. Guide to Sowerby's models of British fungi in the Department of Botany, British Museum (Natural History) . 30 GUIDE TO THE MODELS OF FUNGI. are a hundred British species of Pratcllce, eight of which are repre-sented by models. The species with brownish-purple and brownishspores are often confused with the Dcnuini. Some PraMlce producefew spores, and the gills remain white. Sub-genus 21. Psalliota.—There are eleven British speciesof Psalliota (with many varieties) ; two species are represented by models. Psalliota agrees in structure andhabit with Lcpiota; but the spores are darkpurple shaded
. Guide to Sowerby's models of British fungi in the Department of Botany, British Museum (Natural History) . 30 GUIDE TO THE MODELS OF FUNGI. are a hundred British species of Pratcllce, eight of which are repre-sented by models. The species with brownish-purple and brownishspores are often confused with the Dcnuini. Some PraMlce producefew spores, and the gills remain white. Sub-genus 21. Psalliota.—There are eleven British speciesof Psalliota (with many varieties) ; two species are represented by models. Psalliota agrees in structure andhabit with Lcpiota; but the spores are darkpurple shaded with brown, not w^hite ; thegills are free, and the stem is furnishedwith a ring. They begin to appear at theend of summer, and several of the largerspecies are well-known 58. Agaricus arvensis Scha^ff. Horse-Mushroom.—Pileus from three to twelveor more inches across, whitish or whitish-buff in colour, very fleshy, globoso-cam-panulate, then flattened, flocculoso-mealyFig. ^m of Psalliota. ^heu young, then slightly silky or squamu-AgaricuscampestrisL. (One-lose, dry; flesh thick, Compact, white, third natural size.) ,11 ? ^ ,1 • , , generally changmg to yellowish, when cutor broken dull brownish-yellow or brownish-buff; gills free, ventri-cose, broader in front, white, clay-coloured, then reddish-fuscous, atlength purple-black, often moist but never deliquescent; stalk threeor four inches long and an inch or more thick, smooth, white, oftenswollen, hollow, with a lax floccose pith, obsoletely marginato-bulbous when young; ring large, spreading, or pendulous, appearsdouble with the upper portion membranaceous, the lower thickermore or less free at the circumference, and radiatcly split. A. arvensis may be only a coarse variety of the tru
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