50 AGARICINI. 



Genus VIII. OMPHAIylA. Fr. An Umbilicus. 



Stem cartilaginous, fistulous, but having the tube often 

 stuffed with flocci, thickened upwards like a trumpet into the 

 pileus. Gills truly decurrent. It is separated from Mycena 

 and Collybia by the decurrent gills. The pileus is generally 

 umbilicate, funnel-shaped. The species arcwell marked, are 

 small in size, none larger than one inch broad. I have but a 

 few species to record. No doubt on account of their small 

 size they are often overlooked. 



O. umbellifera. Linn. Umbel Omphalia. 



Pileus, one-half inch broad, whitish, convex, plane, 

 broadly obconic, slightly umbilicate, rayed with darker striae. 

 Gills, decurrent, triangular, very distant. 

 Stem, short, dilated towards the apex. 

 Commonly growing on stumps. 



O. pyxidata. Bull. The Box Omphalia. 



Pileus, as much as 2.5 cent, (i in.) broad, very hygropha- 

 nous. ^ rick-rufescent or rufous-fuscous when moi.st, becoming 

 pale, opague when dry, membranaceous, peliucid, umbilicate 

 then infundibiliform, when moist smooth, sometimes at the 

 margin, sometimes wholly radiate, striate, when dry flocculose 

 or slightly silky. 



Gills, decurrent, somev/hat distant, distinct, narrow, but 

 broader at the middle, flesh color, thin, pale yellowish. 



Stem, thin, cartilaginous, fistulous. 



A small brown toadstool, growing in grassy lawns, almost hidden by 

 the grass and weeds. 



O. campanella. Batsch. Bell Omphalia. 



Pileus, membraneous, convex, umbilicate, striate, hygro- 

 phanous. 



Gills, decurrent, arcuate, j^ellowish. 

 Stem, fistulose, clothed with down. 

 A small species found in different localities in the Valley, 



