Observation 46055: Tricharina praecox var. intermedia


[admin – Sat Aug 14 02:19:13 +0000 2010]: Changed location name from ‘Yosemite NP, just east of Crane Flat, along Big Oak Flat Rd.’ to ‘East of Crane Flat along Big Oak Flat Rd., Yosemite National Park, Mariposa Co., California, USA’

Species Lists


Proposed Names

1% (2)
Recognized by sight: small, sessile, clustered orange cups, in burned area.
-10% (3)
Recognized by sight: Though not necessarily S. scutellata as the “eyelashes” are not so pronounced and these appear to be generally smaller. Michael Kuo might posit S. setosa in this instance, but microscopy would be required.
-8% (2)
Recognized by sight: maybe melaloma
31% (2)
Recognized by sight: Just add more things it could be…
29% (1)
Recognized by sight: sparse, pale short hairs, clear to yellowish to light brown.
Based on microscopic features: spores smooth, ellipsoid, no guttules. 15 × 11 microns.
54% (1)
Based on microscopic features: spores smooth, ellipsoid, without guttules. Hairs emerging from the outer layer of the fruitbody, not embedded. Macro- and microcharacters fit T. praecox, which grows on burnt ground, but maybe there are more species out there..
35% (2)
Recognized by sight: this species has been collected at Yuba Pass before. the photos of it fit. I couldn’t find a micro description anywhere tho…can you??

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= Observer’s choice
= Current consensus


Add Comment
Tricharina praecox
By: Darvin DeShazer (darv)
2010-06-03 19:47:15 CEST (+0200)

The key in Yang and Korf’s monograph sited below, quickly takes this photo to Tricharina praecox, not T. gilva. To get the variety, you will need to do a chemical test and check under the scope.

both praecox and gilva are listed for Yuba Pass…
By: Debbie Viess (amanitarita)
2010-06-03 19:36:11 CEST (+0200)

but I identified neither.

Perhaps Mike Wood, surely lurking here, would care to comment? He is usually there for that class, and might know.

By: Irene Andersson (irenea)
2010-06-03 18:58:35 CEST (+0200)

in Yang and Korf’s monograph, three varieties on pages 502-509. It also says that praecox is notoriously misidentified as gilva.
We have done the same mistake in Scandinavia too. Almost every collection of Tricharina in our herbariums have been redetermined from gilva to praecox (var. cretea in our case).
I think one of the reasons is that Fungi of Switzerland has described praecox, but named it gilva, So, if you have access to their ascomycete volume, you’ll find it there too (I don’t have it available, so I don’t know how it looks there).
Debbie, do you know how the former collection from Yuba was identified?

is there a good description somewhere for praecox?
By: Debbie Viess (amanitarita)
2010-06-03 18:32:50 CEST (+0200)
thanks Robert…great reference.
By: Debbie Viess (amanitarita)
2010-06-03 16:43:45 CEST (+0200)

Looks to be a good match on all levels.
thanks all, for this fun, cooperative ID!

more info
By: Robert Sasata (Sasata)
2010-06-03 16:23:59 CEST (+0200)

in Yang and Korf’s monograph, Mycotaxon 1985: http://www.cybertruffle.org.uk/...

sparse, short pale brown hairs at cups edge…
By: Debbie Viess (amanitarita)
2010-06-03 05:49:57 CEST (+0200)

but smooth, ellipsoid spores w/out any droplets, and on ground in a burn.
now what??!

I hear you!
By: Debbie Viess (amanitarita)
2010-06-02 19:18:05 CEST (+0200)

I will dig these out and scope them today. Anthrocobia macrocystis, another tiny CA burn cup, has a reddish fertile surface. A. melaloma has an orange one. IF these scope out to be Anthrocobia (and I am leaning that way) then melaloma is a better fit.

By: Irene Andersson (irenea)
2010-05-31 21:13:03 CEST (+0200)

in Anthracobia: smooth, ellipsoid, with two large guttules
in Scutellinia: spiny, warty or reticulate ornamentation, globose, ellipsoid or fusoid, with many guttules
in Lachnellula: smooth, globose, ellipsoid or fusoid
in Cheilymenia: smooth, ellipsoid, sometimes visible bubbles (one larger in the middle, could be some smaller ones around it)

Dennis uses microscopic features in his key.
By: Darvin DeShazer (darv)
2010-05-31 18:24:56 CEST (+0200)

Cheilymenia – Yellowish, clear or pale brown hairs
Lachnellula – White hairs
Scutellinia – Brown to black hairs
Anthracobia – On burnt ground with short brown hairs
Ref: Dennis, R. W. G. 1981. British Ascomycetes. J. Cramer, New York, NY. 585p.

By: Danny Newman (myxomop)
2010-05-31 06:59:02 CEST (+0200)

Amazing how similar these genera look to the naked eye; Cheilymenia, Lachnellula, Scutellinia, Anthracobia. All small or tiny, often gregarious, discoid ascos, many with eyelashes at the apothecial margin and an orange color of one kind or another. I wonder if they in fact vary enough under the scope to warrant such distinct phylogenetic placement from each other. It would be interesting to see a thorough treatment of each genus’ unique characteristics.

On burnt ground
By: Darvin DeShazer (darv)
2010-05-30 21:40:44 CEST (+0200)

Irene’s ID seems correct, as does her comment about using the microscope.

What ever happened
By: Irene Andersson (irenea)
2010-05-29 21:05:27 CEST (+0200)

with microscopy..?

the edges of these cups are very hard to see well, in hand or in enlarged photo…
By: Debbie Viess (amanitarita)
2010-05-29 20:52:46 CEST (+0200)

and they got covered in grit in the field. still, by squinting and with a soupcon of wishful thinking, i too can see very discrete hairs at the edge (maybe). both color and hair length seems off for the local S. scutellata, but maybe not. DNA may tell the tale, somewhere down the line…(all specimens for this Yosemite survey have DNA samples taken).

Created: 2010-05-29 20:17:08 CEST (+0200)
Last modified: 2011-05-23 18:33:46 CEST (+0200)
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