Hortiboletus flavorubellus

Bright yellow cap flesh slowly stains bluish-green, while stem flesh stains blue/green on top & orange by the base. Very deep xerocomoid yellow pores stain blue/green.

SKU: Boletus rubellus Categories: 1. Found in Alabama, 1. Found in Connecticut, 1. Found in Northern Illinois, 2. Found in Florida, 2. Found in Kansas, 2. Found in New Jersey, 3. Found in Michigan, 3. Found on Long Island (New York), 4. Found in Mississippi, 4. Found in Ohio, 4. Found in Pennsylvania, 4a. Found in S.W. Pennsylvania, 5. Found in North Carolina, 5. Found in Ontario, 6. Found in Eastern Texas, 6. Found in Quebec, CAP COLOR FILTERS, CAP FLESH COLOR FILTERS, Cap Flesh Does Not Stain with 30 seconds, Cap Flesh is Yellow, CAP FLESH STAINING FILTERS, Cap Flesh Stains a Color Other than Blue, Cap Flesh Stains Blue, CAP SIZE FILTERS, CAP TASTE FILTERS, CAP TEXTURE FILTERS, Cap Texture is: 1- Dry & Smooth (Normal), Cap Texture is: 4- Cracked Beyond Environmental Effects, Deciduous (Leafy) Trees, Edibility: 4- Good, FILTER SET #1: REGION, FILTER SET #2: CAP FEATURES, FILTER SET #3: PORE FEATURES, FILTER SET #4: STEM FEATURES, FILTER SET #5: CAP FLESH (CONTEXT) FEATURES, FILTER SET #6: SPORE PRINT, FILTER SET #7: HABITAT FILTERS, FILTER SET #8: EDIBILITY, My Mushroom is Mature & Its Pores are Tiny, My Mushroom's Cap is >0.1" Across, PORE COLOR FILTERS, PORE SIZE FILTERS, PORE STAINING FILTERS, Pores Stain Blue, Pores Stain Other than Blue, Primary Cap Color is: 3- Red, Pink, Purple, or Orange, Primary Cap Color is: 4- Some Shade of Brown, Primary Pore Color is: 2 - Yellow to Gold, Primary Pore Color is: 4 - Some Shade of Brown, Primary Stem Color is: 2- Yellow to Orange, Primary Stem Color is: 3- Red, Pink, Purple, or Orange, Spore Print is 1- Olive to Olive-Brown, Spore Print is 4- Plain Old Brown, STEM COLOR FILTERS, STEM DECORATION/ TEXTURE FILTERS, Stem Is Thin & Stringy, STEM SIZE FILTERS, Stem: 1- Has No Significant Ornaments, Stem: 7- Is Notably Dotted and/or Spotted, ZONE 1- the NORTHEAST, ZONE 2- the MIDWEST, ZONE 4 - the SOUTHWEST, ZONE 5 - the SOUTH

Description
Discussions(2)

Description

Names (plural) in North American Boletes: Boletus fraternus AND Boletus rubellus

Genus: Hortiboletus

Genus 2: Boletus
Genus 3: Xercomus

Species: flavorubellus

Species 2: rubellus
Species 2: fraternus

Common Name:

Tells: Bright yellow cap flesh slowly stains bluish-green, while stem flesh stains blue/green on top & orange by the base. Very deep yellow xerocomoid pores stain blue/green.

Other Information: Small (<2″) dark red cap fades to brick-red & often cracks w/age. Often-long yellow stem often has vertical lines (striations) at the top; darkens from orange-red spots going down; & turns brown where handled. Hard to distinguish from Hortib. campestris (Field Bolete). The main distinction is that rubellus’ cap cracks even more, and campestris has pure yellow stem flesh (not orange by the base) and lacks the striations at the stem’s apex. Likes grassy areas near oak & beech.

Science Notes: DNA testing merged B. fraternus into B. rubellus, moved the combination to a new genus called Hortiboletus, and has now clarified that rubellus is a European species, and we in North America have a new critter called H. flavorubellus. Subsequent work also shows that Hortiboletus is a sister genus to Xerocomellus if you want to be geeky, which makes sense because the pores are so noticeably twisted and xerocomoid.

Edibility: Good. (B. rubellus was listed as “unknown” in the field guides, but B. fraternus was known to be a good edible).

CHEMICAL TESTS:

NH4OH (Ammonia): No data.
KOH: Cap flesh turns dull orange.
FeSO4 (Iron Salts): Cap flesh turns olive-green.

Links:

National Audubon Society Field guide to Mushrooms, Gary Lincoff

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Mushrooms of West Virginia and the Central Appalachians

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North American Boletes

113 (fraternus)

152 (rubellus)

225

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Rain

1 year 28 days ago

Can you eat this mushroom ?

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admin

1 year 24 days ago

Edibility: Good. (B. rubellus was listed as “unknown” in the field guides, but B. fraternus, the merged name, was known to be a good edible).

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