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.

  • Japanese Flowering Cherry HD Free Photo PNG PNG Image
    Japanese Flowering Cherry HD Free Photo PNG
    Format: PNG
    Resolution: 932x720
    Size: 218.0KB
    Downloads: 194
  • Japanese Flowering Cherry Image Free Clipart HD PNG Image
    Japanese Flowering Cherry Image Free Clipart HD
    Format: PNG
    Resolution: 682x700
    Size: 674.5KB
    Downloads: 242
  • Japanese Flowering Cherry Image HD Image Free PNG PNG Image
    Japanese Flowering Cherry Image HD Image Free PNG
    Format: PNG
    Resolution: 650x651
    Size: 337.7KB
    Downloads: 309
  • Japanese Flowering Cherry Picture PNG Download Free PNG Image
    Japanese Flowering Cherry Picture PNG Download Free
    Format: PNG
    Resolution: 950x897
    Size: 233.4KB
    Downloads: 310
  • Japanese Flowering Cherry Download Free Image PNG Image
    Japanese Flowering Cherry Download Free Image
    Format: PNG
    Resolution: 2714x2714
    Size: 2.4MB
    Downloads: 337
  • Japanese Flowering Cherry Images Download Free Image PNG Image
    Japanese Flowering Cherry Images Download Free Image
    Format: PNG
    Resolution: 1600x800
    Size: 300.3KB
    Downloads: 269
  • Twitter Computer Icons Free PNG HQ PNG Image
    Twitter Computer Icons Free PNG HQ
    Format: PNG
    Resolution: 1024x1024
    Size: 40.8KB
    Downloads: 210
  • Grape Vine Leaf Art PNG Download Free PNG Image
    Grape Vine Leaf Art PNG Download Free
    Format: PNG
    Resolution: 512x160
    Size: 67.1KB
    Downloads: 93
  • Grape Vine Leaf Art PNG File HD PNG Image
    Grape Vine Leaf Art PNG File HD
    Format: PNG
    Resolution: 708x750
    Size: 198.2KB
    Downloads: 68
  • Vine Leaf Grape Bunch Free Clipart HQ PNG Image
    Vine Leaf Grape Bunch Free Clipart HQ
    Format: PNG
    Resolution: 500x488
    Size: 298.1KB
    Downloads: 86
  • Vine Leaf Grape Bunch Free HD Image PNG Image
    Vine Leaf Grape Bunch Free HD Image
    Format: PNG
    Resolution: 886x1135
    Size: 204.2KB
    Downloads: 52
  • Vine Leaf Grape Bunch Free Clipart HQ PNG Image
    Vine Leaf Grape Bunch Free Clipart HQ
    Format: PNG
    Resolution: 1559x771
    Size: 472.3KB
    Downloads: 93
  • Fresh Green Leafs PNG Free Photo PNG Image
    Fresh Green Leafs PNG Free Photo
    Format: PNG
    Resolution: 1087x988
    Size: 148.9KB
    Downloads: 91
  • Fresh Green Leafs Free Transparent Image HQ PNG Image
    Fresh Green Leafs Free Transparent Image HQ
    Format: PNG
    Resolution: 1369x1049
    Size: 1.4MB
    Downloads: 80
  • Vine Leaf Grape Free Clipart HD PNG Image
    Vine Leaf Grape Free Clipart HD
    Format: PNG
    Resolution: 1321x1787
    Size: 575.0KB
    Downloads: 97
  • Vine Leaf Grape Free Transparent Image HD PNG Image
    Vine Leaf Grape Free Transparent Image HD
    Format: PNG
    Resolution: 590x346
    Size: 90.7KB
    Downloads: 98
  • Green Leafs Free Transparent Image HD PNG Image
    Green Leafs Free Transparent Image HD
    Format: PNG
    Resolution: 796x1456
    Size: 290.9KB
    Downloads: 48
  • Green Leafs Free HQ Image PNG Image
    Green Leafs Free HQ Image
    Format: PNG
    Resolution: 1600x1138
    Size: 1.6MB
    Downloads: 54
  • Green Organic Leafs Free Download PNG HD PNG Image
    Green Organic Leafs Free Download PNG HD
    Format: PNG
    Resolution: 1006x366
    Size: 280.7KB
    Downloads: 48
  • Green Organic Leafs Download Free Image PNG Image
    Green Organic Leafs Download Free Image
    Format: PNG
    Resolution: 1700x1246
    Size: 2.0MB
    Downloads: 90

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