Abortiporus biennis (Bull.) Singer
blushing rosette
Podoscyphaceae
Species account author: Ian Gibson.
Extracted from Matchmaker: Mushrooms of the Pacific Northwest.
Introduction to the Macrofungi
blushing rosette
Podoscyphaceae
Species account author: Ian Gibson.
Extracted from Matchmaker: Mushrooms of the Pacific Northwest.
Introduction to the Macrofungi
Photograph
Species Information
Summary:
Features include 1) a fruitbody that is variable in shape and size, and is bracket-like, or top-shaped or rosette-like with a central or lateral stem, 2) a cap that is whitish to pale brown, 3) flesh with an upper spongy layer and a lower firm layer, 4) light buff pores that are angular to maze-like, 5) a tendency of the fruitbody to turn red-brown when handled or injured, 6) a tendency of the fruitbody to incorporate pieces of plants, and microscopic characters. Abortiporus biennis is unusual in producing chlamydospores on various parts of the fruitbody (for instance the cap and the stem). A distorted form occurs with no apparent orientation of tubes and may appear poroid over the entire surface.
Odor:
unpleasant, fungoid, (Breitenbach)
Taste:
mild (Breitenbach)
Microscopic:
spores 4-6.5 x 3.5-5 microns, broadly elliptic to ovoid, smooth, inamyloid, colorless; basidia 4-spored, 14-17 x 7-7.5 microns, clavate, with basal clamp connection; chlamydospores present in flesh, 5-8.5 microns, nearly round, smooth, colorless; gloeocystidia infrequent to abundant, up to 75 microns long and 7.5-8.5 microns in diameter, highly refractive in Melzer''s reagent, negative in sulfobenzaldehyde, irregular in shape, broadly clavate to cylindric with swellings and constrictions, not incrusted; hyphal system monomitic, generative hyphae with clamp connections, hyphae of upper spongy layer 3-5.5 microns wide, colorless in KOH, "thin-walled, rarely branched", hyphae of lower corky layer "more variable, some thick-walled, with rare clamps, rarely branched", 2.5-4 microns wide, "some thick-walled often branched, with frequent clamps", 2-3 microns wide, "others thin-walled, much branched, with abundant clamps", 2.5-5 microns wide, "tramal hyphae similar to those of lower context", (Gilbertson), spores 4.5-6 x 3.5-4.5 microns, elliptic, smooth, inamyloid, colorless, thin-walled, with droplets; chlamydospores 3-5 x 3-4.5 microns, nearly round, thick-walled, with droplets; gloeocystidia 30-100 x 6-10 microns, cylindric-sinuous to clavate, containing droplets, (Breitenbach)
Spore Deposit:
yellowish (Breitenbach), white (Buczacki)
Notes:
Abortiporus biennis has been found in BC, WA, OR, ON, PQ, AL, AZ, CA, DE, FL, GA, IA, IL, IN, KY, LA, MA, MD, ME, MI, MO, MS, NC, NE, NJ, NY, PA, OH, TN, TX, and WI, (Gilbertson).
Habitat and Range
SIMILAR SPECIES
It differs from similar stemmed polypores in its abundant gloeocystidia and chlamydospores, (Gilbertson). "The presence of both gloeocystidia and chlamydospores distinguishes A. biennis from similar polypores." (Ginns(28) with Latin name italicized)Habitat
typically "on the ground arising from buried roots (perhaps both live and dead roots), also on hardwood and conifer logs, causing a white rot", (Ginns), annual, on numerous hardwood genera, rarely on conifers, often on ground from buried roots; causes white rot of dead hardwoods and white trunkrot of living hardwoods, (Gilbertson), single or in groups, on soil but always associated with buried dead wood, (Breitenbach), summer, fall, (Buczacki)
Status Information
Synonyms
Synonyms and Alternate Names:
Daedalea biennis (Bull.) Fr.
Gelatoporia dichroa (Fr.) Ginns Index Fungorum 6.5 1
Gloeoporus dichrous (Fr.) Bres.
Heteroporus biennis