Synonyms: Boletus cinerascens, Boletus tulipiferae, Boletus tupiliferae, Coriolus canescens, Coriolus lacteus, Coriolus tulipiferae, Daedalea diabolica, Hirschioporus lacteus, Hydnum lacteum, Irpex bresadolae, Irpex canescens, Irpex cinerascens, Irpex diabolicus, Irpex hirsutus, Irpex pallescens, Irpex sinuosus, Irpex tulipiferae, Irpiciporus lacteus, Irpiciporus tulipiferae, Microporus chartaceus, Microporus cinerascens, Microporus cinerescens, Polyporus chartaceus, Polyporus corticola, Polyporus tulipiferae, Polyporus tulipiferus, Polystictus bresadolae, Polystictus chartaceus, Polystictus cinerascens, Polystictus cinerescens, Polystictus tulipiferae, Poria cincinnati, Poria tulipiferae, Sistotrema lacteum, Steccherinum lacteum, Trametes lactea, Xylodon bresadolae, Xylodon canescens, Xylodon hirsutus, Xylodon lacteus, Xylodon pallescens, Xylodon sinuosus.
Common name: Milk-white Toothed Polypore.
Extract from Wikipedia article: Irpex lacteus is a common crust fungus distributed throughout temperate areas of the world. It is the type of the genus Irpex. Irpex lacteus is considered a polypore, but depending on growth conditions it can also produce a hydnoid hymenophore. Due to this variability and abundance of the species it has been described as a new species to science numerous times and subsequently has an extensive synonymy. The complete genome sequence of Irpex lacteus was reported in 2017.
Hungarian: Fehérbélű egyrétűtapló, Russian: Ирпекс молочно-белый, Swedish: Vittagging.
Irpex lacteus is a white-rot fungus that grows on decaying wood, particularly hardwoods. In East and Central Texas, it is commonly found on fallen trees, stumps, and logs, often in moist, shaded areas. The fungus produces small, creamy-white to pale yellowish-brown shelf-like or crust-like fruiting bodies that are typically 1-5 cm wide and have a smooth, wavy, or lobed margin. It is a relatively common species in the region, particularly in wooded areas with abundant deciduous tree species, such as oak, maple, and elm.
Mushrooms Irpex lacteus on a dry trunk of yaupon(?) in Lick Creek Park. College Station, Texas, January 6, 2019
Iron Bridge Trail, College Station, TX 77845, USA
Polypore mushroom Irpex lacteus on a dry branch of yaupon in Lick Creek Park. College Station, Texas, January 18, 2019
Milk-white toothed polypore mushroom (Irpex lacteus) on underside of fallen twigs in Hensel Park. College Station, Texas, January 26, 2021Hensel Park, College Ave, College Station, TX 77840, USA
Close-up of milk-white toothed polypore mushroom (Irpex lacteus) on underside of fallen twigs in Hensel Park. College Station, Texas, January 26, 2021Hensel Park, College Ave, College Station, TX 77840, USA
Partially dried milk-white toothed polypore mushroom (Irpex lacteus) on a fallen twig in Hensel Park. College Station, Texas, January 26, 2021Hensel Park, College Ave, College Station, TX 77840, USA
Milk-white toothed polypore mushroom (Irpex lacteus) on twigs taken from Hensel Park on black background. College Station, Texas, January 26, 2021
Young stage of milk-white toothed polypore mushroom (Irpex lacteus) on twigs in Washington-on-the-Brazos State Historic Site. Washington, Texas, December 1, 2021Washington-on-the-Brazos State Historic Site, Farm-to-Market Road 1155, Washington, Washington County, Texas, 77880, United States
Close-up of milk-white toothed polypore mushroom (Irpex lacteus) on a fallen tree branch on Iron Bridge Trail in Lick Creek Park. College Station, Texas, February 14, 2022Racoon Run Trail, College Station, Brazos County, Texas, United States
Milk-white toothed polypore mushroom (Irpex lacteus) on a fallen tree branch on Iron Bridge Trail in Lick Creek Park. College Station, Texas, February 14, 2022Racoon Run Trail, College Station, Brazos County, Texas, United States
Margin of milk-white toothed polypore mushroom (Irpex lacteus) on a fallen tree branch on Iron Bridge Trail in Lick Creek Park. College Station, Texas, February 14, 2022Racoon Run Trail, College Station, Brazos County, Texas, United States
Texture of milk-white toothed polypore mushroom (Irpex lacteus) on a fallen tree branch on Iron Bridge Trail in Lick Creek Park. College Station, Texas, February 14, 2022Racoon Run Trail, College Station, Brazos County, Texas, United States
Young milk-white toothed polypore mushroom (Irpex lacteus) on a fallen tree branch on Iron Bridge Trail in Lick Creek Park. College Station, Texas, February 14, 2022Racoon Run Trail, College Station, Brazos County, Texas, United States
Milk-white toothed polypore mushroom (Irpex lacteus) together with splitgill (Schizophyllum commune) on a fallen twig at Lake Somerville Trailway near Birch Creek Unit of Somerville Lake State Park. Texas, September 8, 2022Lakeview Lane, Burleson County, Texas, 77879, United States
Close-up of milk-white toothed polypore mushroom (Irpex lacteus) on a fallen twig at Lake Somerville Trailway near Birch Creek Unit of Somerville Lake State Park. Texas, September 8, 2022Lakeview Lane, Burleson County, Texas, 77879, United States
Spores of mushroom Irpex lacteus from small standing dead oak collected on Caney Creek Trail (Little Lake Creek Loop Trail) in Sam Houston National Forest north from Montgomery. Texas, September 14, 2022
Milk-white Toothed Polypore mushroom (Irpex lacteus) on a fallen twig in Lick Creek Park. College Station, Texas, January 2, 2023
Milk-white Toothed Polypore mushroom (Irpex lacteus) on a fallen twig in Lick Creek Park. College Station, Texas, November 27, 2023Racoon Run Trail, College Station, Brazos County, Texas, United States
Spores of Milk-white Toothed Polypore mushroom (Irpex lacteus) collected a day before in Lick Creek Park. College Station, Texas, November 28, 2023
Milk-white toothed polypore mushroom (Irpex lacteus) on a fallen twig in Lick Creek Park. College Station, Texas, December 26, 2023Iron Bridge Trail, College Station, Brazos County, Texas, United States
Texture of milk-white toothed polypore mushroom (Irpex lacteus) on a fallen twig in Lick Creek Park. College Station, Texas, December 26, 2023Iron Bridge Trail, College Station, Brazos County, Texas, United States
Close-up of milk-white toothed polypore mushroom (Irpex lacteus) on a fallen twig in Lick Creek Park. College Station, Texas, December 26, 2023Iron Bridge Trail, College Station, Brazos County, Texas, United States
Milk-white toothed polypore mushroom (Irpex lacteus) on a branching twig in Lick Creek Park. College Station, Texas, December 26, 2023Iron Bridge Trail, College Station, Brazos County, Texas, United States
Young growth of milk-white toothed polypore mushroom (Irpex lacteus) on a fallen twig in Lick Creek Park. College Station, Texas, December 26, 2023Iron Bridge Trail, College Station, Brazos County, Texas, United States
Spores of milk-white toothed polypore mushrooms (Irpex lacteus) collected 3 days before in Lick Creek Park. College Station, Texas, December 29, 2023
Milk-white Toothed Polypore mushrooms (Irpex lacteus)(?) on a tall stump of elm(?) tree near Pole Creek on North Wilderness Trail of Little Lake Creek Wilderness in Sam Houston National Forest north from Montgomery. Texas, January 4, 2024Lone Star Hiking Trail, Montgomery County, Texas, United States
Milk-white Toothed Polypore mushrooms (Irpex lacteus)(?) in crevices of bark of a tall stump of elm(?) tree near Pole Creek on North Wilderness Trail of Little Lake Creek Wilderness in Sam Houston National Forest north from Montgomery. Texas, January 4, 2024Lone Star Hiking Trail, Montgomery County, Texas, United States
Close-up of Milk-white Toothed Polypore mushrooms (Irpex lacteus)(?) on a tall stump of elm(?) tree near Pole Creek on North Wilderness Trail of Little Lake Creek Wilderness in Sam Houston National Forest north from Montgomery. Texas, January 4, 2024Lone Star Hiking Trail, Montgomery County, Texas, United States
Hairy caps of Milk-white Toothed Polypore mushrooms (Irpex lacteus)(?) on a tall stump of elm(?) tree near Pole Creek on North Wilderness Trail of Little Lake Creek Wilderness in Sam Houston National Forest north from Montgomery. Texas, January 4, 2024Lone Star Hiking Trail, Montgomery County, Texas, United States
Spores of mushrooms Irpex lacteus(?) from a tall stump of elm(?) tree, collected in Sam Houston National Forest. Texas, January 4, 2024
Spore size 5.2 - 6.7 × 3.3 - 4.2 µm, length to width ratio Q = 1.5 - 1.7.The fungus Irpex lacteus was observed in East and Central Texas over several years. Most sightings were in Lick Creek Park, College Station, with additional observations in Hensel Park, Washington-on-the-Brazos State Historic Site, Lake Somerville Trailway, Sam Houston National Forest, and Little Lake Creek Wilderness. The fungus typically grew on fallen twigs, branches, or trunks of various tree species, including yaupon and oak. Observations were made during different times of the year, with a concentration in winter months (December to February). The observations included various stages of growth, from young to mature, and some close-up views of the mushroom's texture and spores. The data suggests that Irpex lacteus is a common and widespread species in the region, with a preference for deciduous trees and a wide range of habitats.
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