Common name: spotted rosette lichen.
Physcia pumilior is a crustose to squamulose lichen that grows on trees, rocks, and soil. It has a grayish-white to pale brown thallus with rounded lobes, and its apothecia are brown to dark brown with a prominent thalline margin. In East and Central Texas, Physcia pumilior is commonly found on oak and cedar trees, as well as on limestone rocks and caliche soils, particularly in open woodlands and along rocky outcrops.
Spotted rosette lichen (Physcia pumilior(?)) on a tombstone in Old Independence Cemetery near Independence. Texas, February 10, 2019
8675 Coles Rd, Brenham, TX 77833, USA
Brown apothecia of spotted rosette lichen (Physcia pumilior(?)) on a tombstone in Old Independence Cemetery near Independence. Texas, February 10, 20198675 Coles Rd, Brenham, TX 77833, USA
Spotted rosette lichen (Physcia pumilior(?)) with brown apothecia on a tombstone in Old Independence Cemetery near Independence. Texas, February 10, 20198675 Coles Rd, Brenham, TX 77833, USA
Spotted rosette lichen Physcia pumilior on a tree bark in TAMU Horticultural Gardens in Texas A and M University. College Station, Texas, February 12, 2019530 Floriculture Rd, College Station, TX 77840, USA
Spotted rosette lichen Physcia pumilior with apothecia on a tree bark in TAMU Horticultural Gardens in Texas A and M University. College Station, Texas, February 12, 2019530 Floriculture Rd, College Station, TX 77840, USA
Spotted rosette lichen Physcia pumilior on an iron sculpture in TAMU Horticultural Gardens in Texas A and M University. College Station, Texas, February 12, 2019530 Floriculture Rd, College Station, TX 77840, USA
Spotted rosette lichen (Physcia pumilior) on a huisache(?) tree in abandoned TAMU Horticultural Gardens in Texas A and M University. College Station, Texas, February 22, 2019530 Floriculture Rd, College Station, TX 77840, USA
Spotted rosette lichen (Physcia pumilior) with brown apothecia on a huisache(?) tree in abandoned TAMU Horticultural Gardens in Texas A and M University. College Station, Texas, February 22, 2019530 Floriculture Rd, College Station, TX 77840, USAObservations of Physcia pumilior in East and Central Texas reveal the species' presence on various substrates. The lichen was found growing on tombstones in Old Independence Cemetery, displaying brown apothecia. It also thrived on tree bark in TAMU Horticultural Gardens, with some specimens showing apothecia. Additionally, Physcia pumilior was observed on an iron sculpture and a huisache tree in the same gardens. The lichen's ability to grow on different surfaces, including stone, wood, and metal, highlights its adaptability. Brown apothecia were consistently present across various observations, indicating the species' reproductive activity in the region. These findings suggest that Physcia pumilior is a common and widespread species in East and Central Texas, capable of colonizing diverse substrates. Its presence was documented in both maintained and abandoned areas, demonstrating its resilience.
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