Observation 236487: Hydnaceae sensu lato

When: 2016-03-28

Collection location: Snakelum Woods, Coupeville, Island Co., Washington, USA [Click for map]

Who: Rand Workman (Ranmofod)

Specimen available

Growing on the underside of a barkless log (Acer macrophyllum).
The bloom of hyphae and the dark spines caught my eye.
Spines ~7-8mm
Small spores are allantoid, guttulate.

Species Lists


New growth seems to originate from last year’s growth which is hiding in the shadows between the two growths.
Last year’s growth continuing around the log.
The tip of a spine.
Wall of spine.
Wall of spine.
Hyphae w/ clamps, warts

Proposed Names

61% (2)
Recognized by sight
31% (2)
Recognized by sight
31% (2)
Recognized by sight
57% (1)
Recognized by sight: See also Observation 259876
Based on microscopic features

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= Observer’s choice
= Current consensus


Add Comment
By: Rand Workman (Ranmofod)
2016-04-24 14:50:16 CST (+0800)

Thanks for the direction Danny.
Slightly better images confirm that the spores are smooth and fit well with the descriptions of Hydnocristella himantia (“thin-walled, curved apiculus, guttulate”) as do all the other microscopic features.
The description even matches macroscopically it seems, though I haven’t seen any examples that are near as dark or with such elaborate tufts on the tips of the spines.
Just an older specimen?
I will leave the appropriate taxonomic placement to the community to vote on as I am not sure which genus this species belongs to currently.
Hydnocristella or Kavinia

can you get a clearer shot of the spores?
By: Danny Newman (myxomop)
2016-04-14 00:16:56 CST (+0800)

it may be important to note the presence or absence of ornamentation