Observation 137206: Chlorophyllum rachodes (Vittadini) Vellinga

When: 2013-06-21

Collection location: Grassy Butte, North Dakota, USA [Click for map]

Who: Johannes Harnisch (Johann Harnisch)

No specimen available


White spore print.
White spore print.
White spore print.

Proposed Names

-32% (2)
Recognized by sight: looks like it has white gills… so maybe it has white spores too
55% (4)
Recognized by sight: only a spore print will separate the toxic from the edible. base characteristics tell brunneum from rhacodes.

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

Eye3 = Observer’s choice
Eyes3 = Current consensus


Add Comment
Easy mushroom to grow, too.
By: Daniel B. Wheeler (Tuberale)
2013-06-25 14:02:58 PDT (-0700)

Add it to the compost pile for many happy meals in the future. I’ve seen it grow readily in grass clippings, but it also likes branches and twigs, especially from birch. And of course grows easily in mounds of Douglas-fir needles and twigs. Thatcher ants RULE!

yay, a happy resolution!
By: Debbie Viess (amanitarita)
2013-06-25 13:35:23 PDT (-0700)

and I assume your post-dinner evening went well? ;)

Spore print is white
By: Johannes Harnisch (Johann Harnisch)
2013-06-25 12:57:32 PDT (-0700)

Had mushroom gravy for dinner!

Excellent observation and discussion. TY!
By: Jon Shaffer (watchcat)
2013-06-22 15:14:58 PDT (-0700)
C. rhacodes is also the favorite food of thatcher ants.
By: Daniel B. Wheeler (Tuberale)
2013-06-22 12:44:09 PDT (-0700)

Maybe growing on an old, old, ant hill? The mycelium at the base of the stalk would be rather ropey in that case.

Thatcher ants locally build debris mounds 4-5 feet tall here in the PNW.

This obs. is fruiting now. Last year’s obs. was fruiting in October.

check their progress over time.
By: Debbie Viess (amanitarita)
2013-06-22 08:03:16 PDT (-0700)

you could always try a spore print now…if white spores are dropping, its C. brunneum or rhacodes. IF C. molybdites, the spores will stay white for a long time before they color, but won’t drop until they are ready. So, a gill smash mount won’t help you, if you have a scope at home.

Show the entire base in a photo when you go back for more, that way we can get you a better ID.

The two species are almost identical in hand…assume nothing until you see sporedrop.

Non-grass habitat might indicate one of the “edible” species, but not worth vomiting over until you know for sure! And as you are probably aware, even a properly IDed C. brunneum/rhacodes can cause digestive upsets in quite a few folks.

Nice find.

Thanks for all the help
By: Johannes Harnisch (Johann Harnisch)
2013-06-22 06:01:16 PDT (-0700)

Here is last years Ob from same location http://mushroomobserver.org/79956?q=1K8Ve

They are only about an hundred feet from where I am staying for awhile, so I figured that I could keep an eye on them and take a spore print when they are matured. I think they may be too immature to make a spore print right now?
Yet if I wait too long they may be eaten by worms and that would be a shame….
I will try to get a spore print on the biggest one.
@Deb No doubt a green spore print would be cool!

And yes they where found near Grassy Butte however they are growing under Carrigana bushes, in leaf litter and not in an open field.

When all else fails, nice to fall back on MO obs.
By: Daniel B. Wheeler (Tuberale)
2013-06-21 18:36:14 PDT (-0700)

For molybdites, check out 136308, 135773, 133336.

For rhacodes, check 111675, 118073, 110137.

The stipe may also be distinctive. Rhacodes seems to have a stouter stipe, while molybdites has a relatively thin stipe.

I have never seen C. molybdites.
By: Daniel B. Wheeler (Tuberale)
2013-06-21 18:28:48 PDT (-0700)

We apparently don’t have it here in Oregon.

But that doesn’t mean it isn’t found in North Dakota.

That said, this reallly looks more like Macrolepiota. The main feature distinguishing the two is picky: the central cap patch is singular and cracked. In C. molybdites it is more cracked and seldom, if ever, has a central patch.

But I wouldn’t bet my life on it.

C. molybdites
By: Benjamin Dion (benjamindion)
2013-06-21 17:07:20 PDT (-0700)

doesnt really look that that when they young… at least the ones down here in FL.

Also, their gills usually have a green tinge to em even when young.

but then again… I’ve never found Macrolepiota rhacoides

did you save any?
By: Debbie Viess (amanitarita)
2013-06-21 17:04:25 PDT (-0700)

if these came from grass at Grassy Butte, Chlorophyllum molybdites is more likely than rhacodes.

also, check out that beautiful floating ring (nice capture Johann).

looks an awful lot like this one here, second down from left, from Else’s article on shaggy parasols for the BAMS website:


spore prints on these green spored guys are cool, and also make a nice photo.

Spore print, Johann?
By: Daniel B. Wheeler (Tuberale)
2013-06-21 16:36:29 PDT (-0700)

Your specimen could be Macrolepiota rhacoides or Chlorophyllum molybdites.

Macrolepiota rhacoides is edible. Chlorophyllum molybdites accounts for more poisonings than any other fungus, according to Dennis Benjamin in Mushrooms: Poisons and Panaceas.

According to Tom Volk’s website, Chlorophyllum molybdites usually has green or greenish spores and spore print. Macrolepiota has a white spore print. Cases have occured where a single green spore was found amidst a plentora of white spores.

If not positive of identification, throw it away! It probably would not kill you. But the ill-effects are not worth the risk.

Created: 2013-06-21 16:08:42 PDT (-0700)
Last modified: 2013-06-25 13:01:02 PDT (-0700)
Viewed: 116 times, last viewed: 2017-06-16 01:27:34 PDT (-0700)
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