HYGROPHORUS. 91 



52. H. unguinosus Fr. Pileus about 5 cent. (2 in.) broad, H yg ro- 

 smeared ivith dense fuliginous gluten, slightly fleshy, campanulate P horus - 

 then convex, obtuse, even, or at length rimosely incised. Stem 



5 cent. (2 in.) long, 6 mm. (3 lin.) thick, hollow, commonly atten- 

 uated at the base and apex, unequal, somewhat compressed, glu- 

 tinous, of the same colour as the pileus. Gills adnate, but very 

 ventricose, distant, thick, broad, connected by veins, shining 

 white, becoming glaucous, soft. 



Inodorous, very fragile, appearing chiefly in later autumn. The fuligi- 

 nous colour is unchangeable. The tough fuliginous gluten on the pileus 

 distils in drops. It differs sufficiently from H. irrigatus in its larger stature, 

 in its watery substance, in the gluten, and in its ventricose separating gills. 



In woods and pastures. Frequent. Aug.-Oct. 



Name unguinosus, oily. From the gluten. Fr. Monogr. ii. p. 144. Hym. 

 Eur. p. 421. Icon. t. 168. /. 2. Berk. Out. p. 202. C. Hbk. n. 577. S. 

 My col. Scot. n. 544. 



53. H. nitratus Fr. Fuscous-cmereotis. Pileus 5 cent. (2 in.) 

 broad, becoming pale, scarcely fleshy, very fragile, convex, obtuse 

 or depressed in the centre, at the first slightly viscid, soon floccu- 

 lose, then squamulose and rimosely incised, irregularly shaped, 

 somewhat repand. Stem 5-7.5 cent. (2-3 in.) long, 6-10 mm. 

 (3-5 lin.) thick, hollow, equal, but often twisted, and at length 

 somewhat compressed, fragile, externally polished, smooth, whit- 

 ish, woven with thick crisped fibres. Gills broadly emarginate, 

 very broad, as much as 18 mm. (tf in.) broad (obliquely ovate), 

 distant, thick, mucid-soft, connected by veins, whitish then becom- 

 ing glaucous. 



The above is the larger and rarer form. B. The smaller form is the com- 

 moner. Pileus 1-2.5 cent - (K-i in.) broad, viscous when young and moist, 

 even, fuscous, but soon dry and rimoso-squamulose, cinereous. Stem 2.5 

 cent, (i in.) and more long, 2-6 mm. (1-3 lin.) thick, unequal, commonly 

 compressed and undulated, sometimes yellowish. Gills at first wholly adnate, 

 even with a decurrent tooth, then ventricose and glaucous, but broad and 

 thick, as if smeared. 



Widely removed from all others by its strong nitrous odour, and by the 

 colour being by no means bright. As regards substance and structure it 

 agrees well with H. coccineus, and affords the best example of the generic 

 character ; the gills are thick, juicy, and the hymenium, which is waxy soft as 

 if composed of fat, is as easily rubbed off from the trama as if it were fat. 

 Very changeable in stature according to locality. 



In pastures. Uncommon. Aug.-Sept. 



Name nitrum, nitre. From its nitrous odour. Fr. Hym. Eur. p. 421. 

 S. Mycol. Scot. n. 545. H. murinaceus Fr. Monogr. ii. p. 145. Berk. Out. 

 p. 203. C. Hbk. n. 578. 



* H. glauco-nitens Fr. Pileus olivaceous-black or fuliginous, 



