Microscopic photos – Ascomata, asci, ascospores, green-yellow “sphaerocysts/cells” in the stripe
Moellerodiscus advenulus (Phillips) Dumont
AC 2417, 2487. Auburn woodlot June 2020, 2021.
Ascomata translucent with orange-yellow to green “sphaerocysts/cells” on the stipe; asci blue in Lugols; spores 7-9×2-4um with gel appendages.
Seems to be widespread on Larix sp needles in June in the litter beneath trees. An excellent description is presented by Fallah & Shearer (2001) and the Freshwater Ascomycetes website. Some excellent photos are found on ASCO-SONNEBERG website as Calycina/Antinoa spores a bit larger and no apparent appendages. There is a R.F. Cain collection (Phialea advenula) near Norwich Ontario on Larix needles RF 2761 annotated by KP Dumont in the NYBG on Mycoportal. I assume the rest of the material is in TRTC. The best generic name for the species is not clear. The latest treatment discusses its placement in Lambertella (Zhao et al. 2016).
Fallah & Shearer, 2001. Freshwater Ascomycetes: new or noteworthy species from north temperate lakes in Wisconsin. Mycologia 93: 566-602.
Freshwater Ascomycetes, http://fungi.life.illinois.edu/species_monographs
Zhao et al., 2016. Taxonomic re-evaluation of the genus Lambertella (Rutstroemiaceae, Helotiales) and allied stroma-forming fungi. Mycological Progress 15:1215-1228.