Observation 149854: Gymnopilus aeruginosus (Peck) Singer
When: 2013-10-25
No herbarium specimen

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By: Caleb Brown (Caleb Brown)
2013-10-26 13:34:23 CDT (-0400)

Thanks for the details blood, thats great, ill look at them soon!

By: Richard and Danielle Kneal (bloodworm)
2013-10-26 10:37:35 CDT (-0400)

very cool!!

couple thoughts…

1. does that happen to be hemlock by any chance (i’ll get to why in a minute)?

2. G. aeruginosus has a fairly large (lengthy) stipe (5-12cm). the stipe is solid, becoming hollow. they are also regularly connate at the base and equal. the veil is said to be arachnoid and leaving an apical evanescent zone.
the lamellae are said to be “cream-buff” to “pale ochraceous orange.”

3. G. luteofolius also has a fairly large stipe, measuring 3-9cm. the veil is said to be arachnoid, yellowish and forming a fugacious annulus.
i can’t really make out the lamellae edges from the photos, but if you can look at them under the scope or a hand lens and see if they are striate, that would help, too.

4. G. braendlei might be a close match here…
the pileus size looks about right (2.5-5cm). also, the shape (hemispheric becoming convex and slightly umbilicate with purplish colors when young, then pink in the center and pale pink on the margin, finally becoming yellowish (which can easily be confused with G. luteofolius).
the context is white, which we also see apparent here. the stipe is a better match than G. aeruginosus, which is 2.5-4cm long, fibrillose and has a fibrillose veil, but, not said to form an annulus.
the lamellae are also a closer match (whitish, soon bright tawny or indian yellow.

this brings me to my final point…

5. G. pulchrifolius.
the pileus is 2.5-5cm, hemispheric becoming convex and is pink in the center and pallid on the margin. the pileus is fibrillose or squamulose in the center and fibrillose on the margin. the context is white.
the lamellae are adnate and slightly sinuate (which we see here) which become bright tawny or indian yellow.
the stipe is 2.5-4cm, pallid, yellowish at the base and fibrillose at the top.
now, this species was originally collected in ny on decaying hemlock in july and september.
however, i see no reason why it couldn’t fruit in the PNW with the right conditions and wood-type.

in fact, i have reason to believe that this species has been collected in the PNW before:

“A collection in 1992 from wood chips at the volunteer fire station grounds in Sutton Lake, Oregon matched Hesler’s description of G. luteofolius in all respects except (1) greyish green tinges were evident on caps where they had been in contact or where handled; these colors may have been a product of the coloration in the cap context, as seen through a bruised cap; (2) pleurocystidia and caulocystidia not observed, and (3) veil whitish. The spores from this collection bore the same distinctive, random pattern of verruculose ridges indicated by Hesler (1969, fig. 3). The collection is not referrable to any other known species. Additional collections of the species were made by Kit and me same year at Cascade Head, Ore., and by Evers & Sieger at Birch Bay, WA.; latter is in (WA).”

i think that Harley Barnhart is actually referring to G. pulchrifolius here
(which lacks both pleurocystidia and caulocystidia)

“Peck states that this is a beautiful species easily recognized by the pink tint of the pileus, the bitter taste and the peculiar bright colors of its lamellae and spores.”

in regards to the greenish/blue bruising…

“Gymnopilus pulchrifolius is also recorded as having pink to green colors…”


1. G. pulchrifolius lacks pleurocystidia, caulocystidia and pileocystidia.
2. G. braendlei exhibits both pleurocystidia and pileocystidia.
3. G. aeruginosus/luteofolius present with both pleurocystidia and caulocystidia.

i hope you kept them…

i look forward to the micro!!

once again, very cool find!!


Created: 2013-10-26 04:20:41 CDT (-0400)
Last modified: 2014-05-13 14:44:28 CDT (-0400)
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