394 FUNGUS-FLORA. 



Intermediate between 0. Tiepatica and 0. umbellifera ; dif- 

 fering from the former in the pileus being striate when 

 moist, and the gills not being connected by veins ; from the 

 latter in* the gills being narrowed behind. Known from 

 0. rmtica in the absence of a grey tinge in the pileus and 

 stem. 



Omphalia umbellifera. Linn. 



Pileus about f- in. across, rather fleshy, convex then almost 

 plane, often more or less wavy or upturned, radiately striate 

 when moist, even and somewhat silky when dry ; margin at 

 first incurved and crenate; gills decurrent, very distant, 

 broad behind, whitish or coloured like the pileus ; stem about 

 | in. long, 1 line thick, coloured like the pileus, base downy, 

 imperfectly hollow. 



Agaricus (Omphalia) umbelliferus, Cke., Hdbk., p. 96; Cke., 

 Illustr., pi. 271. 



Agaricus umbelliferus, Linn., Suec., n. 1192. 



In swamps, exposed pastures, &c. 



Colour variable, grey, yellow, brownish, green, &c. Fries 

 says the colour is at first watery white, and shining white 

 when dry, and that it sometimes grows on wood. Known 

 among allied forms by the thicker, almost flat pileus, and 

 the broad, almost triangular, very distant gills. 



The floccose substance of the pileus is thicker at the disc 

 than in allied species, hence the pileus is less membranaceous 

 and the umbilicus smaller. Gills very broad behind, trian- 

 gular, decurrent, very distant, margin straight, sometimes 

 dichotomous, &c. Colour very variable, commonly whitish, 

 shining white when dry ; in alpine regions, and on fir trunks 

 clear yellow; pileus usually whitish when dry, often grey- 

 ish in shady or scorched places and with the stem frequently 

 velvety ; on rotten beech trunks and in some shady localities 

 dark umber. (Fries.) 



Var. abiegnus, B. & Br.; Cke., Illustr., pi. 271c. 

 Pale yellow. 



In considerable numbers on a very decayed fir-stump. 

 Var. viridis, Flor. Dan., t. 1672, f. 1 ; Cke., Illustr., pi. 

 271s. 



Every part pale green. 



