Synonyms: Anaptychia casarettiana, Heterodermia casarettiana.
Polyblastidium casarettianum is a crustose lichen species that grows on trees, particularly oak and elm. In East and Central Texas, it is commonly found in deciduous forests and woodlands, where it forms yellow-green to grayish patches on bark. The thallus is thin and cracked, with numerous black perithecia containing brown ascospores. It is a relatively rare species in the region, but can be locally abundant in areas with suitable habitat.
Fringe lichen Heterodermia casarettiana (Polyblastidium casarettianum) on a tree on Caney Creek section of Lone Star Hiking Trail in Sam Houston National Forest near Huntsville. Texas, March 2, 2019
Lone Star Hiking Trail, Montgomery, TX 77356, USA
Fringe lichen Heterodermia casarettiana (Polyblastidium casarettianum) with light underside on a tree on Caney Creek section of Lone Star Hiking Trail in Sam Houston National Forest near Huntsville. Texas, March 2, 2019Lone Star Hiking Trail, Montgomery, TX 77356, USAObservations of Polyblastidium casarettianum in East and Central Texas reveal its presence on trees in the region. On March 2, 2019, the species was spotted on a tree along the Caney Creek section of the Lone Star Hiking Trail in Sam Houston National Forest near Huntsville. The lichen, also known as fringe lichen or Heterodermia casarettiana, was observed to have a distinctive light underside. The species appears to thrive in this environment, with sightings indicating its ability to grow on trees in the area. Further observations may be necessary to fully understand the distribution and habits of Polyblastidium casarettianum in East and Central Texas, but these initial findings provide valuable insights into its presence in the region. The species' growth patterns and preferred habitats are notable aspects of its biology in this area.
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