Observation 184145: Cystangium
When: 2014-10-19
( 640m)

Notes: 2014101901
Growing under incense cedar. Several ponderosa pine saplings within feet. Observed several of these growing in an area about 4 feet in diameter.

Proposed Names

-7% (2)
Eye3
Recognized by sight
45% (2)
Eyes3
Recognized by sight
Used references: NATS Field Guide To Selected North American Truffles and Truffle-like Fungi, by Trappe, Evans and Trappe.
3% (2)
Recognized by sight

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Eye3 = Observer’s choice
Eyes3 = Current consensus

Comments

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No
By: Daniel B. Wheeler (Tuberale)
2015-11-25 19:28:31 PST (-0800)

venae externae. No venae internae either. Has a columella extending through entire sporocarp. Not Tuberale IMO.

Not “ham-handed”, Aaron. The vast majority of
By: Daniel B. Wheeler (Tuberale)
2014-10-20 16:43:47 PDT (-0700)

truffles and truffle-like fungi are stepped on and over. Many have so few collections it is laughable. Do try to find the “true” base, and bisect the fungus through that spot. There are many species novum out there, and this could be one. Note any color changes, exudates, peridium characteristics (the outer shell), and odor if any.

The North American Truffling Society (NATS.org) was founded to accrue information about hypogeous species, their ramges. amd features. Joining NATS may help you to recognize habitat and features to look for. NATS used to accept truffles from anywhere if dried and labelled. I do not know their current requirements.

Thanks Dan and Christian
By: (Aaron Cena) (mountainplayer)
2014-10-20 10:53:08 PDT (-0700)

This specimen had a fairly elongated base. Hard to tell from this photo due to my ham-handed excavation. Luckily, there are several more fruiting and I can easily collect another sample.

You’d be correct, Christian.
By: Daniel B. Wheeler (Tuberale)
2014-10-20 10:00:26 PDT (-0700)

This is a loculate Russula-relative, Cystangium (formerly Martellia). While Incense cedar rarely supports mycorrhizal fungi, Ponderosa pine support a plathora. Only way to prove that relationship is to trace the mycelium back to the feeder root. IME seedlings often require mycorrhizal fungi to survive their first year: both for nutrients and for the added water adsorption.

Aaron: thanks for sectioning the sporocarp. When examining hypogeous fungi, sometimes it is necessary (as in this case) to section through the base which should have a few strands of mycelium on it. Often there is a slight basal tuft of sterile tissue near the base, which is important for identification purposes. It takes a while to do this. The fungus at its widest point may not be oriented up and down, but rather sideways. The base may be off to one side, too. The peridium here seems to bruise brown. That would support an identification of Cystantium brunnescens (formerly Martellia brunncescens). Usually it is the gleba which discolors or bruises brown.

I’d bet
By: Christian (Christian Schwarz)
2014-10-20 09:48:57 PDT (-0700)

this is one of the sequestrate, hypogeous Russula

Created: 2014-10-20 09:37:52 PDT (-0700)
Last modified: 2015-11-25 19:26:15 PST (-0800)
Viewed: 69 times, last viewed: 2016-10-23 09:31:54 PDT (-0700)
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