Pseudobaeospora aphana, characterized by a brownish pileus with a lilac sheen, yellowish lamellae, a cutis of narrow hyphae on a subpellis of relatively wide and short cells, absence of cheilocystidia and color changes in KOH, and abundant clamp connections, is described as new. It was discovered during the Jan 2007 Mycoblitz at Point Reyes National Seashore, the fourth such event in an ongoing effort to inventory the mycoflora of this national park.