CRYPTOGAMIA. FUNGI. Agarious. 
153 
Ag. liste'ri. Gills whitish, numerous and narrow : pileus smooth, 
irregular, flattish, depressed in the centre : stem white, eccentric: 
juice like milk. 
(FI. Dan. 1132. E.)— Bull. 200— Bolt. 21—( Sowerby 104. E.) 
Gills decurrent, white, or yellowish white, numerous, uniform, or in pairs, 
very fine, close set like the teeth of an ivory comb, not one-tenth of an 
inch broad. 
Pileus white, smooth, irregular, flattish, but more or less depressed; edge 
turned down; from three to seven inches over; generally set sloping on 
the stem. 
Stem solid, whitish, two inches high and one in diameter, generally eccen¬ 
tric, blunt and rounded at the bottom. Sometimes three or four grow 
together, very large, even ten inches diameter, remaining a long time in 
dry seasons. Milky juice very acrimonious, with a bitterish taste. 
(Lister’s Agaric. E.) Haughwood, Capler Hill, Woolhope, Hereford¬ 
shire. Specimen and observations from Mr. Stackhouse. 
This, and its varieties, have very generally been supposed by the English 
botanists to be the Ag. piperatus. Linn. Avho led them into the error, by 
quoting Haller and Bauhine for synonyms to his piperatus; synonyms 
which undoubtedly belong to the species described by Dr. Lister, but by 
no means according with the Swedish plant. To avoid perpetuating this 
confusion, I have rejected the trivial name piperatus ; though applied to 
it by J. Bauhine, who seems first to have given a good description of it. 
J. B. Hist. iii. p. 825. cap. 6. Dr. Lister first observed it in England. 
His description, partly copied from J. Bauhine, may be found in Ray Cat. 
p. 123, and also in llay Hist. p. 88. o. 9. The Doctor remarks that 
the juice is mostly poured out by the external parts of the plant, that 
it did not change the surface of polished steel, that it became green when 
dried, but still retaining its acrid biting quality. He observed too that 
the plant was much eaten by insects and snails. Ray Svn. 4. 14. 
Ag. lactifluus acris. Bull. Ag. piperatus. Bolt. (Pers. 
Sowerby imagines his tab. 245 to represent the genuine Ag. Listeri , rather 
than the figure above cited. It certainly bears some resemblance to a 
variety of that species, but differs materially in having a deeply coloured 
stem, and the lactescent drops also coloured as exhibited in tab. 245. E.) 
Var. 2. Gills connected by transverse threads: pileus light drab colour, 
very viscid: stem tapering downwards. 
Gills decurrent, white, yellowish with age, irregular, much broader than in 
the preceding. 
Pileus light brown or drab colour, hollowed in the centre, four or five 
inches over. 
Stem solid, white, inversely conical, one and a half inch long, quarter to 
half an inch diameter ; generally eccentric. 
The juice white like milk, hot aud acrid, but not properly peppery. 
Under large beech trees, plantations, Edgbaston. Oct. 
Var. 3. Gills yellow white, numerous, and narrow : pileus white, oblique. 
B attar. 17. K—Schasff. 83—Bats eh 59. 
Ag. piperatus. Batsch. In woods, Woolhope, Herefordshire. Mr. Stack- 
house. 
Var. 4. Gills white: pileus buff, with yellow brown concentric circles. 
Bull 104. 
