Bright yellow on the forest floor

These asparagus-like stalks look for all the world like Pinedrops, a sort of parasitic plant that has abandoned photosynthesis in favour of absorbing nutrients from fungus that attaches to its roots. But pinedrops are typically pinkish/light-yellow, not this flourescent yellow. Information about mycotrophic plants here. We would love to know what these are. We also saw some wine-red ones.