Excluding Hygrocybe!
Lichenomphalia is a genus of lichenised mushrooms. All the historical names used for the NZ species are incorrect and we have a number of undescribed ones. Here's a preliminary key reflecting my understanding of the genus in NZ together with other inamyloid-spored omphalinoid fungi which could be mistaken for Lichenomphalia.
1 |
Associated with mosses or on soil and not associated with algal cells at base of stipe. Hyphae clamped. |
2 |
1’ |
Always associated with green algal cells at base of stem. Hyphae unclamped. |
4 |
2 |
Cap, gills and stem tan coloured, alpine |
Omphalina colensoi |
2’ |
Fruitbody with yellow or cream colours, not alpine, gills white, often in lawns |
3 |
3 |
Fruitbody bright yellow cap/stem (if orange then consider Camaraophyllus delicatus, or Atheniella or Mycena acicula) |
Rickenella fibula sensu lato |
3’ |
Fruitbody darker colours, stem apex often violaceous |
Rickenella swartzii |
4 |
Associated alga of obvious flattened squamules. Frb white, flat topped, with lilac tinges at the base. Open areas |
Lichenomphalia 'Cobb valley' |
4’ |
Associated alga smaller granules or an algal mat. Frb brown, cream, orange, yellow, pink |
5 |
5 |
Frb with tan colours, cap convex, undulating, stem scurfy, especially towards base. |
Lichenomphalia 'Otira Gorge' |
5’ |
Frb with other colours, or cap flat or depressed, and stem not scurfy |
6 |
6 |
Frb cream to pink or yellow, in sphagnum bog, spore Q > 2 |
Lichenomphalia 'Lewis Pass' |
6’ |
Frb yellow to orange, spore Q < 2 |
7 |
7 |
Frb bright lemon yellow, alga granular, spore Q 1.7-1.9 |
Lichenomphalia alpina sensu NZ |
7’ |
Frb orange-yellow, alga a mat, spore Q < 1.7 |
Lichenomphalia chromacea. |
Omphalina rivulicola aff. (=O. colensoi)
https://inaturalist.nz/observations/1441579
Possibly Omphalina pyxidata sensu NZ is a synonym and is a misapplication of the northern hemisphere O. pyxidata.
NZ material has a sequence match to O. antarctica. The species has been moved into .Arrhenia and has a drawing of the holotype looking somewhat different to this and the Genbank sequence a likely misidentification.
Omphalina wellingtonensis is described from New Zealand but is not a typical Omphalina in the modern sense. It looks superficially like Marasmius croceus/elegans but is more closely related to Mycena acicula (which is currently not correctly placed in Mycena)
Rickenella fibula
https://inaturalist.nz/observations/961400
Rickenella swartzii
https://inaturalist.nz/observations/1365687
Lichenomphalia 'Cobb valley'
https://inaturalist.nz/observations/1439272
Lichenomphalia 'Otira Gorge'
https://inaturalist.nz/observations/1354682
This is Lichenomphalia velutina sensu NZ, a misapplication. Some specimens of L. umbellifera ss NZ are also referable to this species. It is related to L. velutina/grisella of the northern hemisphere.
Lichenomphalia 'Lewis Pass'
https://inaturalist.nz/observations/1439264
Lichenomphalia alpina ss NZ
https://inaturalist.nz/observations/1439269
Lichenomphalia chromacea
https://inaturalist.nz/observations/1439274
Cantharellula alpina Stevenson is a synonym. Horak (1971) A Contribution towards the Revision of the Agaricales (Fungi) from New Zealand. New Zealand Journal of Botany, v9, pp403-462 considered this to be a Hygrophoropsis but re-examination of the type indicates it is a good species of Lichenomphalia.
L. umbellifera sensu NZ is a misapplication of this species or L. sp. 'Otira'.
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