Observation 207539: Lactarius xanthydrorheus Singer
When: 2015-06-23
0 Sequences

Small fleshy mushrooms growing among mosses about 15 feet from lake edge. Mosses growing on rotten hardwood log.

Cap – Largest about 2 cm. Dry.

Spore Print – light creamy white

UPDATE: Looked again at the spore deposit which is heavier. It appears to be creamy white, not beige or tan.

Uploaded spore photos.

Spore Measuresments – TBD

UPDATE 2(6/25): ADDING microscopy images of basidia, etc along gill cut edge ( aquaduct cut slice – small section from center of slice – squashed. )

Microscopy at 400X shows long basidia and sterigma (sterigmae). Basidia approx 27 microns long, Sterigma approx. 6 – 8 microns long.

LACTOSE: Gathered a few more this morning. I observed clear lactose turning to yellow when a cap was split.

SMELL: I smelled nothing for the mature caps and smelled a mild mushroom smell for a crushed over-mature cap.

TASTE: I tasted nothing on any.

HABITAT: I took a few more pictures of the leaves and bark of the trees. There are a number of small maple trees (probably Red Maple) around which there is moss and these mushrooms. All the trees look sick, are covered by lichens. They are all in an area of about 20 feet diameter by a small spring fed pond. There is a lot of sand from the sandy pond when flooding causes the pond to overflow.


Single layer photo – 1000x
1000 x – blended layer image – multi-focus
1000 x – blended layer image – multi-focus
1000 x – blended layer image – multi-focus
1000 x – blended layer image – multi-focus
400 X – gill cut edges – squashed. Shows Basidia and sterigma.
400 X – gill cut edges – squashed. Shows Basidia and sterigma.
Diseased Trees
Diseased Trees
Diseased Trees
Diseased Trees

Proposed Names

28% (1)
Recognized by sight: Reminds me of a miniature L. gerardii… except the tan spore print does not fit.
25% (1)
Recognized by sight

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

Eye3 = Observer’s choice
Eyes3 = Current consensus


Add Comment
MO photo
By: L G Price (LG_Price)
2015-06-25 23:40:46 CEST (+0200)

I tried again. I see no difference. Using an iMac OS 10.3.1. Graphics NVIDIA GeForce GT 640M 512 MB.

MO photo
By: Jimmie Veitch
2015-06-25 23:36:56 CEST (+0200)

view your first pic on “huge” then click the photo for the original. You don’t see the difference?

By: L G Price (LG_Price)
2015-06-25 23:23:53 CEST (+0200)

I looked at the primary photo at all sizes as saw no difference.

Color Management Scheme
Camera – RGB, Color Profile – sRGB IEC61966-2.1
Adobe Lightroom – Exported to jpg at which point the photo is encoded again with RGB – Color Profile – sRGB IEC61966-2.1

Uploaded to MO. What happens after that I have no idea. The best bet is to look at the photo in the original size. MO does not have that option. It seems to resize everything.

Beyond that color rendition depends on your own computer, OS, age of your monitor, color calibration of your monitor, ambient light - ad nauseum.

Color Calibration across the web is very difficult. There are gamat shifts between Macs and other PCs. The best would be if I put a neutral gray card into each photo. Then you could load the photo into photoshop Elements and adjust for the neutral gray.

Of course, your monitor still has to be good and calibrated : )

By: L G Price (LG_Price)
2015-06-25 04:35:12 CEST (+0200)

Thanks for your help. I think I will go back tomorrow morning and see if I can collect a few more. I don’t think I took them all. (The rest are drying.) Try to correct my errors.

and try not to collect anything else.

By: Jimmie Veitch
2015-06-25 04:32:51 CEST (+0200)

1 – nibble and spit. AFAIK it’s safe for all species (even deadlies) and necessary for some ID’s. If it’s not bitter/hot then L. xanthydrorheus is most likely
2 – 100% Lactarius. Check your pics, you can see latex

side note- why does MO alter picture colors? if you look at some “huge” images then click it for the original size the colors change (i.e. first pic)

questions – one answer
By: L G Price (LG_Price)
2015-06-25 02:20:19 CEST (+0200)

1 – I did not taste it. I don’t taste mushrooms unless I have some clue about what they are.

2 – I saw no latex. The Lactarius ID is not mine. I don’t think it is Lactarius.

3 – I have a spore print and will look at spores tonight.

4 – Flesh color. Don’t know. Too dried out now. Issue – tried to collect too many things, I should know better by now. Smell – I don’t know, same issue.

By: Jimmie Veitch
2015-06-25 00:02:53 CEST (+0200)

taste bitter or mild?
latex turning yellow?
flesh white or cream colored?

By: Jacob Kalichman (Pulk)
2015-06-24 18:17:06 CEST (+0200)

Created: 2015-06-24 17:14:24 CEST (+0200)
Last modified: 2015-06-26 01:36:43 CEST (+0200)
Viewed: 111 times, last viewed: 2017-09-19 02:46:49 CEST (+0200)
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