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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    Growing Plant Free HD Image
    Format: PNG
    Resolution: 2000x1502
    Size: 917.5KB
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    Growing Plant Free Clipart HQ
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    Size: 308.9KB
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    Half Moon Free Clipart HD
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    Resolution: 512x512
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    Half Moon Download PNG Image High Quality
    Format: PNG
    Resolution: 450x450
    Size: 28.5KB
    Downloads: 211
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    Half Moon HD Free Transparent Image HD
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    Resolution: 980x980
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    Resolution: 650x500
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    Resolution: 668x720
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    Half Moon Photos Free Clipart HQ
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    Size: 65.2KB
    Downloads: 203
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    Half Moon PNG Download Free
    Format: PNG
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    Size: 39.6KB
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    Half Moon Picture Free Download Image
    Format: PNG
    Resolution: 512x512
    Size: 11.5KB
    Downloads: 204
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    Format: PNG
    Resolution: 1500x1500
    Size: 836.2KB
    Downloads: 369
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    Format: PNG
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    Size: 72.9KB
    Downloads: 222
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    Resolution: 918x980
    Size: 29.3KB
    Downloads: 219
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    Half Moon Free Download Image
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    Size: 486.4KB
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    Icicles Free HQ Image
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    Size: 1.9MB
    Downloads: 183
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    Icicles PNG File HD
    Format: PNG
    Resolution: 900x476
    Size: 180.6KB
    Downloads: 190
  • Icicles Download PNG Image High Quality PNG Image
    Icicles Download PNG Image High Quality
    Format: PNG
    Resolution: 1200x848
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    Resolution: 4055x6000
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    Downloads: 238
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