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 fro7n 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 adfiate or regularly 

 adnato-decurrent. Normally solitary. 



* Pileus cinereous or fiiscous. 

 ** Pileus violaceous, rufescent. 

 *** Pileus becofning 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 imequally 

 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 co7i7iate and very various in form, but sometimes solitary. 



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

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

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

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

 becojTiing pale, but not hygrophanous. 



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

 flocculose 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 flocci or 

 becoming sjnooth. 



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

 soft, watery, hygrophanous. ( White species, which 07ily beco77ie i7iore shini7ig 

 white whe7i diy, have bee7i i7iserted a77i07ig the foregoi7ig.) 



IV. Cyathiformes (cup-shaped). Pileus fleshy -me77ibranaceous (composed of 

 two membranaceous plates), without a coi7ipact disc , hyg7'ophanous as well as the 

 flesh, depressed the7i cup-shaped ; gills at first adnate, then decurrent, descend- 

 ing, straight. Colour dingy w]ie7i i7wist. Compare 077iphalia, Hydrogra77i77ii. 



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

 without, hygrophanous, convex then becomi7ig plane or depressed, polished, not 

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

 decurrent with a small tooth. Colour dingy or beco77ii?ig watery-pale. Most of 

 the species are of a low rank, and are recognisable with difficulty a7id only i/i. 

 rai7iy weather, on account of the changeableness of their colour, a7id the i7idis- 

 tinctness of their characteristic 77iarks. 



* 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, i/iore or less squa77iulose or fafu7-aceous ; gills ad7iate (not 

 decurrent or only with a small tooth), broad, rather thick, for the i7iost part 

 distant and powdered with white 7/ieal. 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 77iade dusky with darker squamules. 

 ** Pileus bright, of one colour. 



