When: 2009-08-23

Collection location: Strouds Run State Park, Athens, Ohio, USA [Click for map]

Who: Dan Molter (shroomydan)

No specimen available

Species Lists


Proposed Names

83% (3)
Recognized by sight: Growing under hardwoods
Used references: Tom Volk’s comment below.

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= Observer’s choice
= Current consensus


Add Comment
The spores also look different, more rounded in scrobiculatum ….
By: Gerhard Koller (Gerhard)
2009-08-26 10:14:10 CDT (-0400)
mostly oak
By: Dan Molter (shroomydan)
2009-08-23 22:23:04 CDT (-0400)

These were growing under mixed hardwoods. Oak leaves and a half eaten acorn can be seen in the photos. There were no pine trees within a hundred yards.

I guess the ecological criterion makes this H. scrobiculatum.

By: Tom Volk (TomVolk)
2009-08-23 22:14:22 CDT (-0400)

Hi Dan. Under what host were these growing? If under hardwoods, this is H. scrobiculatum (which also grows under pines). So far as I know H. concrescens grows only under conifers. From my student Sean Westmoreland’s thesis:

24. Fruiting body 9 cm wide or wider, usually highly concrescent; scrobiculate or colliculose at disc; spores 5-6 × 4-5µm, with prominent, round, pointed tubercles; growing under conifer or hardwoods
H. scrobiculatum

24. Fruiting body smaller, up to 5 (7) cm wide; usually gregarious but with concrescent patches; slightly colliculose or scrobiculate; spores 4-5 × 3-4µm, with worn down tubercles appearing almost smooth but appearing uneven; growing under pines
H. concrescens