Underside of a leaf of apple (mandrake, Podophyllum ...

The image presents a close-up view of the underside of a May apple leaf, showcasing brown teleutospores of the mayapple rust fungus Allodus podophylli (Puccinia podophylli). The leaf exhibits prominent veins and a light green color with darker green midribs.

**Key Features:**

* **Teleutospores:** Small, brown, oval-shaped structures scattered across the leaf surface.
* **Leaf Structure:** Prominent veins visible on the underside of the leaf, with a lighter green hue and darker green midribs.
* **Background:** Darker area in the background likely represents the forest floor or surrounding vegetation.

**Context:**

The image appears to have been captured during a hike in Sam Houston National Forest, Texas. The presence of teleutospores suggests that the May apple plant is infected with the mayapple rust fungus, which is a common fungal disease affecting plants in this region. – AI vision