Day 156: The difficulty in accurately identifying Bloody Heart Lichen (Mycoblastus sanguinarius) is that it has a look-alike in its relative, M. affinis and both occur in the Pacific Northwest. To further add to the difficulty of making a positive ID, not all examples of M. sanguinarius have the characteristic red pigment at the base of their apothecia, visible when cut in half from top to base. When confronted with atypical specimens, it is easy to misidentify them as affinis.
I was unaware of this issue until I discovered a research paper from the National Institute of Health yesterday. In fact, the paper suggested that many examples identified as affinis were in fact its sanguine cousin. The ones I was finding around Longmire showed no pigmentation, but did not entirely conform to the profile for affinis, either. I felt certain that they were sanguinarius, so I set out on a snowy mission. Halfway to Cougar Rock, I found my target species. It was quite gratifying to see the bloody heart of this dot lichen revealed upon being sectioned with my thumbnail.
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