Truncospora mexicana is a species of polypore fungus that grows on deciduous trees, particularly oak and elm. In East and Central Texas, it has been found to fruit in summer and fall, typically on living trees with wounded or dying branches. The fungus produces annual, semicircular to fan-shaped brackets with a reddish-brown upper surface and white to cream-colored pores. It is considered a relatively rare species in the region, but can be locally common in areas with suitable hosts.
Pores of a small (around 6 cm in diameter) completely dried polypore mushroom Truncospora mexicana or may be Perenniporia ochroleuca on a fallen oak branch under naturally growing live oaks, on a windy slope without grass at Lake Somerville Trailway near Birch Creek Unit of Somerville Lake State Park. Texas, January 18, 2021
Lake Somerville Trailway, Somerville, TX 77879, USA
Small (around 6 cm in diameter) polypore mushrooms Truncospora mexicana or may be Perenniporia ochroleuca on a fallen oak branch under naturally growing live oaks, on a windy slope without grass at Lake Somerville Trailway near Birch Creek Unit of Somerville Lake State Park. Texas, January 18, 2021Lake Somerville Trailway, Somerville, TX 77879, USA
Small (around 6 cm in diameter) polypore mushrooms Truncospora mexicana or may be Perenniporia ochroleuca on a fallen oak branch under naturally growing live oaks, together with Phellinus at Lake Somerville Trailway near Birch Creek Unit of Somerville Lake State Park. Texas, January 18, 2021Lake Somerville Trailway, Somerville, TX 77879, USA
Small (around 6 cm in diameter) polypore mushrooms Truncospora mexicana or may be Perenniporia ochroleuca on a fallen oak branch, together with Phellinus at Lake Somerville Trailway near Birch Creek Unit of Somerville Lake State Park. Texas, January 18, 2021Lake Somerville Trailway, Somerville, TX 77879, USA
Bracket polypore mushrooms Truncospora mexicana (T. ochroleuca group) on a thin tree under oaks, juniper near a pond near the entrance, at Lake Somerville Trailway near Birch Creek Unit of Somerville Lake State Park. Texas, January 1, 2023Parkview Drive, Burleson County, Texas, 77863, United States
Underside of bracket polypore mushrooms Truncospora mexicana on a fallen trunk of a broadleaf tree near a pond at Lake Somerville Trailway near Birch Creek Unit of Somerville Lake State Park. Texas, January 1, 2023Parkview Drive, Burleson County, Texas, 77863, United States
Cross section of bracket polypore mushrooms Truncospora mexicana on a fallen trunk of a broadleaf tree near a pond at Lake Somerville Trailway near Birch Creek Unit of Somerville Lake State Park. Texas, January 1, 2023Parkview Drive, Burleson County, Texas, 77863, United States
Bracket polypore mushrooms Truncospora mexicana turning orange on a fallen trunk of a broadleaf tree near a pond at Lake Somerville Trailway near Birch Creek Unit of Somerville Lake State Park. Texas, January 1, 2023Parkview Drive, Burleson County, Texas, 77863, United States
Caps of bracket polypore mushrooms Truncospora mexicana turning orange on a fallen trunk of a broadleaf tree near a pond at Lake Somerville Trailway near Birch Creek Unit of Somerville Lake State Park. Texas, January 1, 2023Parkview Drive, Burleson County, Texas, 77863, United States
Various views of bracket polypore mushrooms Truncospora mexicana on a fallen trunk of a broadleaf tree near a pond at Lake Somerville Trailway near Birch Creek Unit of Somerville Lake State Park. Texas, January 1, 2023Parkview Drive, Burleson County, Texas, 77863, United States
Upper surface of bracket polypore mushrooms Truncospora mexicana on a fallen trunk of a broadleaf tree near a pond at Lake Somerville Trailway near Birch Creek Unit of Somerville Lake State Park. Texas, January 1, 2023Parkview Drive, Burleson County, Texas, 77863, United States
Spores of polypore mushrooms Truncospora mexicana (T. ochroleuca group) collected a day before in Somerville Lake State Park. Texas, January 2, 2023
Spore size 7.8 - 9.4 × 4.5 - 5.5 µm, length to width ratio Q = 1.62 - 1.8.
Spores (in lugol) of polypore mushrooms Truncospora mexicana (T. ochroleuca group) collected a day before in Somerville Lake State Park. Texas, January 2, 2023Spore size 9 - 11.3 × 6.1 - 7.2 µm, length to width ratio Q = 1.5 - 1.6.
Small bracket polypore mushrooms Truncospora mexicana on a fallen mossy osage orange (Maclura), close to the ground, on Caney Creek Trail (Little Lake Creek Loop Trail) east from Trailhead No. 4 in Sam Houston National Forest north from Montgomery. Texas, November 25, 2023Little Lake Creek Loop Trail, Montgomery County, Texas, 77873, United States
Pores of small bracket polypore mushrooms Truncospora mexicana on Caney Creek Trail (Little Lake Creek Loop Trail) east from Trailhead No. 4 in Sam Houston National Forest north from Montgomery. Texas, November 25, 2023Little Lake Creek Loop Trail, Montgomery County, Texas, 77873, United States
Cross section of small bracket polypore mushrooms Truncospora mexicana on Caney Creek Trail (Little Lake Creek Loop Trail) east from Trailhead No. 4 in Sam Houston National Forest north from Montgomery. Texas, November 25, 2023Little Lake Creek Loop Trail, Montgomery County, Texas, 77873, United States
Spores of polypore mushrooms Truncospora mexicana from a fallen mossy osage orange collected two days before in Sam Houston National Forest. Texas, November 27, 2023
Small bracket polypore mushroom Truncospora mexicana on a fallen trunk of a broadleaf tree near a pond at the entrance of a trailway at Birch Creek Unit of Somerville Lake State Park. Texas, December 29, 2023127, Parkview Drive, Burleson County, Texas, 77879, United States
Small bracket polypore mushroom Truncospora mexicana together with black Hypoxylon like fungus on a fallen trunk of a broadleaf tree near a pond at the entrance of a trailway at Birch Creek Unit of Somerville Lake State Park. Texas, December 29, 2023127, Parkview Drive, Burleson County, Texas, 77879, United States
Underside of bracket polypore mushroom Truncospora mexicana on a fallen trunk of a broadleaf tree near a pond at the entrance of a trailway at Birch Creek Unit of Somerville Lake State Park. Texas, December 29, 2023127, Parkview Drive, Burleson County, Texas, 77879, United States
Larger bracket of polypore mushroom Truncospora mexicana on a fallen trunk of a broadleaf tree near a pond at the entrance of a trailway at Birch Creek Unit of Somerville Lake State Park. Texas, December 29, 2023127, Parkview Drive, Burleson County, Texas, 77879, United States
Pore surface of bracket polypore mushroom Truncospora mexicana on a fallen trunk of a broadleaf tree near a pond at the entrance of a trailway at Birch Creek Unit of Somerville Lake State Park. Texas, December 29, 2023127, Parkview Drive, Burleson County, Texas, 77879, United States
Yellowing scratch on a bracket polypore mushroom Truncospora mexicana on a fallen trunk of a broadleaf tree near a pond at the entrance of a trailway at Birch Creek Unit of Somerville Lake State Park. Texas, December 29, 2023125, Parkview Drive, Burleson County, Texas, 77879, United States
Small caps of bracket polypore mushroom Truncospora mexicana on a fallen thin trunk of a broadleaf tree near a pond at the entrance of a trailway at Birch Creek Unit of Somerville Lake State Park. Texas, December 29, 2023125, Parkview Drive, Burleson County, Texas, 77879, United States
Cross setion of bracket polypore mushroom Truncospora mexicana collected in Birch Creek Unit of Somerville Lake State Park. Texas, December 29, 2023173, Rosemary Lane, College Station, Brazos County, Texas, 77840, United StatesThe fungus Truncospora mexicana was observed in East and Central Texas on multiple occasions between January 2021 and December 2023. The majority of sightings were at Lake Somerville Trailway near Birch Creek Unit of Somerville Lake State Park, with additional observations at Sam Houston National Forest. The fungus was found growing on fallen branches and trunks of broadleaf trees, including oak and osage orange. The mushrooms were typically small, around 6 cm in diameter, and had a bracket-like shape. Some observations noted the presence of other fungi, such as Phellinus and Hypoxylon. The spores of Truncospora mexicana were also collected and examined. The observations suggest that Truncospora mexicana is a common species in the region, particularly in areas with fallen trees and minimal grass cover.
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