2 2 GUIDE TO THE MODELS OF FUNGI. 



rare, but common in the neighbourhood of London and other towns. 

 It usually grows in clusters on squared timber, and may frequently 

 be seen in wood-yards ; it is less common on tree trunks and stumps, 

 and generally appears late in the autumn or in early winter ; 

 sometimes it may be found in mid-winter. The whole plant is pale 

 orange-buff, nankeen, or rufescent flesh-colour. It looks and cuts 

 like raw veal. 



40. Agaricus ostreatus Jacq. Oyster Fungus. — Pileus fleshy, 

 soft, conchiform, somewhat dimidiate, smooth and moist, yellowish- 

 brown, grej'-brown, brown, or black-brown in colour ; gills decurrent, 

 anastomosing near the stem, somewhat distant, broad, white, some- 

 times turning light yellow; stalk short, firm, elastic, oblique, thicken- 

 ing upwards, white, hairy at base, sometimes obliterated. 



This is a common species, and grows in clusters on the elm, 

 poplar, willow, ash, apple, laburnum, and other trees; on rare 

 occasions a single specimen may be met with as shown in the model, 

 but it is usually caespitose and imbricated ; it appears in autumn 

 and early winter, sometimes mid-winter or spring. Its specific 

 name was suggested by the colour and shape of the pileus. 



The odour is strong and disagreeable. 



It has long been considered esculent, but is not generally 

 esteemed. An allied plant named A. cuosmus, said to be dangerous, 

 is often confounded with A. oslrcatus. 



Mr. Plowright has recorded in Grcvilka (vol. v., p. 64) the 

 occurrence of this species on dry, cerebral matter in the skull of a 

 stranded whale at King's Lynn. 



41. Agaricus tremulus Schneff. — Pileus brownish-grey, hygro- 

 phanous, slightly (Icshy, dimidiate, reniform, depressed and smooth, 

 but often villous behind ; gills adnate or decurrent, linear, somewhat 

 distant, grey; stalk very short, but distinct, grey, terminating at the 

 base in a woolly mass. 



A small, variable, and rare species, growing on mosses, fungi, 

 rotten wood, or on the ground. 



Series II. — Hvporhodii. 



Spores salmon, yellowish-saiiiKiii, pale rose, rubiginous, brown- 

 ish-pink, or nankeen. Sometimes Agarics with clay-coloured spores, 

 belonging tu .Scries III. Dcruiitii, arc confounded with the Ilyporhodii. 

 There are loi liritibh species oi Hypor/ioclii, four of which are re- 

 presented by models. 



Sub-genus 10. Volvaria. — There are nine British species of 

 Volvaria, of which one is represented by a model. In its early 

 stage the entire fungus is enveloped in a wrapper or veil, as shown 

 in the small section on the left side of the illustration. This veil, 



