Observation 177684: Tuberales sensu lato

Notes:
Found at 2700ft elevation beneath Douglas fir, lodgepole pine, red alder and yellow cedar. Feet away from a running stream.

Exploding from cracking duff in large cluster.

NOTE: pinkish hue to all specimens- especially young fruit bodies in back of images.

Temp: low 70’s.

Note small hairy rhizomorphs coming from base(turned upside down) in final image.

Gleba: completely white where cut(young specimens).

Single fruit body available for those interested.

Species Lists

Images

IMG_6756.JPG
IMG_6757.JPG
IMG_6758.JPG
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IMG_6760.JPG
IMG_6801.JPG
These were all taken today(9/12/14) two days after first images in the field. The tree roots most closely located to these were cedar and Douglas fir. Notice the deep pinkish/cracked stains to outer skin and black rhizomorphs appearing. I will wait to slice this open and scope the spores once fu...
IMG_6802.JPG
These were all taken today(9/12/14) two days after first images in the field. The tree roots most closely located to these were cedar and Douglas fir. Notice the deep pinkish/cracked stains to outer skin and black rhizomorphs appearing. I will wait to slice this open and scope the spores once fu...
IMG_6800.JPG
These were all taken today(9/12/14) two days after first images in the field. The tree roots most closely located to these were cedar and Douglas fir. Notice the deep pinkish/cracked stains to outer skin and black rhizomorphs appearing. I will wait to slice this open and scope the spores once fu...
IMG_6799.JPG
These were all taken today(9/12/14) two days after first images in the field. The tree roots most closely located to these were cedar and Douglas fir. Notice the deep pinkish/cracked stains to outer skin and black rhizomorphs appearing. I will wait to slice this open and scope the spores once fu...

Proposed Names

20% (2)
Recognized by sight
36% (4)
Recognized by sight
15% (2)
Recognized by sight
-16% (2)
Recognized by sight
28% (1)
Recognized by sight

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Comments

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Thanks for the link, Richard.
By: Daniel B. Wheeler (Tuberale)
2014-09-11 22:24:41 MDT (-0600)

Note the thick peridium in your example. This obs. has a relatively thin peridium.

Of all Calvatia,
By: Daniel B. Wheeler (Tuberale)
2014-09-11 22:20:34 MDT (-0600)

C. fumosa is the least likely, I think. There is no thick peridium. The gleba is not full of powder. There is nothing to suggest it will become powdery at a later date. There is no sterile base. Nothing in the photos suggests C. fumosa.

Please look at other C. fumosa identified here at MO, but entering Cavatia fumosa in the find box near the top of the page.

By: Richard Kneal (bloodworm)
2014-09-11 22:19:47 MDT (-0600)
Calvatia unlikely, RJK.
By: Daniel B. Wheeler (Tuberale)
2014-09-11 22:07:31 MDT (-0600)

Calvatia does not have rhizomorphs attached to the peridium. I admit the gleba looks a little Calvatia-like, though.

Not Hymenogaster.
By: Daniel B. Wheeler (Tuberale)
2014-09-11 22:01:39 MDT (-0600)

The fungus is not loculate that I can tell (chambered). The is a thin outer peridium present, with external rhizomorphs coming off it. There is no interior venation. No columella apparent.

Hymenogaster would have a nauseating gaseous aroma, even when immature. Hymenogaster usually matures at least partially just from being broken apart. The interior of Hymenogaster would have a columella present, and the gleba would be abundantly chambered, with individual locules up to 3 per mm; and the gleba would be gray at a very early age, not white as this is.

There is a hint of venae externae, but no venae internae at all. So not Tuber.

Most likely a form of Gymnomyces, but lacking the much larger locules.

Not any Rhizopogon species I am aware of or have heard of.

My best guess would be Gymnomyces, but this is unlike any Gymnomyces I know of. Try to find more mature specimens, Drew. Will need voucher collection for this as well, and please note the closest tree species.