Observation 168456: Lactarius Pers.

Growing on the ground in mixed woods.
Caps up to 2.2 cm across.
Stipe was up to 3 cm long and hollow.
They did have a odor that was not unpleasant(?).
Could not get a decent spore print but they appeared to be whitish.
A few spores were extracted using Melzers and appeared to be weakly amyloid.
The spores were ~ 7 X 6.3 microns with rather thick warts.
Not sure how to classify them.

Species Lists


Spores in Melzers @ 1000X.
Spore in Melzers @ 1000X.
Spore in Congo red & KOH @ 1000X.
Spores in Congo red & KOH @ 1000X.
Basidium in Congo red & KOH @ 1000X.
Sphaerocysts in gill trama @ 1000X.

Proposed Names

11% (8)
Recognized by sight
31% (12)
Recognized by sight
-31% (8)
Recognized by sight
-7% (8)
Recognized by sight
23% (6)
Recognized by sight
-34% (8)
Recognized by sight: just another guess at the identity of this fungus -
-58% (6)
Recognized by sight: Also just another guess at the Genus of this fungus, were the spores really whitish?
-46% (9)
Based on microscopic features: Globose ornamented spores
-11% (8)
Recognized by sight: like pratensis… macroscopically… maybe the spores are from something else if there were only a few found… look around you… just look around you…
mycelium & stipe texture: obs 129540
stipe shape
cap shape
decurrent gills, obv
cap splotches, white band around margin: obs 115762
other similar ones: obs 47090, obs 32767
-9% (8)
Recognized by sight

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

= Observer’s choice
= Current consensus


Add Comment
Those are definitely sphaerocysts
By: Christian (Christian Schwarz)
2014-07-18 19:58:01 MDT (-0600)

which narrows identification possibilities quite a bit

Added some photos of what I could
By: Ron Pastorino (Ronpast)
2014-07-18 19:48:06 MDT (-0600)

see from a piece of the gill.
David Lewis of the Gulf States MS thought they could be Lactarius and suggested looking for sphaerocysts in the gill trama which might reinforce the Lactarius side.
Only saw a few spores and they did appear to be globose and warted.
Sphaerocysts did appear to be present but I have little experience in looking for them.

By: Jacob Kalichman (Pulk)
2014-07-18 09:48:54 MDT (-0600)


When I get a little time
By: Ron Pastorino (Ronpast)
2014-07-18 08:59:03 MDT (-0600)

I’ll try to work on these a bit more.
They did not have the feel of a Lactarius but I was processing a lot of mushrooms and wasn’t overly attentive before I dried them. Did not actually see any liquid exude and I don’t thick they were very brittle.

By: Rocky Houghtby
2014-07-17 13:49:12 MDT (-0600)

The color of the spore ornamentation cannot be seen clearly because the specimen is actually mounted in the iodine solution as opposed to being mounted in H2O after allowing the reaction to occur- everything looks iodine colored. It may be that only the spore ornamentation is reacting to the Melzers and we cannot see it.

Subglobose, Ornamented Spores …
By: Stephen (Ιερονυμοσ)
2014-07-17 13:42:30 MDT (-0600)

Members of Russulaceae have such spore morphologies. How does the stipe break? If it is brtille, crumbly, and breaks cleanly, Russulaceae sounds like a good bet.

Did the gills exude latex?
EDIT: If Melzer’s is supposed to be anyting like using Lugol’s iodine this doesnt look like staining.

Inamyloid methinks.

By: Richard Kneal (bloodworm)
2014-07-17 07:37:37 MDT (-0600)
If somebody is in Mexico
By: Ron Pastorino (Ronpast)
2014-07-16 22:25:05 MDT (-0600)

please check up on Alan….I think he may have gone too far in one of his mushroom edibility experiments.

These don’t look like
By: Christian (Christian Schwarz)
2014-07-07 21:19:00 MDT (-0600)

Gloeocantharellus spores, I think that can be ruled out.

Gleocantharellus sounds interesting..
By: Ron Pastorino (Ronpast)
2014-07-07 21:01:13 MDT (-0600)

Not much info on the web ..
What separates them from Cantharellus?

I feel like I’m in the middle of a
By: Ron Pastorino (Ronpast)
2014-07-06 21:22:36 MDT (-0600)

fast paced Ping-Pong game. Incredible number of name changes.
Pure Melzers was used to wash a portion of a gill and since the colors of the warts look weakly or barely darkened, I was hesitant say it was a positive reaction.
I don’t recall much about the texture, etc. They were small and I didn’t really play with them much and they are of course even smaller after drying.
I won’t be able to do anything with them for about a week. I’m open to suggestions that might definitively narrow down the genus possibilities but if someone is really interested, I’d be happy to ship the collection to them.

Good point, Brian.
By: Rocky Houghtby
2014-07-06 20:57:48 MDT (-0600)

Although, I am having trouble judging the quality of the reaction; it looks like the mount didn’t get washed?

Cap context
By: Danny Newman (myxomop)
2014-07-06 20:43:09 MDT (-0600)

Of the largest fruiting body looks Russulaceae-like, as though full of sphaerocysts. Ron, do you remember tissues breaking cleanly or crumbling?

Dubious Melzer’s reaction
By: Brian Looney (GibbiPicasso)
2014-07-06 20:22:34 MDT (-0600)

As far as I know, there are no members of the Russulaceae with a weak amyloid reaction. If the spores are mounted in pure Melzer’s reagent, then it is unlikely that this is Russulaceae.

2’nd photo…
By: Richard Kneal (bloodworm)
2014-07-06 20:07:19 MDT (-0600)

if you zoom in all the way you can definitely see latex coming from the gills…

I’m not
By: Rocky Houghtby
2014-07-06 19:40:53 MDT (-0600)
By: Richard Kneal (bloodworm)
2014-07-06 19:31:44 MDT (-0600)

how are you differentiating Lactarius spores from Russula spores??

By: Rocky Houghtby
2014-07-06 19:15:44 MDT (-0600)

look fine for Lactarius to me. Any chance you can look for macrocystidia or lactifers?

There does seem to be a lot of staining going on
By: Ron Pastorino (Ronpast)
2014-06-26 18:25:16 MDT (-0600)

with these, both from handling and just generally although I didn’t see it happening in real time.
They were quite small, with very short deccurent gills and the spores don’t look like typical Lactarius spores but I guess that doesn’t exclude the possibility.

spore print aside
By: Danny Newman (myxomop)
2014-06-26 18:23:22 MDT (-0600)

micro certainly favors your proposal, Jimmie.

By: Jimmie Veitch
2014-06-26 18:08:59 MDT (-0600)
spore print?
By: Danny Newman (myxomop)
2014-06-26 17:53:49 MDT (-0600)

i see what might be a light deposit of rusty brown near some of the gills.

Created: 2014-06-26 17:43:07 MDT (-0600)
Last modified: 2014-07-18 22:38:34 MDT (-0600)
Viewed: 688 times, last viewed: 2019-08-30 10:10:59 MDT (-0600)
Show Log