Observation 160547: Leucangium carthusianum (Tul. & C. Tul.) Paol.

When: 2014-02-21

Collection location: Yamhill Co., Oregon, USA [Click for map]

Who: Sava Krstic (sava)

No specimen available

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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Spores match,
By: Daniel B. Wheeler (Tuberale)
2014-03-04 13:13:33 CST (-0500)

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 04:12:08 CST (-0500)
Last modified: 2014-03-17 12:40:59 CDT (-0400)
Viewed: 51 times, last viewed: 2017-06-18 01:05:26 CDT (-0400)
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