Synonyms: Imbricaria dubia, Lichen dubius, Parmelia borreri, Parmelia dubia, Parmelia helenae, Parmelia maculato, Parmelia subrudecta, Parmotrema dubium, Punctelia helenae.
Common name: Powdered Speckled Shield Lichen.
Punctelia subrudecta is a foliose lichen species characterized by its pale gray to white thallus with rounded lobes, typically 2-5 mm wide. It has numerous small, dark brown to black apothecia on the upper surface. In East and Central Texas, Punctelia subrudecta is commonly found growing on trees, particularly oak and cedar, in open woodlands and along forest edges. It thrives in areas with full sun to partial shade and moderate to high humidity. The species is widely distributed across the region, with records from counties including Bastrop, Travis, Williamson, and Brazos.
Powdered speckled shield lichen (Punctelia subrudecta) or may be P. caseana on Caney Creek section of Lone Star Hiking Trail in Sam Houston National Forest near Huntsville. Texas, January 26, 2019
Lone Star Hiking Trail, Montgomery, TX 77356, USAObservations of the species Punctelia subrudecta in East and Central Texas reveal its presence on various tree species. On January 26, 2019, specimens were found on the Caney Creek section of the Lone Star Hiking Trail in Sam Houston National Forest near Huntsville, Texas. The lichen was identified as either Punctelia subrudecta or possibly P. caseana, highlighting the need for further taxonomic clarification. The discovery of this species in the region contributes to the understanding of its distribution and habitat preferences in East and Central Texas. Further study is necessary to confirm the identity and fully document the range of Punctelia subrudecta in this area, including its interactions with environmental factors and other organisms. This information can inform conservation efforts and enhance knowledge of lichen diversity in the region. Additional observations are needed to fully understand its ecological role.
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