Collection location: Memorial Park, Middletown, Pennsylvania, USA [Click for map]
Thanks to my friends at Northeast Mushrooms (a Yahoo group), especially Noah Siegel, I am confident of the identification. Here are my observations:
Habitat: Found on mainly oak leaf litter in a mixed hardwood forest, about 50 yards up a slope from a small creek. The largest nearby tree is a red oak. There are also beeches, tulips and two very young maples in the immediate vicinity. No conifers.
Size of patch: The entire patch extends about 15 feet from the red oak and is about 12 feet at its widest.
Clustering: In the patch there are several somewhat round fused clusters, several arcs of singles and doubles, and several random groupings.
Size of clusters/caps: The largest, nicely shaped cluster was about 10 inches across. One of its caps was nearly 6 inches in diameter. The single caps and easily separated doubles were from 2½ to 3½ inches.
Cap grooves and ridges: Closeup photos show the grooves and ridges in the caps, which is apparent on all caps throughout the patch. Older caps, though still ridged, appear slightly flatter. On a dry day, the white margin has a peach-fuzz effect.
Teeth: I was not able to see the teeth with the naked eye. From my enlarged macro photo, I estimate that the individual teeth are about 1/3 mm in diameter. They are sparser towards the margin and denser towards the stem. A cross-section shows the teeth shorten considerably towards the margin.
Stipe: The stipe is firm, but somewhat pliable, but the base is very rigid. When I cross-sectioned the mushroom, the base broke away from the pliable stem under the pressure of the knife. The base felt woody and appears to have roots coming from it.
Taste: Nothing significant noted.
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|I’d Call It That||3.0||8.55||2||(Noah)|
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you posted it a few weeks ago on MO
I wrote to Sean and he looked and told me I posted an old copy of the key. d’oh!!
Your key is correct. Where did you get that? thanks
What about this?
“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
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
Hi Fran. Thanks for your thorough analysis. This dichotomy from my grad student Sean Westmoreland’s thesis on Hydnellum may help:
15. Fruiting body up to 9.0 cm wide, usually highly concrescent, context up to X cm thick, scrobiculate or colliculose at disc but may be slightly ornamented, spores 5-6 um X 4-5 um, with prominent tubercles………..……H. concrescens
15. Fruiting body smaller, up to 7.0 cm wide, with thinner context, usually gregarious but with concrescent patches scattered, slightly colliculose or scrobiculate, spores 4-5 um X 3-4 um, with worn down tubercles appearing almost smooth but uneven.. ……………………………………………………………H. scrobiculatum
Judging from the size, this may be H. concrescens.
Created: 2009-09-15 02:22:11 BST (+0100)
Last modified: 2009-09-15 02:22:11 BST (+0100)
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