Observation 116876: Lactarius xanthogalactus Peck

When: 2012-11-13

Collection location: Hillsboro, Washington Co., Oregon, USA [Click for map]

Who: Sava Krstic (sava)

Specimen available

Intel Jones Farm campus; growing in lawn, under planted oak.

Odor indistinctive, taste somewhat bitter. Milk white quickly changing to yellow, stays yellow, stains tissue yellow.

Proposed Names

28% (1)
Used references: Key to species of LACTARIUS in the Pacific Northwest (Key to species of LACTARIUS in the Pacific Northwest)

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

Eye3 = Observer’s choice
Eyes3 = Current consensus


Add Comment
No info on spore size yet
By: Sava Krstic (sava)
2012-11-19 01:54:34 CST (-0500)

Irene, thank you very much for helping get a correct ID here. Unfortunately, I didn’t take a spore print and didn’t do any microscopy. But the mushrooms are preserved and I’ll take a look when I get a chance. (Am “a bit overwhelmed” now.)

I’m not sure either
By: Irene Andersson (irenea)
2012-11-16 06:48:30 CST (-0500)

and can’t rule out the possibility that you may have both in Oregon..

Have you been able to look closely at the spores (I know it’s not easy..)?
The descriptions I have seen of xanthogalactus by Peck, but also Hesler&Smith say 7-8 µm, globose (in H&S’s theory a synonym to chrysorrheus); in MycoWeb 7-8 × 6-6.5 µm, subglobose to broadly ellipsoid, partially reticulate.
In Funga Nordica for chrysorrheus: 5.5-9 × 5-7, broadly ellipsoid, 1 µm high spines with an incomplete reticulum formed by ridges between the spines.

Not sure at all
By: Sava Krstic (sava)
2012-11-16 03:29:30 CST (-0500)

Irene, thanks for the question. It made me read a little (http://en.wikipedia.org/wiki/Lactarius_vinaceorufescens, http://www.mykoweb.com/...) and L. xanthogalactus might be a better match, mainly because it seems that L. chrysorrheus is known to occur only in the eastern part of the US. But I really don’t see what are the characters that clearly distinguish the two species.

This is the first time I’ve found this mushroom and it was easy to ID it with the Key Council key—-because it does not mention L. xanthogalactus.

I’m curious
By: Irene Andersson (irenea)
2012-11-15 05:36:41 CST (-0500)

to know if you can tell chrysorrheus apart from xanthogalactus?

Created: 2012-11-15 03:40:20 CST (-0500)
Last modified: 2012-11-16 03:30:42 CST (-0500)
Viewed: 101 times, last viewed: 2017-06-14 10:59:56 CDT (-0400)
Show Log