Underside of a leaf of May apple (Podophyllum peltatum) with aecia of mayapple rust fungus (Allodus podophylli, Puccinia podophylli) on Caney Creek Trail (Little Lake Creek Loop Trail) in Sam Houston National Forest north from Montgomery. Texas

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Sam Houston Forest, Texas, March 4, 2023

Album 3353: Sam Houston Forest, Texas, March 4, 2023

This image presents a detailed view of the underside of May apple leaf, specifically showcasing its intricate features and growth patterns.

**Leaf Characteristics**

* The leaf is characterized by deep green coloration.
* Its surface exhibits prominent veins that branch out from the center towards the edges.
* The margins are slightly wavy, indicating the leaf's natural curvature.

**Rust Fungus Growth**

* In contrast to the predominantly green hue of the leaf, the rust fungus growth appears as bright orange-red spots scattered across the underside.
* These spots are irregularly shaped and vary in size, ranging from small pinhead-sized dots to larger patches that cover a significant portion of the leaf surface.

**Leaf Edge and Veins**

* The edges of the leaf are serrated, with small teeth visible along the margin.
* The veins on the leaf's underside appear thicker than those on the top side, which is likely due to the increased density of leaf cells in this area.

**Overall Impression**

This close-up view provides a fascinating glimpse into the intricate details of May apple leaves and their unique interactions with rust fungus growth. – AI vision

🇪🇸 Descripción en español / Spanish Description

El lado inferior de una hoja de manzana de mayo (Podophyllum peltatum) con aecia del hongo roya de la manzana de mayo (Allodus podophylli, Puccinia podophylli) en el sendero Caney Creek (Sendero Little Lake Creek Loop) en el Bosque Nacional Sam Houston al norte de Montgomery. Texas, 4 de marzo del 2023. Esta imagen presenta una vista detallada del lado inferior de la hoja de manzana de mayo, destacando sus características intrincadas y patrones de crecimiento. **Características de la hoja** * La hoja se caracteriza por su coloración verde oscuro. * Su superficie muestra vetas prominentes que se ramifican desde el centro hacia los bordes. * Los márgenes son ligeramente ondulados, lo que indica la curvatura natural de la hoja. **Crecimiento del hongo roya** * A diferencia del tono predominantemente verde de la hoja, el crecimiento del hongo roya aparece como manchas de color naranja-rojo brillante dispersadas por el lado inferior. * Estas manchas tienen formas irregulares y varían en tamaño, desde pequeños puntos de tamaño de un pinchazo hasta parches más grandes que cubren una parte significativa de la superficie de la hoja. **Borde y Venas de las hojas** * Los bordes de la hoja están serrados, con pequeños dientes visibles a lo largo del margen. * Las venas en el lado inferior de la hoja parecen más gruesas que las del lado superior, lo que se debe probablemente al mayor aumento de células foliares en esa área. **Impresión General** Esta vista cercana proporciona una fascinante mirada a los detalles intrincados de las hojas de la manzana de mayo y su interacción única con el crecimiento del hongo roya. – Spanish translation

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