Synonyms: Abortiporus distortus, Agaricus coriaceus, Bjerkandera puberula, Boletus biennis, Boletus distortus, Boletus rugosus, Ceriomyces alveolatus, Ceriomyces schnyderianus, Ceriomyces terrestris, Cladomeris rugosa, Daedalea biennis, Daedalea bonariensis, Daedalea capitata, Daedalea distorta, Daedalea heteropora, Daedalea incarnatoalbida, Daedalea pampeana, Daedalea polymorpha, Daedalea puberula, Daedalea rufescens, Daedalea sericella, Daedalea sowerbei, Grifola biennis, Heteroporus biennis, Heteroporus distortus, Hydnum bienne, Hydnum rufescens, Irpex hydniformis, Irpex radicatus, Irpicium ulmicola, Lentinus bostonensis, Lentinus hispidosus, Lentinus lusitanicus, Merisma heteroporum, Phaeolus biennis, Pocillaria coriacea, Polyporus biennis, Polyporus distortus, Polyporus heteroporus, Polyporus occultus, Polyporus proteiporus, Polyporus rufescens, Polyporus sericellus, Polystictus rufescens, Ptychogaster alveolatus, Ptychogaster lindtneri, Ptychogaster rufescens, Sistotrema bienne, Sistotrema lobatum, Sistotrema rufescens, Sporotrichopsis terrestris, Striglia puberula, Trametes rufescens, Xylodon radicatus.
Common name: blushing rosette.
Abortiporus biennis is a species of bracket fungus that grows on deciduous trees, particularly oak and elm. In East and Central Texas, it has been found to fruit in the spring and fall, typically on dead or dying branches. The fungus produces semicircular to kidney-shaped brackets with a smooth, velvety upper surface and a pore surface that is white to cream-colored. It is considered a relatively rare species in the region, but can be locally common in areas with abundant host trees. Specimens from East and Central Texas typically range in size from 2-10 cm wide and have a stalk that is short to nearly absent.
Blushing rosette polyporale fungus (Abortiporus biennis)(?) on wood debris on Kiwanis Nature Trail. College Station, Texas, November 17, 2017
Blushing rosette polyporale mushrooms (Abortiporus biennis) on Iron Bridge Trail in Lick Creek Park. College Station, Texas, April 18, 2018
Water drops, or guttation of a young blushing rosette polyporale fungus (Abortiporus biennis) on Iron Bridge Trail in Lick Creek Park. College Station, Texas, April 18, 2018
Young blushing rosette polyporale mushroom (Abortiporus biennis) in Lick Creek Park. College Station, Texas, April 30, 2018
Blushing rosette polyporale mushrooms (Abortiporus biennis) emerging from tree roots(?) in Lick Creek Park. College Station, Texas, April 30, 2018
Blushing rosette polyporale mushroom (Abortiporus biennis) in Lick Creek Park. College Station, Texas, June 4, 2018
Polypore mushrooms Abortiporus biennis on a tree root in Lick Creek Park. College Station, Texas, September 18, 2018
Guttation of polypore mushrooms Abortiporus biennis on a tree root in Lick Creek Park. College Station, Texas, September 18, 2018
Blushing rosette polyporale mushrooms (Abortiporus biennis)(?) on rotting wood in Lick Creek Park. College Station, Texas, June 6, 2019
Close up of blushing rosette polyporale mushrooms (Abortiporus biennis)(?) on rotting wood in Lick Creek Park. College Station, Texas, June 6, 2019
Polypore mushrooms Abortiporus biennis on a log in deep shade in Lick Creek Park. College Station, Texas, June 28, 2019
Polypore mushrooms Abortiporus biennis on rotting oak wood in deep shade in Lick Creek Park. College Station, Texas, June 28, 2019
Pore surface of mushrooms Abortiporus biennis on a log in Lick Creek Park. College Station, Texas, June 28, 2019
Blushing rosette polyporale fungus (Abortiporus biennis) on a fallen branch on Winters Bayou Trail in Sam Houston National Forest. Cleveland, Texas, September 28, 2019
Polypore mushrooms Abortiporus biennis in a wet area on Caney Creek Trail (Little Lake Creek Loop Trail) in Sam Houston National Forest north from Montgomery. Texas, October 26, 2019
Polypore mushrooms Abortiporus biennis growing on tree roots in a wet area on Caney Creek Trail (Little Lake Creek Loop Trail) in Sam Houston National Forest north from Montgomery. Texas, October 26, 2019
Polypore mushrooms Abortiporus biennis on Caney Creek Trail (Little Lake Creek Loop Trail) in Sam Houston National Forest north from Montgomery. Texas, October 26, 2019
Close up of a polypore mushroom Abortiporus biennis in a wet area on Caney Creek Trail (Little Lake Creek Loop Trail) in Sam Houston National Forest north from Montgomery. Texas, October 26, 2019
Polypore mushroom Abortiporus biennis(?) with water drops on a tree branch taken from sandy bottom of a shallow creek on Caney Creek Trail (Little Lake Creek Loop Trail) in Sam Houston National Forest north from Montgomery. Texas, April 18, 2020
Guttation of a polypore mushroom Abortiporus biennis(?) on a tree branch taken from sandy bottom of a shallow creek on Caney Creek Trail (Little Lake Creek Loop Trail) in Sam Houston National Forest north from Montgomery. Texas, April 18, 2020
Reddening surface of a polypore mushroom Abortiporus biennis(?) on a tree branch taken from sandy bottom of a shallow creek on Caney Creek Trail (Little Lake Creek Loop Trail) in Sam Houston National Forest north from Montgomery. Texas, April 18, 2020
Texture of polypore mushroom Abortiporus biennis(?) on a tree branch taken from sandy bottom of a shallow creek on Caney Creek Trail (Little Lake Creek Loop Trail) in Sam Houston National Forest north from Montgomery. Texas, April 18, 2020
Close-up of polypore mushroom Abortiporus biennis(?) on a tree branch taken from sandy bottom of a shallow creek on Caney Creek Trail (Little Lake Creek Loop Trail) in Sam Houston National Forest north from Montgomery. Texas, April 18, 2020
Pattern of dried water drops on a polypore mushroom Abortiporus biennis(?) on a tree branch taken from sandy bottom of a shallow creek on Caney Creek Trail (Little Lake Creek Loop Trail) in Sam Houston National Forest north from Montgomery. Texas, April 18, 2020
Reddish surface of polypore mushroom Abortiporus biennis(?) on a tree branch taken from sandy bottom of a shallow creek on Caney Creek Trail (Little Lake Creek Loop Trail) in Sam Houston National Forest north from Montgomery. Texas, April 18, 2020
Pattern of polypore mushroom Abortiporus biennis(?) on a tree branch taken from sandy bottom of a shallow creek on Caney Creek Trail (Little Lake Creek Loop Trail) in Sam Houston National Forest north from Montgomery. Texas, April 18, 2020
Dissected polypore mushroom Abortiporus biennis(?) on a tree branch taken from sandy bottom of a shallow creek on Caney Creek Trail (Little Lake Creek Loop Trail) in Sam Houston National Forest north from Montgomery. Texas, April 18, 2020
Polypore mushroom Abortiporus biennis(?) that is easily detached from wood, with brown and leathery underside, on Caney Creek Trail (Little Lake Creek Loop Trail) in Sam Houston National Forest north from Montgomery. Texas, April 18, 2020
Blushing rosette polypore mushroom (Abortiporus biennis) on a corner of OSB board (pressed wood chips) in a dried pool on a sany path in Lick Creek Park. College Station, Texas, September 15, 2020
Underside of blushing rosette polypore mushroom (Abortiporus biennis) on a corner of OSB board (pressed wood chips) in a dried pool on a sany path in Lick Creek Park. College Station, Texas, September 15, 2020
Upper view of blushing rosette polypore mushroom (Abortiporus biennis) on a corner of OSB board (pressed wood chips) in a dried pool on a sany path in Lick Creek Park. College Station, Texas, September 15, 2020
Cross section of blushing rosette polypore mushroom (Abortiporus biennis) in Lick Creek Park. College Station, Texas, September 15, 2020
Texture of cross section of blushing rosette polypore mushroom (Abortiporus biennis) in Lick Creek Park. College Station, Texas, September 15, 2020
Red droplets (guttation) on a polypore mushroom Blushing rosette (Abortiporus biennis) on a fallen sweetgum on Winters Bayou Trail in Sam Houston National Forest. Cleveland, Texas, September 18, 2021
Blushing rosette mushroom (Abortiporus biennis) on South Wilderness Loop Trail at Little Lake Creek Wilderness in Sam Houston National Forest near Richards. Texas, October 23, 2021
Top view of blushing rosette mushroom (Abortiporus biennis) on South Wilderness Loop Trail at Little Lake Creek Wilderness in Sam Houston National Forest near Richards. Texas, October 23, 2021
Cross section of blushing rosette mushroom (Abortiporus biennis) on South Wilderness Loop Trail at Little Lake Creek Wilderness in Sam Houston National Forest near Richards. Texas, October 23, 2021
Blushing rosette mushrooms (Abortiporus biennis) on a low stump on a recently cleaned roadside in Lick Creek Park. College Station, Texas, November 15, 2021
Irregular caps of blushing rosette mushrooms (Abortiporus biennis) on a low stump on a recently cleaned roadside in Lick Creek Park. College Station, Texas, November 15, 2021
Close-up of pores of blushing rosette mushrooms (Abortiporus biennis) on a low stump on a recently cleaned roadside in Lick Creek Park. College Station, Texas, November 15, 2021
Underside of polypore mushroom Abortiporus biennis(?) on a fallen branch in Lick Creek Park. College Station, Texas, September 1, 2022
Caps of polypore mushroom Abortiporus biennis(?) in Lick Creek Park. College Station, Texas, September 1, 2022
Spores of polypore mushroom Abortiporus biennis(?) (or may be A. albida from 8/28/2022 ??) from a fallen oak branch under a microscope with x40 objective (spore print whitish, may be light brown) collected in Lick Creek Park. College Station, Texas, September 1, 2022
Spores of polypore mushroom Abortiporus biennis(?) from a fallen oak branch under a microscope with x100 objective collected in Lick Creek Park. College Station, Texas, September 1, 2022
Polypore mushrooms Abortiporus biennis on oak tree roots in Lick Creek Park. College Station, Texas, September 20, 2022
Close-up of malformed polypore mushroom Abortiporus biennis on oak tree roots in Lick Creek Park. College Station, Texas, September 20, 2022
Spores of polypore mushroom Abortiporus biennis, collected a day before in Lick Creek Park. College Station, Texas, September 21, 2022
Blushing rosette mushrooms (Abortiporus biennis) on a tree root in Lick Creek Park. College Station, Texas, November 1, 2022
Spores of blushing rosette mushrooms (Abortiporus biennis) collected 2 days before in Lick Creek Park. College Station, Texas, November 3, 2022
Soft fleshy amorphous polypore mushroom Abortiporus biennis(?) both in natural light and under 365 nm ultraviolet (UV-A) blacklight, found on rotting pine wood before the lake on Sand Branch Loop Trail in Sam Houston National Forest near Montgomery. Texas, September 6, 2025
Side view of soft fleshy amorphous polypore mushroom Abortiporus biennis(?), found on rotting pine wood before the lake on Sand Branch Loop Trail in Sam Houston National Forest near Montgomery. Texas, September 6, 2025
Section of soft fleshy amorphous polypore mushroom Abortiporus biennis(?), found on rotting pine wood before the lake on Sand Branch Loop Trail in Sam Houston National Forest near Montgomery. Texas, September 6, 2025
Spores of soft fleshy amorphous polypore mushroom Abortiporus biennis(?) collected from Sand Branch Loop Trail in Sam Houston National Forest near Montgomery. Texas, September 6, 2025The observations document the presence of Blushing Rosette mushrooms (Abortiporus biennis) in various locations, primarily in Lick Creek Park and Sam Houston National Forest, over several years (2020-2022). The mushrooms were found growing on oak tree roots, stumps, fallen branches, and even pressed wood chips. Observations include detailed descriptions of the mushroom's appearance, including its irregular caps, pores, and spores. Some observations note the presence of red droplets (guttation) on the mushrooms. Microscopic examination of spores was also conducted. The data suggests that Abortiporus biennis is a common species in the area, with repeated sightings over several years. The observations provide valuable information on the habitat, growth patterns, and morphology of this mushroom species. Overall, the data contributes to a better understanding of the ecology and distribution of Blushing Rosette mushrooms in the region.
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