Further work on this shows the sequence is 100% identical to a deposit of L. subargillaceus (TENN 57143) from the USA. Apparently it likes Alder. So, yet another new NZ record. In the global monograph on the group the similarity to L. pulvinulus is mentioned. So the NZ picture gets even more confusing.
Grey Smith
2017-07-00
2017/07/08 1:29 PM NZST
New Zealand, Manawatu-Wanganui, Ashhurst, New Zealand
Growing on a rotting piece of driftwood in a riverbed. Fruit bodies up to 35 mm across, dark brown. Gills fawn coloured with serrated edges. Stems short and dark brown.