Glossostigma elatinoides (Benth.) Benth. ex Hook. fil., Fl. Nov.-Zel. 1: 189 1853. (syn: Tricholoma elatinoides Benth.);
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SE. Australia, New Zealand as per POWO;
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Glossostigma Elatinoides: 1 high res. image.
elatinoides. You will notice that the juvenile leaves (a couple in this photo but not many) do resemble diandrum a bit – not yet fully rounded. As you can see diandrum and elatinoides are very distinct and easy to distinguish apart.
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References:
POWO Catalogue of Life The Plant List Ver.1.1