Pitted onion (Allium lacunosum) is a small wild onion. Flowers can be white or pale pink, and have dark veins running down the center of each petal. low-growing, reaching just over one foot at its highest. It generally has two long slim leaves, either cylindrical or flat, that often are longer than the stem; sometimes these die by the time the flower is in bloom, so it can appear virtually leafless.
Marin County is the northern limit of this California endemic; it ranges from the coast to the mountains and can be found across much of the southern part of the state. All parts of it were sometimes eaten for food by indigenous Californians. 
Flowers Of Marin 