(432) 
86. MONODELPHUS gen. nov. 
Putrescent, cespitose: pileus fleshy with thin margin, at 
first umbonate: lamellae unequally decurrent, not waxy: 
spores white: veil none: stipe central or nearly so, usually 
fibrous, no cortex. 
Type, Agaricus illudens Schw. Schr. Nat. Ges. Leipzig 
1: 81. 1822. (Syli. 5: 162, as Clitocybe tlludens.) 
This is taken to equal Chtocybe § Difformes, of the Sylloge. 
It is a well-marked genus closely related to Crepidotus 5S. F. 
Gray and Lent:mellus Karst., but having little in common 
with the groups with which it has usually been associated. 
87. OMPHALIUS Roussel, Fl. Calvados ed. 2. 66. 1806. 
Putrescent, solitary or gregarious: pileus thin, infundibu- 
liform: lamellae long-decurrent: spores white: veil none: 
stipe central, fleshy or fibrous, no cortex. 
Type, Clitocybe cyathiformis (Fries). (Syll. 5: 176.) 
This includes Clitocybe § Infundtbuliformes and § Cya- 
thiformes, of the Sylloge. It is comparable with Pocllaria, 
but the texture is softer and there is less vestiture. It is not 
to be confounded with Omphalza (Fries) Quél. 1872. The 
name is perhaps too nearly the same as Omphalea L. 
88. CLITOCYBE (Fries) Quél. Champ. Jura Vosg. 48. 
1872. 
Putrescent, solitary or gregarious: pileus fleshy. usually 
convex: lamellae adnate or short-decurrent: spores white, 
elliptical, smooth: veil none: stipe central, fleshy, no cortex. 
Type, C. nebularis (Batsch) Quél. (Syll. 5: 142.) 
This is Cletocybe § Disciformes, of the Sylloge. It differs 
from Omphalius in the thick, fleshy, usually convex pileus 
and in the short-decurrent gills. Some species of sections 
Orbiformes and Versiformes are also included here. . 
89. LACCARIA Berk. & Br. Ann. Nat. Hist. 370. 1883. 
Putrescent, solitary or gregarious: pileus thin, fleshy, con- 
vex or depressed, hygrophanous, often somewhat irregular: 
lamellae short-decurrent, thick, conspicuously whitened by 
