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Pycnia of Juniper-hawthorn rust fungus...in Sam Houston National Forest. Texas  
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Pycnia of Juniper-hawthorn rust fungus (Gymnosporangium globosum) under a microscope in KOH, from upper surface of leaves of littlehip hawthorn (Crataegus spathulata), collected on Richards Loop Trail in Sam Houston National Forest. Texas, July 23, 2023

#3410-18 Thumbnail 3410-18: Pycnia of Juniper-hawthorn rust fungus...National Forest. Texas Show full size picture

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Similar   Thumbnail of picture 3410-17: Tissues infected by Juniper-hawthorn rust fungus (Gymnosporangium ... Sam Houston National Forest. Texas, July 23, 2023 Thumbnail of picture 3410-15: Leaves of littlehip hawthorn (Crataegus spathulata) with pycnia of ... Sam Houston National Forest. Texas, July 23, 2023 Thumbnail of picture 3410-16: Pycnia of Juniper-hawthorn rust fungus (Gymnosporangium globosum) on ... Sam Houston National Forest. Texas, July 23, 2023 Thumbnail of picture 3410-12: Juniper-hawthorn rust fungus (Gymnosporangium globosum) on littlehip ... Sam Houston National Forest. Texas, July 23, 2023 Thumbnail of picture 3510-11: Cedar-hawthorn rust fungus (Gymnosporangium globosum) on littlehip ... Sam Houston National Forest. Texas, April 13, 2024
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The microscopic view of the Pycnia of Juniper-hawthorn rust fungus (Gymnosporangium globosum) on the upper surface of leaves of littlehip hawthorn (Crataegus spathulata) from Richards Loop Trail in Sam Houston National Forest, Texas, reveals intricate structures under KOH examination. The image was captured on July 23, 2023. – generated by AI

The microscopic image shows a cluster of pycnia, the fruiting bodies of Gymnosporangium globosum, the fungus responsible for Juniper-hawthorn rust. The pycnia are brown and elongated, with one larger structure visible in the center-right of the image.

**Image Details**

* **Background**: The background is white.
* **Focal Point**: A cluster of pycnia from an upper leaf surface of a littlehip hawthorn (Crataegus spathulata) collected on Richards Loop Trail in Sam Houston National Forest, Texas.
* **Magnification**: The image appears to be magnified approximately 400x.

**Analysis**

The brown coloration and elongated shape of the pycnia are consistent with Gymnosporangium globosum. This species is known to infect juniper and hawthorn plants in North America, causing rust disease. – AI vision

La roya del pino-melocotón causada por el hongo Gymnosporangium globosum bajo un microscopio en KOH, de la superficie superior de las hojas de melocotonero pocohip (Crataegus spathulata), recolectadas en el Richards Loop Trail en el Bosque Nacional Sam Houston. Texas, 23 de julio de 2023. La imagen microscópica muestra un racimo de Pycnia, los cuerpos fructíferos de Gymnosporangium globosum, el hongo responsable de la roya del pino-melocotón. Las Pycnia son marrones y alargadas, con una estructura más grande visible en el centro derecho de la imagen. **Detalles de la imagen** * **Fondo**: El fondo es blanco. * **Punto focal**: Un racimo de Pycnia de una superficie superior de hoja de melocotonero pocohip (Crataegus spathulata) recogido en el Richards Loop Trail en el Bosque Nacional Sam Houston, Texas. * **Agrandamiento**: La imagen aparece ampliada aproximadamente 400x. **Análisis** La coloración marrón y la forma alargada de las Pycnia son consistentes con Gymnosporangium globosum. Esta especie es conocida por infectar plantas de pino y melocotón en Norteamérica, causando enfermedades de roya. – Spanish translation


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