Observation 214837: Leccinellum crocipodium (Letell.) Della Maggiora & Trassinelli

In grasses, under oak.

UPDATE: August 31. Went back to same spot and gathered 3 more specimens. Two to add to the collection and one to test and get a better spore print. See last image.

Chemical Tests: Split specimen and tested context of stipe, gills, cap flesh and pileus.

KOH: immediate flash to bright, deep golden orange on stem, gills and cap flesh. On cap I saw yellowing, but dark color of cap obscured any color change.

Ammonia: slow, slight yellowing of stipe, gills and cap flesh.

Although I can’t seem to get a spore print, the spore on the tubes, shown in the photos for the mature specimen show that the spore is dark brown.

However, I took a single pore, prepared a squash mount of the tip and looked the spores on the tube surface, floating free from the surface and also, cystidia at the tip of the pore. The mount is in KOH and all turned a golden orange color. The gobular contents of basidia appear to be green from the KOH.

The longest cystydia is about 25 microns long. See photo.

Spore Measurements
| N | Length | Width |Q ratio|
| 1 | 12.1 | 5.1 | 2.38|
| 2 | 14.9 | 5.8 | 2.56|
| 3 | 12.8 | 5.5 | 2.34|
| 4 | 14.7 | 5.5 | 2.66|
|5 | 14.1 | 4.5 | 3.11|
|6 | 13.6 | 5.0 | 2.72|
|7 | 13.9 | 5.1 | 2.72|
|8 | 13.6 | 5.4 | 2.52|
|9 | 16.0 | 5.4 | 2.96|
|10 | 15.8 | 6.3 | 2.51|
AVE | 14.2 |5.4 | 2.65|


Specimens left and center added to collection Aug 31
1000x – cystidia at the pore tip, in 10% KOH
Longest cystidia is 25 microns long.
1000x – cystidia at the pore tip, in 10% KOH
1000 X – mature spore in 10% KOH
1000X – tube surface – 10%KOH – immature and mature spore – basidia filled with green gobular material.

Proposed Names

28% (1)
Recognized by sight
-16% (2)
Based on chemical features: KOH reaction matches, “Boletes of NA”

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

Eye3 = Observer’s choice
Eyes3 = Current consensus


Add Comment
By: L G Price (LG_Price)
2015-11-14 01:28:31 CET (+0100)

I can’t find your address. Please send again.

I’ll try to get to this on Sunday.

I take it the Suillus cothurnatus (222740) is not of interest. ( thanks for the ID )

Do I have a cut off date? Helps me to stay focused!

Hello, LG
By: I. G. Safonov (IGSafonov)
2015-11-13 02:20:42 CET (+0100)

No, it’s not too late. I haven’t sent my Leccinum collection to M. Kuo yet, so I can certainly add your sample to my shipment. Please spare as much of your collection as possible. Thanks for all the notes you included in this obs. Kuo requires a submission form for samples (http://www.mushroomexpert.com/studies_leccinoid_form.html), so please review it to make sure that nothing is missing from your notes. I will fill it out myself. You have my mailing address, right? Thanks!


Sending Samples
By: L G Price (LG_Price)
2015-11-12 22:59:42 CET (+0100)


Is it too late to send samples? I waited because I thought I might find some more, but then the area went into a prolonged drought.

Today I found a Suillus species that might also be of interest.

By: L G Price (LG_Price)
2015-09-02 04:53:12 CEST (+0200)

As shown in the photos, I saw no staining on cutting these specimens.

I have several, I wouldn’t mind sending a couple of samples.

THanks for the links.

By: I. G. Safonov (IGSafonov)
2015-09-02 01:27:26 CEST (+0200)

> If the exposed context of this interesting material didn’t stain pinkish or reddish, this may not be either L. crodipodium or L. rugosiceps.
> Besides, the former is a European taxon (in the sense of Watling) whose existence in the USA is dubious according to M. Kuo:
http://www.mushroomexpert.com/leccinum_uncertain.html and scroll down.
> For an accurate description of L. crodipodium see:
M.E. Noordeloos has done a lot of taxonomic/molecular research on the Old World Leccinum in the 2000’s.
> M. Kuo is currently doing research on the Leccinoid Fungi of North America:
He will be visiting NJMA (the mushroom club I belong to) in October. So, if you are willing to part with a portion of your collection and mail it me, I will be able to pass it onto him. He will be getting plenty of samples from Dave W and myself. Please can contact me via MO.

Added Spore Measurements and Photos
By: L G Price (LG_Price)
2015-09-01 23:12:00 CEST (+0200)

Created: 2015-08-31 03:23:01 CEST (+0200)
Last modified: 2015-09-02 01:53:12 CEST (+0200)
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