California Bleeding Mycena
This is a very common denizen of the oak forests in California, which should be expected under oak in Oregon but has so far not turned up. It is a terrestrial saprobe on oak litter and acorns, especially live oak. Its most distinguishing feature is that it bleeds reddish latex when injured, much like the very similar terrestrial species Mycena subsanguinolenta. Fortunately for identification purposes the latter only grows on conifer debris, and Mycena hematopus, another latex exuder, is only found on wood. The species is reddish brown to orangey brown, darker and redder in the center and fading to buff brownish towards the margins. Caps are smooth, translucent striate peripherally and may attain 2 cm across. Caps are conical to bell-shaped and may flatten out with age. The gills are adnexed, with 15-20 reaching the stipe. Short gills are present. The Gills are pinkish white and strongly marginate, with margins that are brownish orange to reddish orange. They drop a white spore deposit. Stipes are smooth, fragile, dry, hollow, brown to brownish orange, and up to 13 cm in length. If broken they bleed a latex that is reddish orange. Typically they are pruinose apically, with fine orange hairs at the base. There is a mild taste and indistinct odor, with edibility unknown.