812 THE AGARICACEAE OF MICHIGAN 



868. Mycena acicula Fr. 



Epicrisis, 1830. 



Illustrations : Fries, Ieones, PI. 85, Fig. 3. 

 Cooke, 111., PL 190. 

 Patouillard, Tab. Analyt, Xo. 108. 

 Atkinson, Mushrooms, Fig. 98, p. 98, 1900. 



PILEUS 2-4 mm. broad, campanulate-convex, sometimes papillate, 

 glabrous, glaucous, striatulate on margin, vermillion, reddish-orange 

 or yellowish with red center. FLESH very thin, membranaceous. 

 GILLS adnexed, ascending, ventricose, rather broad, subdistant to 

 distant, yellow, yellowish, creamy white, or white, edge minutely 

 crenulate. STEM 2-5 cm. long, filiform, equal, toughish, hollow, 

 glabrous or minutely pulverulent at first, pellucid-yellowish or 

 yellow, more or less rooting. SPORES 7-9x2.5-4 micr., narrow, 

 fusiform or narrowly subovate, smooth, white. CYSTIDIA none. 

 ODOR none. 



Gregarious or scattered. On rotten wood, or among leaves and 

 grass, in woods, meadows, thickets, etc. Ann Arbor, Detroit, etc. 

 May-June and September-October. Frequent. 



This is a pretty little Mycena and one of the earliest to appear. 

 It is not by any means limited to the woods or to growing on wood 

 or twigs as most authors remark, but may be found among grass on 

 the ground in low, moist meadows in spring. The spores are quite 

 characteristic and help not a little in its positive identification. I 

 suspect, in fact, that it has been reported as M. adonis Fr. when 

 occurring on the ground in grassy places, but no spore measure- 

 ments of that species seem to have been printed. On decayed wood 

 the stem is rooting and hairy along the root, whereas on the ground 

 it has few hairs and is scarcely at all rooting. Other minute 

 Mycenas with rosy or red caps have been described by Fries from 

 Europe: M. stipularis and M. juncicola have non-rooting stems in- 

 serted on stipules of fallen leaves; M. pterigenus lias a bulbillose 

 stem attached to roots and leaves of ferns, etc. 



Omphalia Fr. 

 (From the Greek, omphalos, an umbilicus.) 



White-spored. Stem cartilaginous, slender, usually hollow or 

 loosely stuffed, widened above with the pileus in trumpet-form. 



