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Pear leaf (upper side) with Pear rust - disease caused by Gymnosporangium sabinae fungus, close up, white background

Plum rust disease on a leaves in the plum orchard

A leaf miner is any one of numerous species of insects in which the larval stage lives in, and eats, the leaf tissue of plants.

Extreme close-up of a leaf structure (veins).

Larvae, nymphs of leafhoppers, Cicadellidae on the underside of apple tree leaves in the garden. A pest that sucks plant sap and transmits plant diseases.

Powdery Mildew on green leaf - fungal disease on tree.

Macro image of an eucalyptus leaf with Mycosphaerellaceae

Lesions caused by alternaria fungus on diseased apple leaf

Sick apple tree leaf with with parasitic Phragmidium fungus colonies. Isolated on white studio macro shot

Macrophotography, close-up of a dry plant leaf with a colorful background

Texture of a leaf in high magnification with backlight

Pear leaf showing fungal pear rust infection, isolated on a white background.

Close-up of an eucalyptus leaf with Mycosphaerellaceae

Rose plant fungal disease; close-up of an affected rose leaf

The veins are the vascular tissue of the leaf and are located in the spongy layer of the mesophyll. The pattern of the veins is called venation. They were once thought to be typical examples of pattern formation through ramification, but they may instead exemplify a pattern formed in a stress tensor field. A vein is made up of a vascular bundle. At the core of each bundle are clusters of two distinct types of conducting cells: xylem and phloem.

Red rust of stone fruit, rust stone fruit or plum rust. A fungal disease of plum caused by Tranzschelia pruni-spinosae or T. discolor.

$The beauty of the fall colors, a mixture of brown, purple, red, orange and yellow is the result of chemical processes that take place in the tree as the seasons change and the leaves stop their food-making process. The chlorophyll breaks down, the green color disappears, and the yellow to orange colors become visible and give the leaves part of their fall splendor.All these colors are due to the mixing of varying amounts of the chlorophyll residue and other pigments in the leaf during the fall season. The length of this leaf is 10cm over all. Switzerland, 47°11'49.1\$

Caterpillar Eaten Leaf Close Up Abstract

Closed up bitten green leaf - black background.

Apricot leaves in Cieza Murcia, the pantry of Europe

Beautiful plant close-up on a white background

Grape Leaf Infected by Fungal Disease Downy Mildew. Plasmopara viticola. Macro. Close-up.

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