(419) 
42. GEOPETALUM Pat. Hymén. Eur. 127. 188%. 
Sporocarp fleshy, putrescent: pileus dimidiate, not at 
first resupinate: lamellae from a lateral point: spores white: 
veil none: stipe none or a lateral prolongation of the margin 
of the pileus. 
Type, Pleurotus petaloddes (Bull.). (Syll. 5: 361.) 
This probably intergrades to some extent with the next 
genus but the groups as a whole are sufficiently distinct. As 
here used it corresponds in a general way with Pleurotus 
§ Dimidiat?, of the Sylloge. 
43. CREPIDOTUS (Nees) S. F. Gray, Nat. Arr. Brit. Pl. 
1: 616, 1821. Not Crepzdotus (Fries) Quél. 1872. 
Sporocarp fleshy, putrescent: pileus irregular: lamellae 
long-decurrent: spores white or lilac tinted: veil none: stipe 
eccentric, stout, solid. 
Type, Pleurotus ostreatus (Jacq.). (Syll. 5: 355.) 
As here defined this includes Pleurotus subsections Clyto- 
cybarit and Hu-Pleurotus, of the Sylloge. This is an ex- 
ample of a most confusing shifting of names. Our genera- 
tion is not responsible for the error of completely ignoring 
the work of S. F. Gray. His work was in the main good 
and deserves recognition on other grounds besides priority. 
44. MICROMPHALE (Nees) S. F. Gray, Nat. Arr. Brit. 
Pl. 1: 622. 1821. 
Sporocarp fleshy, putrescent: pileus more or less irregular : 
lamellae sinuate or adnexed: spores white: veil none: 
stipe more or less eccentric, stout, solid. 
Type, Pleurotus fimbriatus (Bolt.). (Syll. 5: 344.) 
This is Plewrotus, subsection Tricholomatarii, of the Sy+ 
loge. Itis a sufficiently well-marked genus of which Plez- 
rotus ulmarius (Bull.) is the best known North American 
species. 
43. COPRINOPSIS Karst. Acta Soc. Faun. Fl. Fenn. 2: 
26. 1881. 
Ephemorocybe Fayod, Ann. Sci. Nat. Bot. VII. 9: 380 
