Collection location: Howarth Park, Santa Rosa, Sonoma Co., California, USA [Click for map]
Solitary under Douglas fir, oak, madrone, bay. Gills pale yellow, stipe, pileus viscid and blackening. Viscid stipe led me to H. singeri rather than H. conica. Mykoweb calls H. conica subviscid—-I’m not sure of the distinction. This one felt mildly viscid.