Blister-like pustules on underside and yellow-orange sunken spots on upper leaf surface of Carolina bristlemallow (Modiola caroliniana) caused by rust fungus Puccinia modiolae, taken from a lawn near apartments on George Bush Dr. College Station, Texas

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Lake Somerville - College Station, Texas, March 12 - 13, 2019

Album 2464: Lake Somerville - College Station, Texas, March 12 - 13, 2019

The image depicts two leaves of a plant exhibiting symptoms of rust disease caused by the fungus *Puccinia modiolae*. The leaf at the top left and its counterpart to the right are both displayed from the underside. The lower part of each leaf is shown in the bottom center.

Both leaves display pustules or "blister-like" eruptions filled with orange spores on their undersides, which are indicative of a rust infection. On the upper surface, the leaves show yellow-orange sunken spots that are also characteristic of this disease. These sunken spots may be difficult to discern at first glance due to their similarity in coloration to the surrounding leaf tissue.

The plant in question is identified as *Moldiola caroliniana* (Carolina bristlemallow), a common species found throughout much of North America. The image was captured near apartments on George Bush Drive in College Station, Texas, on March 13, 2019. – AI vision

🇪🇸 Descripción en español / Spanish Description

Se observaron pústulas parecidas a ampollas en la cara inferior y manchas hundidas de color naranja-amarillo en la superficie superior de las hojas del matorral espinoso de Carolina (Modiola caroliniana) causadas por el hongo Puccinia modiolae, tomada de un jardín cercano a apartamentos en George Bush Drive. College Station, Texas, 13 de marzo de 2019. La imagen muestra dos hojas de una planta que presentan síntomas de la enfermedad del royo causada por el hongo *Puccinia modiolae*. La hoja superior izquierda y su homóloga a la derecha se muestran desde la cara inferior. La parte inferior de cada hoja se muestra en el centro inferior. Ambas hojas presentan pústulas o erupciones "similares a ampollas" rellenas con esporas naranjas en su cara inferior, lo que indica una infección por royo. En la superficie superior, las hojas muestran manchas hundidas de color naranja-amarillo que también son características de esta enfermedad. Estas manchas hundidas pueden ser difíciles de discernir a simple vista debido a su similaridad en la coloración con el tejido circundante de las hojas. La planta en cuestión se identifica como *Modiola caroliniana* (matorral espinoso de Carolina), una especie común que se encuentra en gran parte de Norteamérica. La imagen fue capturada cerca de apartamentos en George Bush Drive en College Station, Texas, el 13 de marzo de 2019. – Spanish translation

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