Observation 199814: Hydnotrya Berk. & Broome
When: 2015-02-23
0 Sequences

This according to www.fs.fed.us/…/planning-docs/sfs-fu-hydnotrya-michaelis-2009-04.doc: “….Among the several North American species of Hydnotrya, H. cerebriformis, H. michaelis, H. tulasnei and H. variiformis can be distinguished from H. cubispora by the presence of a complexly folded or convoluted interior.” Additionally references describe H. tulasnei and H. cerebriformis as often having strong odors; and H. cerebriformis, H. variiformis, H. inordinata, and H. subnix as conifer associates. Habitat for H. cubispora: mixed woods (Smith), sandy soil (Gilkey), and usually terrestrial (Arora) according to Matchmaker.

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Upper fruitbodies emerging from soil, lower specimens disturbed by animals or people
I excavated these to show the interior lobed surface more clearly

Proposed Names

57% (1)
Eye3 Eyes3
Recognized by sight: hypogeous,somewhat round but irregularly shaped hollow fruit body with brownish orange exterior which is not warty or hairy; whitish lobed interior that has a gray blue cast; brittle whitish flesh; found emerging from disturbed sand/gravel substrate under cottonwood trees; mild odor and taste
Used references: MDM by David Arora, p844
29% (1)
Recognized by sight: mild odor, interior hollow and lobed not folded, no conifers in area, growing terrestrially in sandy soil
Used references: MDM by David Arora, pp. 848 and 849 “H. cubispora is a widely distributed, brownish to pinkish-cinnamon, usually terrestrial species with a a more or less hollow (but lobed) interior…” and obs 111816

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Eye3 = Observer’s choice
Eyes3 = Current consensus


Add Comment
Field Guide to North American Truffles
By: Daniel B. Wheeler (Tuberale)
2015-02-27 00:19:12 CST (-0500)

says Hydnotrya cubispora features as “Sporocarps rounded to irregular, much infolded to form large canals and chambers within, pinkish brown to brown. Odor and taste mild.” It also states that the distribution is “Newfoundland and Quebec south to West Virginia and west to Michigan; southern Alaska south to Oregon.” This obs. if confirmed would be considerably outside that known distribution. I can only suggest sending it to Matt Trappe for confirmation. Most of the last 4-5 years worth of my collections to Matt have been neither acknowledged or identified.

It is my understanding
By: Terri Clements/Donna Fulton (pinonbistro)
2015-02-26 16:23:19 CST (-0500)

that many species of Geopora and Hydnotrya are at first closed and buried underground then emerge/erupt at maturity to disperse their spores. In Arora’s key to “Tuberales” on p 844 he distinguishes between the two genera based, in part, on the fact that the exterior surface of Geopora is covered in brown hairs. According to Smith H. cubispora is “somewhat lobed with a single opening to the interior”.


In my opinion, it seems
By: Elsa (pinknailsgirl)
2015-02-26 15:35:39 CST (-0500)

like some sort of Geopora, but even that it’s uncertain. For me Hydnotria is closed, globose to irregular lobed, more flat, but not open like your specimens.

Created: 2015-02-25 17:38:18 CST (-0500)
Last modified: 2017-07-13 16:32:21 CDT (-0400)
Viewed: 148 times, last viewed: 2017-09-21 16:09:39 CDT (-0400)
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