Σημειώσεις: See observation 67065 offered by Michael Wallace, in which the form originally described as a Thaxterogaster by E. Horak is exquisitely documented. Michael noted that he had not seen the form associated with Nothofagus; only the ones which grow with Kunzea and Leptospermum.
The observation offered here is of the form which lacks the obvious stipe-columella. Shirley Kerr kindly informed me of the identification and existence of the two forms.
Before knowing any of this, my field ID had been that it was a Protoglossum.
Two images offered here: one manipulated among the moss in which the basidiomata were erumpent, and a studio portrait.
Specimen deposited in NY (REH9706).