Observation 87039: Hygrophoropsis aurantiaca var. rufa D.A. Reid
When: 2012-01-27
Who: Byrain
No herbarium specimen

Notes: Growing in a dense berry patch under oak and cottonwood, pine, a single spruce, and perhaps some other trees were nearby. These seem to be have colonizing the wood chips present and has yellowish mycelium. Most of the specimens were mostly buried.

Edit (1-30-12):

The spores are smooth and dextrinoid.

Spore range = 6 – 7 × 4 – 4.5 μm
Average spore = 6.53 × 4.1 μm
Average Q = 1.6
20 spores measured from a gill

Proposed Names

-61% (2)
Recognized by sight
75% (1)
Used references: “This very rare variety differs from the type form by more brownish colours on cap and stem and smaller spores. Another variety – atrotomentosa – has still darker colours.” Reid measured at his collection a smaller spore size than the type variety: 5-6 × 3-4 µm. Ludwig measured at his own collection 5,5-7 × 3,5-4 µm. For var. aurantiaca he mentioned 5-7,5(-8) x 2,5-5 µm. Source: Ludwig, E. (2001): Pilzkompendium, Vol.1 – Descriptions. p.191

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

Eye3 = Observer’s choice
Eyes3 = Current consensus


Add Comment
DNA update
By: Byrain
2012-03-23 20:12:49 CST (-0500)

I’m told the DNA for this matched H. aurantiaca.

By: Byrain
2012-01-31 18:02:21 CST (-0500)

I brought some dried specimens to Mike Davis to see if he was interested in doing some DNA on these, he said he will do it, but is not sure when yet. :)

I haven’t seen any DNA work yet
By: Irene Andersson (irenea)
2012-01-31 03:13:24 CST (-0500)

and I don’t know if Tuula Niskanen in Helsinki has planned something..

By: Byrain
2012-01-30 18:43:27 CST (-0500)

According to boletales.com, H. aurantiaca has spores ranging “5–7 × 3.5–4.5 μm” and H. rufa, “Spores 5–7 × 3–4 μm”. This collection has the range 6 – 7 × 4 – 4.5 μm which seems to fit with H. aurantiaca more, so I will go with that for now.

Do either of these species have DNA work done on them yet?

Maybe not H. rufa
By: Darvin DeShazer (darv)
2012-01-28 20:35:55 CST (-0500)

To add to Irene’s consternation, I wonder if H. rufa has been documented in the USA.

A very nice site that one
By: Irene Andersson (irenea)
2012-01-28 12:51:48 CST (-0500)

But I don’t think the genus Hygrophoropsis has been thoroughly investigated yet.. Is rufa merely a colour form with intermediates towards aurantiaca? Is H. olida really synonymous with H. morganii? – these are questions I’d like to have answers to.

H. rufa
By: Byrain
2012-01-28 11:44:34 CST (-0500)

I found a description and some pictures here (http://boletales.com/genera/hygrophoropsis/h-rufa/), it looks closer. Thanks for the corrections.

Created: 2012-01-27 21:19:54 CST (-0500)
Last modified: 2012-03-27 16:49:09 CST (-0500)
Viewed: 293 times, last viewed: 2017-06-10 09:27:53 CDT (-0400)
Show Log