Observation 160547: Leucangium carthusianum (Tul. & C. Tul.) Paol.
When: 2014-02-21
No herbarium specimen

Notes: Found by Umami Truffle Dogs Team in a Douglas fir farm near McMinville. A gift from Richard Tullis who participated in the foray.

Spores ~75×45.

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Eye3 = Observer’s choice
Eyes3 = Current consensus

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Spores match,
By: Daniel B. Wheeler (Tuberale)
2014-03-04 10:13:33 PST (-0800)

but peridium and interior don’t. The spores of L carthusianum are slightly elongated, termed fusoid. The peridium is charcoal-black to gray.

In Kalapooyia brunneum (formerly Leucangium brunneum), the peridium is dark brown with black spots, often areolate in maturity, spores rounded ellipsoid; gray spore pockets.

Leucangium carthusianum should have a white exudate on freshly-cut surfaces. K. brunneum has yellowish exudate.

Spores of L.c. are 65-80 × 25-40 microns. Spores of K.b. are 45 × 30 microns. (Source: NATS Field Guide To Selected North American Truffles and Truffle-like Fungi)

If spore measurements correct, may be an interesting hybrid between species or yet another species novum.

Created: 2014-02-28 01:12:08 PST (-0800)
Last modified: 2014-03-17 09:40:59 PDT (-0700)
Viewed: 50 times, last viewed: 2017-01-04 11:46:47 PST (-0800)
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