A leaf is the principal lateral appendage of the stem which is in turn part of a plant. Hence a leave is an organ of a vascular plant. The shoot is formed together by the stem and the leaves. Foliage is a term used for referring leaves collectively. As is one must have often heard, 'autumn foliage'. The characteristic of this plant organ is that it is a dorsoventrally flattened organ, usually borne above the ground, and specialised for its function of photosynthesis. Photosynthesis is the process of converting the intake of carbon dioxide into oxygen. The primary photosynthesis tissue, in most leaves, known as palisade mesophyll, is located on the upper side of the blade or lamina of the leaf. However there are still exceptions, like in some species, including the mature foliage of Eucalypts, palisade mesophyll is present on both sides and these leaves are said to be isobilateral.
Many leaves have a distinct upper surface, also known as adaxial and distinct lower surface called abaxial which differ in colour, the number of stomata ( stomata are the pores present on leaves that intake and output gases), hairiness, the amount and structure of epicuticular wax and other features. When talking about the colour of leaves, they are mostly green, but there are always exceptions.

In this sub category you can download free PNG images: Leaf Nature. In this category "Leaf" we have 290 free PNG images with transparent background.

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    Ground Photos PNG Free Photo
    Format: PNG
    Resolution: 600x252
    Size: 221.3KB
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    Downloads: 222
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    Format: PNG
    Resolution: 1024x452
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    Downloads: 208
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    Size: 1.4MB
    Downloads: 238
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    Ground Free HQ Image
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    Resolution: 979x816
    Size: 666.4KB
    Downloads: 249
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    Ground PNG Image High Quality
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    Resolution: 1063x203
    Size: 72.7KB
    Downloads: 199
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    Ground Free Photo PNG
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    Resolution: 1164x596
    Size: 42.4KB
    Downloads: 192
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    Resolution: 525x284
    Size: 174.3KB
    Downloads: 212
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    Format: PNG
    Resolution: 1920x1080
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    Resolution: 600x600
    Size: 134.0KB
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    Resolution: 749x720
    Size: 120.5KB
    Downloads: 239
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    Resolution: 553x500
    Size: 175.3KB
    Downloads: 213
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    Resolution: 550x367
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    Resolution: 612x612
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    Size: 268.1KB
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    Ice Cube Picture Free Download Image
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    Size: 122.6KB
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    Size: 232.5KB
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    Ice Cube Picture Free Transparent Image HD
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    Resolution: 952x1074
    Size: 146.8KB
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    Resolution: 2000x1050
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