Observation 151920: Hypsizygus ulmarius (Bull.) Redhead

When: 2013-11-12

Collection location: Jasper Co., Missouri, USA [Click for map]

Who: Jon Shaffer (watchcat)

No specimen available

Growing out of a hole in a tree with long stems. Notched gills, not decurrent. No sack/volva that I could see but the stem went way back into the hole and I could not get to the base of them. The mushroom is heavy and has a glossy sheen on the cap. The stipe is strong and solid with a spongy center, could be caused by bugs. None seen though. Temperature is 34F here today. Smell OK, not strong. Seem like oyster mushrooms, just different than I’ve seen with the long stem, the longest of which was about 4 inches. 5% KOH negative on stipe, cap and context.



Proposed Names

28% (1)
Recognized by sight
28% (1)
Recognized by sight
28% (1)
Recognized by sight
74% (3)
Eye3 Eyes3
Recognized by sight: often grows from branch scar sites according to Kuo and is larger and less densely clustered than H.tessulatus, the latter is described as having a marbling pattern on the cap.
Used references: Meyers, R. (2004, July). Hypsizygus ulmarius. Retrieved from the MushroomExpert.Com Web site: http://www.mushroomexpert.com/hypsizygus_ulmarius.html

Please login to propose your own names and vote on existing names.

Eye3 = Observer’s choice
Eyes3 = Current consensus


Add Comment
Both species
By: walt sturgeon (Mycowalt)
2013-11-12 21:23:21 CST (-0600)

are similar in size. H. tessulatus almost always shows “water spots”. In Eastern North America H. tessulatus is by far the most common of the two.

Once upon a time…
By: Dave W (Dave W)
2013-11-12 21:05:29 CST (-0600)

I would have not have thought twice about calling these H. tessulatus. But more recently there seems to have arisen a lack of closure regarding the use of the names “tessulatus” and "ulmarius. See notes under “ulmarius” proposal for Kuo’s explanation.

Holy Mackerel Martin!
By: Jon Shaffer (watchcat)
2013-11-12 20:40:20 CST (-0600)

I wasn’t very close lol. Thank you. Jon

Created: 2013-11-12 17:48:04 CST (-0600)
Last modified: 2013-11-13 09:58:08 CST (-0600)
Viewed: 80 times, last viewed: 2018-04-06 19:17:54 CDT (-0500)
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