Observation 129656: Hericium erinaceus (Bull.) Pers.


This specimen has branches with spines that are 4cm long, fitting the description of Hericium americanum.
I have this specimen dried with branch still attached.
Dried specimen with branch attached.
Dried specimen.

Proposed Names

56% (6)
Recognized by sight: This was not one solid structure as in Hericium erinaceus.
10% (3)
Recognized by sight: Look at the first image. This specimen had branches as described in Hericium americanum and spines that were 4cm long also fitting it’s description, but H. americanum is said to only be found in eastern America.
This may be the first identified on the west coast.
29% (1)
Recognized by sight
1% (2)
Recognized by sight: Structure branched with heads of teeth on the end.

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

= Observer’s choice
= Current consensus


Add Comment
By: Noah Siegel (Noah)
2014-04-25 23:40:38 PDT (-0700)

coralloides was on American Beech, americanum was on Red Oak.

But, probably 95% of the time I find H. americanum it’s on beech, while H. coralloides is on a host of different hardwoods.

Great Photo!
By: crocodilinusdundee
2014-04-25 22:43:24 PDT (-0700)

The trees look different, do you know what kinds?

Side by side trees…
By: Noah Siegel (Noah)
2014-04-25 20:30:46 PDT (-0700)

Hericium americanum on the right, H. coralloides on the left.

I would be inclined to call this observation Hericium erinaceus

The differents is structure.
By: Thomas Laxton (Tao)
2014-04-25 19:41:54 PDT (-0700)

There is actually no way to tell one from another not even microscopically. They only differ in structure. The image on the website your are referring to does not show branches only a semi dried specimen of what is probably H. erinaceus.

In cultivation
By: crocodilinusdundee
2014-04-25 19:14:17 PDT (-0700)

we see them do things we don’t often see in the wild, not necessarily because they are cultivated but because we get to see so many more. There’s an interesting photo here:


It shows a typical erinaceus, and one that looks branched like americanum. They were identified by a “prominent mycologist” as “erinaceus” but someone who returned later found only “americanum.” Were they really two species sharing the same log?

I understand
By: Thomas Laxton (Tao)
2014-04-25 17:48:20 PDT (-0700)

but that image is of one node separated from the hole specimen. Under that image is the same node after drying and the branch is attached. H. erinaceus does not form narrow branches like that.

The fifth photo down
By: crocodilinusdundee
2014-04-25 17:04:40 PDT (-0700)

Looks exactly like cultivated erinaceus. When they grow on smaller substrates they look like that, sometimes with more than one node. The beautiful erinaceus photos from your other observation are on a large tree?

Hericium americanum?
By: Thomas Laxton (Tao)
2013-08-31 17:24:39 PDT (-0700)

This specimen fits the description of H. americanum in all ways but location. Do you think it could have made its way to the west coast, or is that to far fetched of a proposal.

Here is the link to a Key to the 4 Species of Hericium in North America.


By: Phil Yeager (gunchky)
2013-03-01 15:55:27 PST (-0800)

The measurements are in line with the description of this species.

By: Thomas Laxton (Tao)
2013-02-28 19:48:53 PST (-0800)

The spines are 4 to 4.5 cm long max.

By: Phil Yeager (gunchky)
2013-02-28 19:43:46 PST (-0800)

Looks good to me. How long were the spines?

Created: 2013-02-28 19:21:36 PST (-0800)
Last modified: 2019-02-11 09:00:13 PST (-0800)
Viewed: 310 times, last viewed: 2019-02-11 17:53:43 PST (-0800)
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