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Fungi: Basidiomycota: Agaricomycetes: Hymenochaetales: Hymenochaetaceae: Xanthoporia radiata (Sowerby) Ţura, Zmitr., Wasser, Raats & Nevo

Xanthoporia radiata – alder bracket

Synonyms: Boletus radiatus, Fomes radiatus, Fomes variegatus, Inoderma radiatum, Inodermus polymorphus, Inodermus radiatus, Inonotus polymorphus, Inonotus radiatus, Mensularia radiata, Microporus aureonitens, Microporus polymorphus, Microporus radiatus, Ochroporus polymorphus, Ochroporus radiatus, Placodes variegatus, Polyporus aureonitens, Polyporus coffeaceus, Polyporus cucullatus, Polyporus polymorphus, Polyporus radiatus, Polystictus aureonitens, Polystictus polymorphus, Polystictus radiatus, Polystictus scrobiculatus, Trametes radiata, Xanthochrous aureonitens, Xanthochrous radiatus.

Common name: alder bracket.

AI-generated description

Xanthoporia radiata is a crustose fungus that grows on trees, particularly oak species. In East and Central Texas, it is commonly found on Quercus buckleyi and Quercus stellata. The fungus produces orange to yellow-orange fruiting bodies with radiating, finger-like projections. It is typically 2-6 cm in diameter and has a smooth, waxy appearance. Xanthoporia radiata is often associated with wounds or cankers on the host tree, suggesting a possible parasitic relationship.

Photos of this mushroom from East and Central Texas

Alder bracket mushrooms (<B>Xanthoporia radiata</B>)(?) on a small osage orange tree in a pine forest on Richards Loop Trail in Sam Houston National Forest. Texas, <A HREF="../date-en/2020-06-27.htm">June 27, 2020</A>
LinkAlder bracket mushrooms (Xanthoporia radiata)(?) on a small osage orange tree in a pine forest on Richards Loop Trail in Sam Houston National Forest. Texas, June 27, 2020
Location on mapsLittle Lake Creek Loop Trail, Montgomery, TX 77356, USA
Alder bracket mushrooms (<B>Xanthoporia radiata</B>)(?) with their underside on a small osage orange tree in a pine forest on Richards Loop Trail in Sam Houston National Forest. Texas, <A HREF="../date-en/2020-06-27.htm">June 27, 2020</A>
LinkAlder bracket mushrooms (Xanthoporia radiata)(?) with their underside on a small osage orange tree in a pine forest on Richards Loop Trail in Sam Houston National Forest. Texas, June 27, 2020
Location on mapsLittle Lake Creek Loop Trail, Montgomery, TX 77356, USA
Alder bracket mushrooms (<B>Xanthoporia radiata</B>)(?) with cross section on a small osage orange tree in a pine forest on Richards Loop Trail in Sam Houston National Forest. Texas, <A HREF="../date-en/2020-06-27.htm">June 27, 2020</A>
LinkAlder bracket mushrooms (Xanthoporia radiata)(?) with cross section on a small osage orange tree in a pine forest on Richards Loop Trail in Sam Houston National Forest. Texas, June 27, 2020
Location on mapsLittle Lake Creek Loop Trail, Montgomery, TX 77356, USA
Polypore mushroom <B>Xanthoporia radiata</B> (Inonotus radiatus) on a small oak on Caney Creek section of Lone Star Hiking Trail in Sam Houston National Forest north from Montgomery. Texas, <A HREF="../date-en/2022-09-18.htm">September 18, 2022</A>
LinkPolypore mushroom Xanthoporia radiata (Inonotus radiatus) on a small oak on Caney Creek section of Lone Star Hiking Trail in Sam Houston National Forest north from Montgomery. Texas, September 18, 2022
Location on mapsLone Star Hiking Trail, Montgomery County, Texas, United States
Underside of polypore mushroom <B>Xanthoporia radiata</B> (Inonotus radiatus) from a small oak on Caney Creek section of Lone Star Hiking Trail in Sam Houston National Forest north from Montgomery. Texas, <A HREF="../date-en/2022-09-18.htm">September 18, 2022</A>
LinkUnderside of polypore mushroom Xanthoporia radiata (Inonotus radiatus) from a small oak on Caney Creek section of Lone Star Hiking Trail in Sam Houston National Forest north from Montgomery. Texas, September 18, 2022
Location on mapsLone Star Hiking Trail, Montgomery County, Texas, United States
Spores of polypore mushroom <B>Xanthoporia radiata</B> (Inonotus radiatus) from a small oak collected a day before on Caney Creek section of Lone Star Hiking Trail in Sam Houston National Forest north from Montgomery. Texas, September 19, 2022
LinkSpores of polypore mushroom Xanthoporia radiata (Inonotus radiatus) from a small oak collected a day before on Caney Creek section of Lone Star Hiking Trail in Sam Houston National Forest north from Montgomery. Texas, September 19, 2022

AI-generated summary of observations

Xanthoporia radiata was observed growing on trees in East and Central Texas. On June 27, 2020, it was found on a small osage orange tree in a pine forest on Richards Loop Trail in Sam Houston National Forest. The mushrooms were seen with their underside and cross-section visible. Later, on September 18, 2022, the fungus was spotted on a small oak on Caney Creek section of Lone Star Hiking Trail in Sam Houston National Forest. The underside of the mushroom was also observed, and spores were collected from the same location the next day. The host trees varied, with observations on both osage orange and oak trees. The sightings occurred in different seasons, with June and September records, indicating a possible wide range of fruiting times for Xanthoporia radiata in the region.

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Acknowledgements

Mushroom Observer and Facebook for learning names of local mushrooms.

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