Albatrellus subrubescens
| Albatrellus subrubescens | |
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| Scientific classification | |
| Kingdom: | Fungi |
| Division: | Basidiomycota |
| Class: | Agaricomycetes |
| Order: | Russulales |
| Family: | Albatrellaceae |
| Genus: | Albatrellus |
| Species: | A. subrubescens |
| Binomial name | |
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Albatrellus subrubescens (Murrill) Pouz. (1972) |
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| Synonyms | |
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| Albatrellus subrubescens | |
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| Mycological characteristics | |
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pores on hymenium |
 
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cap is convex or flat |
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hymenium is decurrent |
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stipe is bare |
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spore print is white |
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ecology is mycorrhizal |
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edibility: poisonous |
cap is convex
Albatrellus subrubescens is a species of polypore fungus in the family Albatrellaceae. The fruit bodies (mushrooms) of the fungus have whitish to pale buff-colored caps that can reach up to 14.5 cm (5.7 in) in diameter, and stems up to 7 cm (2.8 in) long and 2 cm (0.8 in) thick. On the underside of the caps are tiny light yellow to pale greenish-yellow pores, the site of spore production. When the fruit bodies are fresh, the cap and pores stain yellow where exposed, handled, or bruised.
The species is found in Asia, Europe, and North America, where it grows on the ground in deciduous or mixed woods, usually in association with pine trees. It is closely related, and physically similar, to the more common Albatrellus ovinus, from which it may be distinguished macroscopically by differences in the color when bruised, and microscopically by the amyloid (staining bluish-black to black with Melzer's reagent) walls of the spores. The fruit bodies of A. subrubescens contain scutigeral, a bioactive chemical that has antibiotic activity. A. subrubescens mushrooms are mildly poisonous, and consuming them will result in a short-term gastrointestinal illness.
The species was first described as Scutiger subrubescens by American mycologist William Murrill in 1940, based on collections that he found growing under oak near Gainesville, Florida, in November 1938. In 1947 he transferred it to the genus Polyporus.Josiah Lincoln Lowe examined Murrill's type material and thought that it did not differ from Albatrellus confluens. In 1965, Zdeněk Pouzar made collections from Bohemia (now the Czech Republic), and described it as a new species (Albatrellus similis), unaware of the similarity to Murrill's Florida specimens. Further study revealed that A. similis was identical to Murrill's Scutiger subrubescens, and Pouzar transferred the latter epithet to Albatrellus. In 1974, Pouzar recognized that Lowe's species Albatrellus confluens was distinct from A. subrubescens. The specific epithet subrubescens, "tinted reddish", is derived from the Latin words sub ("less than") and rubescens ("growing red").
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