118 
HYMENOMYCETES 
very broad, pink, then flesh colour, blackish-brown at 
maturity. 5 . 3-4 in., stout, stuffed (elongated, bulbous, and 
hollow in the var. silvicola). R. median, thick, persistent. 
In rich pastures, particularly where salt has been strewn. 
Very variable. Var . pratensis, P. adorned with small rufous 
scales. Var. rufescens, G. at first quite white, very distinct 
in the bright-red flesh when bruised. 
A. arvensis ( avvum , a cultivated field), “ Horse Mush¬ 
room.” Plate XXXVIII. 13. 
P. 4-18 in., white, stained yellow, flesh yellowish. G . free, 
broadest in front, whitish, then dark purplish-brown. 
S. 2‘5 in., very stout, firm, soft in the centre, which is loose 
and thread-like. R. pendulous, double. Common in pastures 
(particularly where horses have been fed) in spr. and aut., 
often growing in large circles. Smell strong. Edible. The 
mushrooms cultivated by gardeners are said by W. G. 
Smith to be a variety of this species, not of A . campestris, as 
is usually supposed. 
CHITONIA 
(Gr. chiton , a tunic—from the veil enveloping the plant in 
infancy) 
C. rubriceps (ruber, red; caput , the head—from the red 
pileus). 
P. f-i in., umbonate, reddish-brown. G. free, narrow, 
crowded, purplish-brown. S. 3 in., slender, hollow, paler 
than the pileus. V. large, free, margin irregularly torn, 
whitish. An exotic species found on soil in the Aroid 
House, Kew Gardens. 
