LEUCOSPORI. 69 



Series A. Pileus fleshy, not changing colour, or (only) turning pale, but Clitocybe. 

 not hygrophanous. Flesh firm, not watery, and not scissile into plates. Those 

 which turn pale in dying differ from Series B. by their silky lustre. 



I. Disciformes (disc-shaped). Pileus more or less equally fleshy, convex 

 then plane or depressed, regular, obtuse ; gills at the first adnate or regularly 

 adnato-decurrent. Normally solitary. 



* Pileus cinereous or fuscous. 

 ** Pileus violaceous, rufescent. 

 *** Pileus becoming yellow. 

 **** Pileus green, becoming pale. 



Colour white, shining "whitish. Cautiously distinguish whitened 

 hygrophanous species and white Paxilli. 



II. Difformes (irregularly shaped). Pileus with fleshy disc and thin margin, 

 at the first umbonate, then expanded and depressed, irregular. Gills -unequally 

 decurrent, running down in one place for a short and in another for a longer 

 distance, sometimes even rounded on one side of the stem or only reaching it, 

 as in the Tricholomata. Stem externally somewhat cartilaginous but fibrous. 

 Ccespitose, often connate and very various in form, but sometimes solitarv. 



III. Infundibuliformes (funnel-shaped). Pileus attenuated from the fleshy 

 disc towards the margin, at length wholly funnel-shaped or deeply umbilicato- 

 depressed in the centre. Stem spongy with a fibrous outer coat. Gills descend- 

 ing, at tfie first deeply and equally decurrent. Pileus often losing colour or 

 becoming pale, but not hygrophanous. 



* Pileus coloured or becoming pale, the surface (at least under a lens) innate- 

 fiocciilose or silky, bibulous, not moist. 



** Pileus coloured or pallid, smooth, moist (in rainy weather). Variable 

 in colour and stature (the pileus being undulato - lobed is a point of no 

 consequence). 



*** Pileus shining whitish, sprinkled over with small superficial fiocci or 

 becoming smooth. 



Series B. Pileus fleshy-membranaceous, truly hygrophanous. Flesh thin, 

 soft, watery, hygrophanous. (ll'hite species, u'/iic/i only become more shining 

 white when dry, have been inserted among the foregoing.} 



IV. Cyathiformes (cup-shaped). Pileus fieshy-mcmbranaceous (composed of 

 'two membranaceous plates), without a compact disc, hygrophanous as well as the 

 fiesh, depressed then cup-shaped ; gills at first adnate, then decurrent, descend- 

 ing, straight. Colour dingy when moist. Compare Omphalia, Hydrogrammi. 



V. Orbiformes (round-shaped). Pileus somewhat fieshy, moist within and 

 without, hygrophanous, convex then becoming plane or depressed, polished, not 

 squamulose or mealy ; gills plane, horizontal, thin, crowded, adnate or only 

 decurrent with a small tooth. Colour dingy or becoming watery-pale. Most of 

 the species are of a low rank, and are recognisable with difficulty and only in 

 rainy weather, on acco^^nt of the changeableness of their colour, and the indis- 

 tinctness of their characteristic marks. 



* Gills becoming cinereous. Pileus at the first dark. 

 ** Gills whitish. Pileus becoming pale. 



VI. Versiformes (variable in shape). Pileus thin, convex then irregularly 

 shaped, tough, more or less squamulose or furfuraceous ; gills adnate (not 

 decurrent or only with a small tooth), broad, rather thick, for the most part 

 distant and powdered with white meal. Colour hygrophanous. Stem tough, 

 sometimes with a veil. The species are all very distinguished, as they differ 

 exceedingly in stature and form and colour. 



* Pileus dirty-coloured or made dusky with darker squamules. 

 ** Pileus bright, of one colour. 



