

 decur. to base ; sp. - . 



Differs from P. mitis in being shining white and subsessile. 



[limpidoides, Karst. P. obpvoid or reniform, often lobed, soft, 

 even, velvety, dark grey then livid ; g. decur. whitish ; upper stratum 

 of flesh gelatinous ; sp. 6 9 x 3 4. 



[subrufulus, Karst. P. soft, subgelatinous, orbicular or reniform, 

 even, glabrous, rufous- or pinkish-white ; g. crowded, white ; s. lateral, 

 strigose, very short. 



[planus, Fr. Minute, subsessile, violet then flesh-colour. 



reniformis, Fr. P. 1 2 cm. horizontal, reniform, grey, disc depr. 

 plane ; g. spreading from tubercular stem-like base, divergent, grey ; 

 sp. . 



