Notes:
Found on Skyline Trail, near the trailhead, growing on a log (Douglas fir or redwood).

Basidia 4-spored (41-50)+(6-11) x (9-11). Spores 10-13 × 6-7. Cheilocystidia forming a sterile band 50-57 × 10-13, but also wider, and irregularly shaped. Hyphae of the pileipellis gelatinized, those of stipitipellis not gelatinized. Caulocystidia numerous and quite decorated with cylindrical or irregularly shaped excrescences. Clamps present, but not staring at you.

I’m puzzled by the variability of micro-features in several collections of M. purpureofusca that I looked at. The differences with the Perry & Desjardin’s M. bulliformis nom. prov. are not clear cut in my mind. I have Perry’s description (without drawings) of the new species, where he points out “more ornamented cheilocystidia” as a distinguisher, but also states that the pp hyphae in M. bulliformis are not embedded in gelatinous matter. (Almost) caespitose habit might speak in favor of M. bulliformis too.

Species Lists

Images

Basidia, spores.
Basidia, cheilocystidia.
Cheilocystidia.
Cheilocystidia.
Cheilocystidia.
Caulocystidia.
Caulocystidia.
Caulocystidia.
Hyphae of the pileipellis.
Hyphae of the pileipellis.
Hyphae of the pileipellis.

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Created: 2015-12-30 14:54:28 JST (+0900)
Last modified: 2016-01-01 17:28:31 JST (+0900)
Viewed: 63 times, last viewed: 2019-05-21 15:51:51 JST (+0900)
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