Galerina semilanceata is a species of mushroom in the genus Galerina native to Washington state and California.
This species is identified by its heavily veined, light colored cap, and small white V shaped powderings that go up the stem. The mushrooms are usually about 3 cm all around.
Galerina semilanceata fruits from fall until spring on moss, including on mossy lawns.
This species is not of concern and is quite common.