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Boletus frostii


Boletus frostii
Photo Information
Copyright: John Denk (jpdenk) Gold Star Critiquer/Gold Note Writer [C: 267 W: 1 N: 401] (1086)
Genre: Fungi
Medium: Color
Date Taken: 2004-07-31
Categories: Fungi
Camera: Nikon D70, Micro Nikkor AF60mm f2.8
Exposure: f/22, 1/60 seconds
Details: (Fill) Flash: Yes
More Photo Info: [view]
Photo Version: Original Version
Date Submitted: 2008-04-12 12:24
Viewed: 729
Points: 22
[Note Guidelines] Photographer's Note
Boletus frostii, Frost's Bolete, a lovely colorful Bolete, photographed at the Indiana Dunes National Lakeshore, same day as my other recent Indiana photos.

Locally, this species is only found in sandy soils, doesn't seem to like the heavier clay soil that is so common here.

From Michael Kuo's Mushroomexpert.com site:

The sticky red cap of this fairly unmistakable bolete is red--like, the primary color red--rather than the "red" of so many Boletus species that are actually brownish red or rusty red (and so on). Other distinguishing features for Boletus frostii include its red pore surface; its deeply and coarsely reticulate stem; and the fact that its pore surface and flesh bruise promptly blue. Boletus frostii is a mycorrhizal associate with hardwoods--especially oaks--in eastern North America, pockets of the Southwest, Mexico, and Central America.

Boletus frostii is edible, but I do not recommend experimenting with it. Although it is sold in Mexican markets, it apparently affects some people negatively--and beginners might confuse it with several poisonous red-pored species. The safest course for "boletivores" (David Arora's term for fans of edible boletes) is to avoid all red-pored, blue-bruising species.

Description:

Ecology: Mycorrhizal with oaks and other hardwoods; growing alone, scattered, or gregariously; summer and fall; widely distributed in eastern North America, Texas, pockets of the Southwest, Mexico, and Central America.

Cap: 5-15 cm, convex to broadly convex in age; sticky or thinly slimy when fresh; smooth or very finely and shallowly pock-marked; bright red, developing yellowish areas with age.

Pore Surface: Dark to pale red; bruising promptly dark blue; often exuding yellowish droplets when young; 2-3 pores per mm; tubes yellowish to olive, to 15 mm deep.

Stem: 4-12 cm long; up to 3.5 cm thick; more or less equal; coarsely and prominently reticulate over the entire length; red, or occasionally with yellow areas; often bruising blue.

Flesh: Whitish to yellow; bluing when sliced.

Odor and Taste: Not distinctive.

Chemical Reactions: KOH black or grayish, then orangish on cap surface; grayish orange on flesh. Ammonia negative on cap; grayish or yellowish on flesh. Iron salts negative or yellowish on cap and flesh.

Spore Print: Olive brown.

Microscopic Features: Spores 11-15 (-18) x 4-5 µ; smooth; subfusiform. Pileipellis a tangled layer of gelatinized hyphae 3-6 µ wide.

REFERENCES: Russell (in Frost), 1874. (Saccardo, 1891; Coker & Beers, 1943; Singer, 1947; Snell & Dick, 1970; Smith & Thiers, 1971; Smith, Smith & Weber, 1981; Weber & Smith, 1985; Arora, 1986; Phillips, 1991/2005; Lincoff, 1992; Metzler & Metzler, 1992; Both, 1993; Bessette, Roody & Bessette, 2000; Roody, 2003; Miller & Miller, 2006.) Herb. Kuo 08160601.
boreocypriensis, tuslaw, jusninasirun, Maite, Hormon_Manyer, marhowie, nirmalroberts, LordPotty has marked this note useful
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Critiques [Translate]

Hi my beloved friend John,
Another excellent shot of a mushroom which I have not seen before! Superb clarity and wonderfull composition.
TFS.
Greetings from Cyprus,

Bayram

Great image John,
Your DOF is incredible on your images, and especially this one. I'm guessing it's due to your F/22 aperture setting?
I've been experimenting with using higher aperture settings in order to get greater DOF, but I'd like to get a true macro lens to see for sure just how to use them properly.
I was wondering if this particular fungi always has the shaggy looking stem or is it just starting to deteriorate. TFS.
Ron

  • Great 
  • wuta Gold Star Critiquer/Gold Note Writer [C: 871 W: 2 N: 606] (2034)
  • [2008-04-13 10:35]
  • [+]

Hello John , Its a wonderfull Mushroom ,never seen before , great sharpnes colours details pov and dof ,tfs Greetings Teunie .

Hello John. Superb detail with interesting color. Thanks for sharing this image and the useful note. The exposure is perfect and very well done. Regards. Jusni

  • Great 
  • Maite Gold Star Critiquer/Gold Star Workshop Editor/Gold Note Writer [C: 982 W: 64 N: 1200] (4936)
  • [2008-04-18 2:31]
  • [+]

What a fantastic macro of this curious and beautiul mushroom, John! The shot is really superb with such a good sharpness, lighting, DOF and lovely colors. The note is very interesting and complete.
Congratulations and TFS
Greetings
Maite

Hi John,
Very nice capture of the redcap Bolete, perfect POV, sharpness and colors. One of the few flash-fired photos which I find exceptional... Also thanx for the informative note. And of course, for this treasure of the North American mycology (this specie doesn't live in Europe if I'm not wrong).
Congrats, best wishes, László from Hungary

Hi John
A great photo of this red capped mushroom. I certainly wouldn't want to eat it! wonderful detail, colour and composition. TFS
Cheers
Lyndall

Hello John,
Very nice detail and DOF, striking color seen in this bolete.
Excellent information on this,
Thanks!
Howard

Hi John,
It's really dangerous looking sweet little thing. I'm surprised to know that it is edible.
Very nice picture.
Thanks for sharing.
- Nirmal

Hi John,
After seeing your slime molds I just had to look for your other fungi shots.
This one is great too.
The shaggy stem reminds me of a big white boletus that I have been seeing a lot of in our beech forests here. Do you know Austroboletus niveus?
My photo of it isn't brilliant but you get the idea.
Steve

bonjour john
les formes sont un peu bizard pour un bolet mais j'aime bien les couleurs,la netteté est parfaite.
bien vu.
laurent

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