Synonyms: Corticium chrysanthemi, Corticium cretaceum, Corticium hariotii, Corticium sambuci, Corticium serum, Grandinia sambuci, Hyphoderma sambuci, Hyphodontia hariotii, Hyphodontia sambuci, Hypochnus sambuci, Hypochnus serus, Kneiffia sera, Lyomyces sambuci, Lyomyces serus, Peniophora chrysanthemi, Peniophora sambuci, Rogersella sambuci, Thelephora calcea, Thelephora cretacea, Thelephora sambuci, Thelephora sera.
Common name: elder whitewash.
Xylodon sambuci is a species of tooth fungus that grows on dead wood, particularly on elderberry trees. In East and Central Texas, it has been found to fruit in the spring and fall, typically on moist, shaded areas with abundant decaying wood. The fungus produces small, white to cream-colored teeth that are 1-3 mm long, and its spores are cylindrical to ellipsoid in shape. It is a relatively rare species in the region, but can be found in areas with rich soil and high humidity, such as along streams and rivers.
Elder whitewash fungus (Xylodon sambuci, Hyphodontia sambuci) under a fallen oak at Lake Somerville Trailway near Birch Creek Unit of Somerville Lake State Park. Texas, December 21, 2019
Lake Somerville Trailway, Somerville, TX 77879, USA
Texture of elder whitewash fungus (Xylodon sambuci, Hyphodontia sambuci) under a fallen oak at Lake Somerville Trailway near Birch Creek Unit of Somerville Lake State Park. Texas, December 21, 2019Lake Somerville Trailway, Somerville, TX 77879, USA
Close up of elder whitewash fungus (Xylodon sambuci, Hyphodontia sambuci) under a fallen oak at Lake Somerville Trailway near Birch Creek Unit of Somerville Lake State Park. Texas, December 21, 2019Lake Somerville Trailway, Somerville, TX 77879, USA
Elder whitewash fungus (Xylodon sambuci, Hyphodontia sambuci)(?) growing on upper side of fallen twigs on Caney Creek Trail (Little Lake Creek Loop Trail) in Sam Houston National Forest north from Montgomery. Texas, December 27, 2019Little Lake Creek Loop Trail, Montgomery, TX 77356, USA
Whitewash fungus Xylodon sambuci (Hyphodontia sambuci)(?) on fallen twigs and a black corticioid fungus Chaetosphaerella phaeostroma on a fallen tree limb on Caney Creek Trail (Little Lake Creek Loop Trail) in Sam Houston National Forest north from Montgomery. Texas, January 12, 2020Little Lake Creek Loop Trail, Montgomery, TX 77356, USA
Cracked white corticioid (crust) fungus Xylodon sambuci (Hyphodontia sambuci)(?) on a completely rotten hollow tree branch on Richards Loop Trail in Sam Houston National Forest. Texas, December 15, 2020Lone Star Hiking Trail, Montgomery, TX 77356, USA
Corticioid fungus elder whitewash (Xylodon sambuci)(?) on Caney Creek Trail (Little Lake Creek Loop Trail) in Sam Houston National Forest north from Montgomery. Texas, January 19, 2022Little Lake Creek Loop Trail, Montgomery County, Texas, 77873, United States
Elder whitewash fungus (Xylodon sambuci) (upper side) and some white corticioid (lower side) on dry stems of Yaupon holly on Caney Creek Trail (Little Lake Creek Loop Trail) in Sam Houston National Forest north from Montgomery. Texas, January 7, 2023Little Lake Creek Loop Trail, Montgomery County, Texas, 77873, United States
Elder whitewash (Xylodon sambuci) (upper side) and some white corticioid fungus (lower side) on dry stems of Yaupon holly on Caney Creek Trail (Little Lake Creek Loop Trail) in Sam Houston National Forest north from Montgomery. Texas, January 7, 2023Little Lake Creek Loop Trail, Montgomery County, Texas, 77873, United States
Elder whitewash fungus (Xylodon sambuci) on a dry stem of Yaupon holly on Caney Creek Trail (Little Lake Creek Loop Trail) in Sam Houston National Forest north from Montgomery. Texas, January 7, 2023Little Lake Creek Loop Trail, Montgomery County, Texas, 77873, United States
Elder whitewash (Xylodon sambuci) crust fungus on fallen stems of Yaupon holly on South Wilderness Loop Trail at Little Lake Creek Wilderness in Sam Houston National Forest near Richards. Texas, November 19, 2023Little Lake Creek Loop Trail, Montgomery County, Texas, 77873, United States
Corticioid fungus Elder whitewash (Xylodon sambuci) on fallen twigs of Yaupon on South Wilderness Loop Trail at Little Lake Creek Wilderness in Sam Houston National Forest near Richards. Texas, November 19, 2023Little Lake Creek Loop Trail, Montgomery County, Texas, 77873, United States
Spores of elder whitewash fungus (Xylodon sambuci) from a dry Yaupon holly, collected a day before in Sam Houston National Forest. Texas, November 20, 2023
Spores (in lugol) of elder whitewash fungus (Xylodon sambuci) collected a day before in Sam Houston National Forest. Texas, November 20, 2023Observations of Xylodon sambuci in East and Central Texas show the fungus growing on various substrates, including fallen oaks, twigs, and dry stems of Yaupon holly. It was found in several locations, including Lake Somerville Trailway, Sam Houston National Forest, and Little Lake Creek Wilderness. The fungus exhibits a white, cracked corticioid crust texture and was observed on both the upper and lower sides of substrates. It was also found growing alongside other fungi, such as Chaetosphaerella phaeostroma. Spore samples were collected from dry Yaupon holly stems, and observations were made over several years, from 2019 to 2023, indicating a consistent presence of the fungus in the region. The fungus was observed in various stages of growth, including close-up views of its texture and spores.
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