Observation 47388: Stephanospora flava (Rodway) G.W. Beaton, Pegler & T.W.K. Young
When: 2010-06-22
No herbarium specimen

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Eye3 = Observer’s choice
Eyes3 = Current consensus

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Identification source
By: Daniel B. Wheeler (Tuberale)
2010-06-23 09:01:15 PDT (-0700)

You may wish to send some dried sporocarps of this observation to Ian Hall, author of The Black Truffle. My copy of his book lists his address as: Ian R Hall, Invermay Agricultural Centre, New Zealand Institute for Crop & Food Research Limited, Private Bag, Mosgiel, New Zealand. I would expect Ian to have a better handle on New Zealand fungi than I.

New species?
By: Daniel B. Wheeler (Tuberale)
2010-06-23 08:47:44 PDT (-0700)

Possibly new genus? There are at least 4 genera currently known of hypogeous fungi related to Russulaceae: Macowanites, Gymnoporus, Leucogaster and Leucophleps.

Macowanites typically has a vestigial stipe and/or columella extending into the gleba. I see no vestigial stipe nor columella on these specimens.

Gymnomyces has a thin peridium composed of felt-like hairs. I do not see this peridium on these sporocarps. This observation has extremely wide locules within the gleba, compared with the extremely small locules (10-20 per mm) in Gymnomyce.

Leucogaster is characterized by a white loculate gleba which usually exudes copius latex when cut. I see no latex present. Usually Leucogaster locules are filled with gell or latex. I see neither here.

Leucophleps has relatively large locules 1-2mm across within a white gleba. When mature, it can have a very pleasant and attractive odor of sweet coconut, similar to a Mounds candy bar. The locules in these specimens appears to be much larger, and are often lined with white tissue. I suspect this is the hymenium, but without microscopy cannot be certain.

Need microscopy on this specimen, as well as written characteristics as freshly found. Sporocarps appear fairly large, but need confirmation: a small measuring device included with the photos would be valuable.

Also need potential host trees/shrubs/plants nearby. Possible host trees could be a considerable distance. A 100-foot-tall tree 200 feet away could still be a host for this collection.

I have seen nothing like it. However, I am ignorant of most hypogeous fungi in New Zealand, so my opinion may mean nothing.

Created: 2010-06-23 02:34:01 PDT (-0700)
Last modified: 2014-04-14 16:44:14 PDT (-0700)
Viewed: 177 times, last viewed: 2016-10-24 20:15:40 PDT (-0700)
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