In Leptonia most of the species are small, thin, and brittle, corresponding with Mycena in the white-spored series, and with Psathyra and Psathyrella in the dark-spored series.
Eccilia corresponds with Omphalia. Claudopus corresponds with Pleurotus in its habit of growth and lateral stem, differing in the color of the spores.
Annularia includes only a few small species having a ringed stem, no volva, and free pink gills. Cooke says of this subgenus that no British species are known.
The recorded species of Pluteus have their habitat on tree stumps, sawdust, or upon fallen timber. One species, Pluteus cervinus, is recorded as edible, but not specially commended. Of Entoloma, Worthington Smith says, "It is allied to Tricholoma, though most of the species are thinner and often brittle. It agrees also in structure with Hebeloma and Hypholoma." None of the species are recorded as having value as esculents.
The genus Bolbitius is described by Cooke as a small genus intermediate between Agaricus and Coprinus on the one side, and Coprinus and Cortinarius on the other. The species are small and ephemeral. Saccardo places Bolbitius in his division Melanosporæ, although the spores are ochraceous.
In the section Pratelli Psalliota and Hypholoma contain mushrooms which are of exceptionally fine flavor. In the first of these is found the common field mushroom Agaricus campester and its allies.
The black-spored section Coprinarii contains two genera which include a few recorded edible species, viz., Coprinus and Gomphidius. The Psathyrellas correspond in size to the Mycenas in the white-spored series and to the Psathyras in the purple-spored section; the gills are free or adnate and turn black when mature. None of the species are edible.
In Paneolus the plants are somewhat viscid when moist, the gills are described as "clouded, never becoming purple or brown." They are usually found on manure heaps near cities. None are edible.
Saccardo in his Sylloge combines the Pratellæ and Coprinarii, making of them one section which he calls Melanosporeæ.
G. Massee, the British mycologist, makes of the black-spored and the purple and purplish-brown spored series two divisions, calling them, respectively, Porphyrosporeæ and Melanosporeæ.