Observation 185229: Pisolithus Alb. & Schwein.
When: 2014-10-22
No herbarium specimen

Notes: With Arbutus. Lumpy.

This has been common – Pisolithus like to grow up against something soli – crubs, sprinkler heads, other trees. They don’t seem to grow at the base of their own tree, though.

The ~.1mm peridium is highly contrasty white & black (white “base” color), the major sulca entirely charcoal, featuring the grotesque texture of the exposed dried interior matrix. The peridium is ~.5mm if you count the tough inner yellowish matrix layer attached under it. Scratched, the peridium exposes this yellow area. I’m hypothesizing this distinguishes Arbutus ones from Pine & Eucalyptus ones.

No distinct protruding root on this one, just a rounded bottom (with the root properties). Vivid cadmium yellow. When scratched/rubbed, bruises orange-brown, or, worse, red-brown. Its exterior is finely fuzzy, but touching it easily squishes it to look just flat. Distinctly assimilating the soil/pebbles/roots around it (this is typical). Looks as if a liquid permeated the soil and solidified into the root. When ripped, the woody center of the root (hadn’t noticed this component before) is whitish, bruising to pale pink or, worse, reddish brown.

Interior peridioles etc.:

Stage 1:
- The yellowish upper root mass is dotted with ~1mm yellowish orange → reddish brown → chocolate brown spots. These become the black areas in the famous black & white mottled next stage. Similar to those, when injured, they bleed into the surrounding material, turning it darker yellow/brown.
- Thus, in the sporocarp as a whole, the interperidiole matrix “starts” as distinct dots and becomes an indistinct background, while the peridioles “start” as an indistinct mass and become distinct pockets. Cool.

Stage 2:
- Classic indistinct mottled black & white. When cut aggressively, no white or even yellow spots remain, just a sickly green-tinted black mass (see image 433995)

Stage 3:
- Yellow, olive, brown (intermingled, not a clear progression, not much room for them in this thin layer) powdery peridiole exteriors, containing reddish-staining jelly to spore-packed interiors.

Proposed Names

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Add Comment
By: Daniel B. Wheeler (Tuberale)
2014-10-23 15:28:02 PDT (-0700)
About 7" wide (obv. longest dimension)
By: Jacob Kalichman (Pulk)
2014-10-23 13:47:48 PDT (-0700)
What is the
By: Daniel B. Wheeler (Tuberale)
2014-10-23 03:12:02 PDT (-0700)

overall size, Jacob?

Ws just started getting our monsoon fall rains, should have another obs. or two shortly.

Created: 2014-10-22 21:21:27 PDT (-0700)
Last modified: 2014-10-23 03:10:04 PDT (-0700)
Viewed: 27 times, last viewed: 2017-06-19 02:07:36 PDT (-0700)
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