This is Snow Plant. It grows in Yosemite Valley. We’ve seen it before, but only from the open-air tour bus. This is the first time we were able to get close to it. It was growing just off the path behind our campground.

Sarcodes sanguinea
Snow Plant

Snow plant is a red, fleshy, glandular-hairy saprophyte lacking chlorophyll with simple stems either solitary or in clusters growing to 20″ tall from a thick, brittle root.