Observation 45146: Camarophyllus (Fr.) P. Kumm.

When: 2010-05-04

Collection location: Kaipara harbour, Auckland, New Zealand [Click for map]

Who: Michael W (Michael Wallace)

No specimen available



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I agree
By: Irene Andersson (irenea)
2010-05-07 04:20:11 PDT (-0700)

Although I have seen very pale forms of pratensis, this is different from the main form in many ways: the hygrophanity and striate, almost translucent cap margins (best seen in the first picture) which is more typical for species around Camarophyllus virgineus.

Camarophyllus sp.
By: Clive Shirley (myxo)
2010-05-07 02:43:13 PDT (-0700)

For this to be a Camarophyllus pratensis I would have exspected it to be a little more orange with decurnt gills. On the other hand I have seen pale versions as well as one near 150 mm in size which I did not ever recognise untill I loooked at the spores.

Well, with interwoven…
By: Douglas Smith (douglas)
2010-05-06 09:30:31 PDT (-0700)

With the interwoven gill trama, that does seem to point to Camarophyllus. Unless you go weird with something like Marasmius, which also has that. I’ve seen that with M. oreades which also has interwoven gill trama, except it is also dextrinoid in Meltzer’s.

Hymenophoral trama,
By: Michael W (Michael Wallace)
2010-05-06 06:02:40 PDT (-0700)

Yes, the hymenophoral trama is interwoven and the pileipellis is a cutis of irregularly interwoven hyphae, the size of the spores and the size and colour of the fruit bodies just don’t seem to be a match for any of the described species.

Gill trama…
By: Douglas Smith (douglas)
2010-05-06 03:37:35 PDT (-0700)

To be really convinced of Camarophyllus you should check and see if the gill trama is interwoven.

By: Michael W (Michael Wallace)
2010-05-06 02:54:14 PDT (-0700)

It’s definitely a Camarophyllus species, the spores are smooth and ovoid and on average are 5×3µm.
The lamellae curve upwards then run down the stipe a short distance so I would call them arcuate-decurrent, I have looked at all the species described by E. Horak and it doesn’t seem to match any of them.

Not just the size
By: Irene Andersson (irenea)
2010-05-06 02:14:23 PDT (-0700)

The gills in Camarophyllus species are usually described as adnate to short decurrent, but these non-decurrent gills makes it a bit odd too. I have seen that in our pratensis and others, but only occasionally.

Just for comparison: the caps in our pratensis can reach around 12 cm, but they are hardly hygrophanous at all.
Your obs with the strongly hygrophanous cap, looks interesting, like an intermediate between pratensis and the virgineus group.

The C. pratensis var gracilis that is known from New Zealand, seems to be hygrophanous, and I have seen it described with a cap up to 80 mm, but I’m not really confident with that. The one depicted here, could also be another form, but interpreted as pratensis var. gracilis:

By: Michael W (Michael Wallace)
2010-05-05 23:55:38 PDT (-0700)

I’m not sure now, I’ll have a look under the oil emersion objective, you could be right but the largest described species of__Camarophyllus__ here is C. griseorufescens with a pileus diameter of up to 50mm, P. pratensis var gracilis has a pileus diameter of up to 40mm.
The largest specimen of this species I saw was up to 100mm in diameter but usually around 80-90mm.
I’ll update this once I take a closer look at the spores.

By: Irene Andersson (irenea)
2010-05-05 23:41:57 PDT (-0700)

that size make the gills even more spaced than I thought.

My first impression was something around Camarophyllus pratensis, a group with rather small spores – but I don’t think that’s likely if the spores are warted.

By: Michael W (Michael Wallace)
2010-05-05 18:28:37 PDT (-0700)

I thought so to at first but the specimens are much too large for any of the described Hygrocybe species in NZ, also the spores are very small, about 5×3µm and they seem to be finely warted, the basidia are also very small, I’ll have to take a closer look.
The largest specimens I saw had a pileus diameter of up to 100mm with the fruit bodies being up to 120mm tall.

Looks like
By: Irene Andersson (irenea)
2010-05-05 06:01:17 PDT (-0700)

a Hygrocybe (Camarophyllus?) with those widely spaced gills.

Created: 2010-05-04 22:42:10 PDT (-0700)
Last modified: 2010-05-06 02:55:11 PDT (-0700)
Viewed: 164 times, last viewed: 2017-06-07 06:35:20 PDT (-0700)
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