Observation 287971: Baorangia bicolor group

When: 2017-08-23

Collection location: Lake Lure, North Carolina, USA [Click for map]

Who: GP Van Eron (reishiTea)

No specimen available

Notes:
almost no staining on touching any part of mushroom, very slow slight darkening of pore surface after touch, not blue. mixed woods mountain. smell not distinctive

Images

Proposed Names

-45% (2)
Recognized by sight
Used references: bolete specific key guides
62% (3)
Recognized by sight

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Comments

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excellent info!
By: GP Van Eron (reishiTea)
2017-08-24 08:35:58 PDT (-0700)
No problem…
By: I. G. Safonov (IGSafonov)
2017-08-23 21:12:23 PDT (-0700)

These red & yellow boletes are always a big challenge for anyone who wants to ID them. Finding these species, carefully sorting them and building up one’s understanding of species concept (gestalt morphology) through field work, and working with the literature require a lot of time and patience. But even similar-looking species have a certain look about them, not to mention some distinct/unique features that allow for a confident ID more often than not. So eventually anyone who want to pay attention will develop a discerning eye. Roodyi can be readily separated from bicolor by its pink-red or rose-red cap and overwhelmingly yellow stipe and a relatively thick tube layer that doesn’t seamlessly transition into the stipe surface. Bicolor more often than not has little or almost no yellow in the stipe, the rich yellow and razor-thin hymenophore has tiny pores that need to be visualized with a lens when young. Again, these are just general pointers that can help in separating the species on the surface, but having a good understanding/visualization of gestalt macro-morphology is the ultimate Holy Grail one need to pursue.
The bicolor species complex is still very much a puzzle that will require a bit of molecular work to sort out. I think B. pallidoroseus is the closest look-alike of bicolor, but it has a distinct odor of beef/chicken bouillon that no other red & bolete possesses. I am not aware of any published roodyi look-alikes at this time, but I would be surprised at a possibility of finding some new-to-science species floating around in the woods, especially in southeastern USA. :-)

thanks!
By: GP Van Eron (reishiTea)
2017-08-23 20:30:58 PDT (-0700)

thanks for the extra info. the mixed red all the way up the stalk did make it seems strange for b. roodyi . besides the lack of color stain, previous baorangia found had overwhelming odor of cheese. Nothing apparent w this one but could be too young. Any possibility of a 3rd species separate from B. bicolor or B. Roodyi?

Bicolor/Bicolor Group
By: I. G. Safonov (IGSafonov)
2017-08-23 20:13:51 PDT (-0700)

Doesn’t have to bruise blue anywhere. The color scheme of your collection is also consistent with bicolor — read the descriptions of both species. Also, compare with roodyi posts on MO (http://mushroomobserver.org/observer/observation_search?pattern=boletus+roodyi) and particularly with obs 244412 that has been genetically confirmed to be roodyi.

cross section
By: GP Van Eron (reishiTea)
2017-08-23 19:58:21 PDT (-0700)

adding cross section picture as well. Not changing blue when exposed. Totally down for keeping this Baorangia but would love an explanation that counters one of the key identifying feature mentioned in all guides I own.

.
By: GP Van Eron (reishiTea)
2017-08-23 19:44:41 PDT (-0700)

2016 Boletes of Eastern North America “The baorangia bicolor complex is also similar, but it’s flesh slowly stains blue when exposed”

different from others
By: GP Van Eron (reishiTea)
2017-08-23 19:42:44 PDT (-0700)

I first thought b bicolor , but any others found have (sometimes very) slowly stained blue. also smell very distinctive, and taste.