Observation 163809: Morchella Dill. ex Pers.

When: 2014-04-20

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

(coordinates hidden from public)

Who: Joseph D. Cohen (Joe Cohen)

No specimen available

Habitat: riparian, unburnt
lat/lon added 2020 from memory
Trees include: Populus trichocarpa (Black Cottonwood), Pseudotsuga menziesii (Douglas-fir), Quercus (Oak)
Substrate: soil, in grass

Proposed Names

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= Observer’s choice
= Current consensus


Add Comment
Attn: Joe
By: Daniel B. Wheeler (Tuberale)
2014-04-23 01:25:54 BST (+0100)

The two white-topped ribbed Morchella look similar to what has been described with Quercus garryana (living).

These are curious Morchella, in my experience. Until they were found in a oak savannah in southern Oregon with live trees, I believe most people in Oregon felt all Morchella were saprophytic. These clearly were not. A photo of them was taken, and shown in an old issue of Mushroom, The Journal of Wild Mushrooming. To my knowledge, no one has(d) suggested a name for them, though.

Congratulations on the poplar morels. When I had the Portland Chapter of NATS many moons ago, one of the members lived in eastern Clackamas County. She had large Black cottonwoods in her back yard. She didn’t know what they were. She said they made a mess mowing her lawn, though.

Reasons for doubting americana?
By: Joseph D. Cohen (Joe Cohen)
2014-04-23 00:10:33 BST (+0100)


I’m curious about your reasons for the “Doubtful” vote for Morchella americana.

Was this due to (a) the unsettled state of Morchella taxonomy; (b) something in the photos or Notes which makes M. americana unlikely; (c) both of the above and-or something else?


most close to live Cottonwood
By: Joseph D. Cohen (Joe Cohen)
2014-04-22 18:14:48 BST (+0100)


I collected 9 of the 11 mushrooms in a small area, perhaps 2 m. diameter. They were in the shade of, and within about 5 m. of the trunk of a large, thriving Populus trichocarpa (Black Cottonwood).

The other 2 (top row, right-hand, and bottom row, second from right) were collected by someone else in a different part of the same park. I do not know which trees were closest.

This is a public park, not a burn area, with almost no dead trees.

— Joe

At least two species, Joe,
By: Daniel B. Wheeler (Tuberale)
2014-04-22 17:00:32 BST (+0100)

Tan sporocarps at one species, white-tipped ridges are another.

Were the trees alive? If so, then may be one of several suspected mycorrhizal species from Oregon. Sorry about the intrusion on your hunting sites, but where in Multnomah Co. were these. If not on burn slash, not M. elata or M. angusticeps. Quercus garryana has at least one known mycorrhizal Morchella; I’ve seen photos of it from Southern Oregon.

Black cottonwood also has mycorrhizal Morchella, but very tall (to 17" at least) and very thin. Would be interesting to document this under either tree species.