Observation 65873: Morchella importuna M.Kuo, O’Donnell & T.J.Volk

When: 2011-04-20

Collection location: Little Rock Rd. Tumwater, Washington, USA [Click for map]

Who: Drew Henderson (Hendre17)

No specimen available

Lots of construction from last year on this road prompted these ascomycetes to float on the scene- all it took was a good 10 degree temp boost and some lamp posts for added nightly heat I think :) Found beneath lamp posts for three city blocks in gravel.

Found a few blocks from the previous Morchella collection I posted earlier today.

We found a large fruting on a similar substrate along a road in West Olympia last year beneath new lamp posts/in gravel as well.

Never seen this “reddish” coloration phenomena on the stem base before with Morchella- similar coloration to Gyromitra esculenta stalks- This cluster has had definitely more sun exposure and I assume that is the cause for the reddish “burnt” hue…. Anyone witnessed this red behavior before? Taxonomical considerations?

The red coloration on stalks is definitely indicative of M. angusticeps from sources I have recently read and all other indicators seem to fit(eg- thin stalk, slender, fragile, etc.)

Species Lists



Proposed Names

43% (3)
Recognized by sight
20% (4)
Used references: All the rain Promises and More(Arora) MDM Jason Hollinger’s post from MO.
The red coloration on stalk is mentioned in most other online sources I’ve read as well.
60% (2)
Used references: vertically-oriented ladder-like pits, dark color, widely conical to ovoid, ridges eroded in age. Kuo et al., 2012, Taxonomic revision of true morels (Morchella) in Canada and the United States

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Eye3 = Observer’s choice
Eyes3 = Current consensus


Add Comment
By: Danny Newman (myxomop)
2012-04-12 16:57:40 CDT (-0500)

no mention of reddening of the stipe of M. importuna in Kuo et al. 2012, then again these could just be old and sun-scortched enough to have darkened, though not in the same way as the staining seen in M. rufobrunnea.

edit: the stark contrast in pit & ridge pigmentation should be at least one way of separating the two; dark ridges pale pits for M. importuna, the opposite for M. rufobrunnea. that puts M. importuna on top. the “laddering” is super conspicuous too.

M. rufobrunnea
By: BlueCanoe
2011-04-21 10:21:43 CDT (-0500)

The reddish coloration and non-mycorrhizal nature fit the description of Morchella rufobrunnea, although the pitting looks more like O’Donnell’s “Taxon J”: http://www.mushroomexpert.com/mdcp/results_legend.html

Created: 2011-04-21 01:42:38 CDT (-0500)
Last modified: 2012-04-12 17:27:45 CDT (-0500)
Viewed: 348 times, last viewed: 2018-08-10 15:12:13 CDT (-0500)
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