Ridged underside that did not extend into the stipe, smooth top, firm, not hollow stipe, funnel shaped that did not extend into the stipe.
Growing in dirt, under oak and sycamore. Cap about 16 cm across, smooth, mostly dull white, buff at margin. Pores yellow to olive and look full. No blueing on pores or cap when bruised.
Growing under sycamores, high on bank of intermittent stream. Three others in the vicinity.
Growing on a bank along the side of the trail under a Douglas fir and redwood trees. A few small ones scattered you can see in the background of the photos.