Synonym: Lactarius petersenii.
Lactifluus petersenii is a species of milk-cap fungus that grows on the ground in association with oak and pine trees. In East and Central Texas, it typically fruits from June to October, producing medium-sized, funnel-shaped caps that are reddish-brown to orange-brown with white to pale yellow gills and a white to pale yellow stem. The flesh exudes a white, milk-like latex when cut or bruised. It can be found in a variety of habitats, including woodlands, forests, and along roadsides, often in areas with rich soil and abundant leaf litter.
Brown milkcap mushrooms Lactifluus petersenii (Lactarius petersenii)(?) in frequently flooded area on Caney Creek Trail (Little Lake Creek Loop Trail) in Sam Houston National Forest, near Huntsville. Texas, June 2, 2018
Lone Star Hiking Trail, Montgomery, TX 77356, USA
Group of brown milkcap mushrooms Lactifluus petersenii (Lactarius petersenii)(?) in frequently flooded area on Caney Creek Trail (Little Lake Creek Loop Trail) in Sam Houston National Forest, near Huntsville. Texas, June 2, 2018LSHT Little Lake Creek Loop, Montgomery, TX 77356, USA
Dissected brown milkcap mushrooms Lactifluus petersenii (Lactarius petersenii)(?) in frequently flooded area on Caney Creek Trail (Little Lake Creek Loop Trail) in Sam Houston National Forest, near Huntsville. Texas, June 2, 2018Lone Star Hiking Trail, Montgomery, TX 77356, USA
Hypomyces fungus on brown milkcap mushrooms Lactifluus petersenii (Lactarius petersenii)(?) in frequently flooded area on Caney Creek Trail (Little Lake Creek Loop Trail) in Sam Houston National Forest, near Huntsville. Texas, June 2, 2018Lone Star Hiking Trail, Montgomery, TX 77356, USA
Gills of milkcap mushroom Lactifluus petersenii (Lactarius petersenii) in Little Thicket Nature Sanctuary. Found at mushroom walk of GSMS. Cleveland, Texas, November 3, 2018Sam Houston National Forest, 394 FM 1375, New Waverly, TX 77358, USA
Milkcap mushroom Lactifluus petersenii (Lactarius petersenii) in Little Thicket Nature Sanctuary. Found at mushroom walk of GSMS. Cleveland, Texas, November 3, 2018Sam Houston National Forest, 394 FM 1375, New Waverly, TX 77358, USA
Gills of milkcap mushroom Lactifluus petersenii (Lactarius petersenii) in Little Thicket Nature Sanctuary. Found at mushroom walk of GSMS. Cleveland, Texas, November 3, 2018Sam Houston National Forest, 394 FM 1375, New Waverly, TX 77358, USA
Milkcap mushroom Lactifluus petersenii (Lactarius petersenii) in Little Thicket Nature Sanctuary. Found at mushroom walk of GSMS. Cleveland, Texas, November 3, 2018Sam Houston National Forest, 394 FM 1375, New Waverly, TX 77358, USA
Milkcap mushrooms Lactifluus petersenii (Lactarius petersenii) collected by people at mushroom walk of Gulf States Mycological Society. Little Thicket Nature Sanctuary, Cleveland, Texas, November 3, 2018Sam Houston National Forest, 394 FM 1375, New Waverly, TX 77358, USA
Underside of milkcap mushrooms Lactifluus petersenii (Lactarius petersenii)(?) in Lick Creek Park. College Station, Texas, June 25, 2019Raccoon Run, College Station, TX 77845, USA
Milkcap mushrooms Lactifluus petersenii (Lactarius petersenii)(?) in Lick Creek Park. College Station, Texas, June 25, 2019Raccoon Run, College Station, TX 77845, USA
Milkcap mushrooms Lactifluus petersenii (Lactarius petersenii) on Richards Loop Trail in Sam Houston National Forest. Texas, April 11, 2020Little Lake Creek Loop Trail, Montgomery, TX 77356, USA
Caps and gills of milkcap mushrooms Lactifluus petersenii (Lactarius petersenii) on Richards Loop Trail in Sam Houston National Forest. Texas, April 11, 2020Little Lake Creek Loop Trail, Montgomery, TX 77356, USA
Milkcap mushroom Lactifluus petersenii (Lactarius petersenii)(?) on Stubblefield section of Lone Star hiking trail north from Trailhead No. 6 in Sam Houston National Forest. Texas, May 6, 2020Lone Star Hiking Trail, Montgomery, TX 77356, USA
Cap of milkcap mushroom Lactifluus petersenii (Lactarius petersenii)(?) on Stubblefield section of Lone Star hiking trail north from Trailhead No. 6 in Sam Houston National Forest. Texas, May 6, 2020Lone Star Hiking Trail, Montgomery, TX 77356, USA
Dissected milkcap mushroom Lactifluus petersenii (Lactarius petersenii)(?) on Stubblefield section of Lone Star hiking trail north from Trailhead No. 6 in Sam Houston National Forest. Texas, May 6, 2020Lone Star Hiking Trail, Montgomery, TX 77356, USA
Milkcap mushrooms Lactifluus petersenii (Lactarius petersenii)(?) on Stubblefield section of Lone Star hiking trail north from Trailhead No. 6 in Sam Houston National Forest. Texas, July 31, 2020Lone Star Hiking Trail, Montgomery, TX 77356, USA
Gills of milkcap mushrooms Lactifluus petersenii (Lactarius petersenii) on Stubblefield section of Lone Star hiking trail north from Trailhead No. 6 in Sam Houston National Forest. Texas, July 31, 2020Lone Star Hiking Trail, Montgomery, TX 77356, USA
Milkcap mushrooms Lactifluus petersenii (Lactarius petersenii) on a sandy path on Stubblefield section of Lone Star hiking trail north from Trailhead No. 6 in Sam Houston National Forest. Texas, July 31, 2020Lone Star Hiking Trail, Montgomery, TX 77356, USA
Gills of a milkcap mushroom Lactifluus petersenii exuding milk on Stubblefield section of Lone Star hiking trail north from Trailhead No. 6 in Sam Houston National Forest. Texas, July 23, 2021Lone Star Hiking Trail, Montgomery, TX 77356, USA
Milkcap mushrooms Lactifluus petersenii on Stubblefield section of Lone Star hiking trail north from Trailhead No. 6 in Sam Houston National Forest. Texas, July 23, 2021Lone Star Hiking Trail, Montgomery, TX 77356, USA
Milkcap mushrooms Lactifluus petersenii (Lactarius petersenii) on an old forest road on South Wilderness Loop Trail at Little Lake Creek Wilderness in Sam Houston National Forest near Richards. Texas, October 23, 2021Forest Service Rd 231, Montgomery County, Texas, United States
Gills of a milkcap mushroom Lactifluus petersenii (Lactarius petersenii) on South Wilderness Loop Trail at Little Lake Creek Wilderness in Sam Houston National Forest near Richards. Texas, October 23, 2021Forest Service Rd 231, Montgomery County, Texas, United States
Side view of milkcap mushrooms Lactifluus petersenii (Lactarius petersenii) on an old forest road on South Wilderness Loop Trail at Little Lake Creek Wilderness in Sam Houston National Forest near Richards. Texas, October 23, 2021Forest Service Rd 231, Montgomery County, Texas, United States
Cross section of milkcap mushrooms Lactifluus petersenii (Lactarius petersenii) on an old forest road on South Wilderness Loop Trail at Little Lake Creek Wilderness in Sam Houston National Forest near Richards. Texas, October 23, 2021Forest Service Rd 231, Montgomery County, Texas, United States
Milkcap mushroom Lactifluus petersenii (Lactarius petersenii)(?) in Big Creek Scenic Area of Sam Houston National Forest. Shepherd, Texas, April 30, 2023Lone Star Hiking Trail, San Jacinto County, Texas, United States
Underside of milkcap mushroom Lactifluus petersenii (Lactarius petersenii)(?) in Big Creek Scenic Area of Sam Houston National Forest. Shepherd, Texas, April 30, 2023Lone Star Hiking Trail, San Jacinto County, Texas, United States
Spores of milkcap mushroom Lactifluus petersenii (Lactarius petersenii)(?) collected in Big Creek Scenic Area of Sam Houston National Forest. Texas, April 30, 2023
Milkcap mushrooms Lactifluus petersenii(?) in wet area on Caney Creek Trail (Little Lake Creek Loop Trail) in Sam Houston National Forest north from Montgomery. Texas, September 13, 2024Little Lake Creek Loop Trail, Montgomery County, Texas, 77873, United States
Underside of a milkcap mushroom Lactifluus petersenii(?) on Caney Creek Trail (Little Lake Creek Loop Trail) in Sam Houston National Forest north from Montgomery. Texas, September 13, 2024Little Lake Creek Loop Trail, Montgomery County, Texas, 77873, United States
Section of a milkcap mushrooms Lactifluus petersenii(?) in wet area on Caney Creek Trail (Little Lake Creek Loop Trail) in Sam Houston National Forest north from Montgomery. Texas, September 13, 2024Little Lake Creek Loop Trail, Montgomery County, Texas, 77873, United StatesThe fungus Lactifluus petersenii was observed in East and Central Texas over a period of six years (2018-2024). A total of 31 observations were recorded in various locations, including Sam Houston National Forest, Little Thicket Nature Sanctuary, and Lick Creek Park. The mushrooms were found in frequently flooded areas, on sandy paths, and near old forest roads. Observations included single mushrooms, groups, and dissected specimens, showcasing the fungus's characteristics, such as its brown cap, gills, and milk-like latex. Some observations also noted the presence of Hypomyces fungus on the mushrooms. The recordings provide a comprehensive overview of Lactifluus petersenii's distribution and habits in the region, highlighting its presence in diverse environments and its variability in appearance.
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