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.

  • Vine Leaf Grape Free Download PNG HD PNG Image
    Vine Leaf Grape Free Download PNG HD
    Format: PNG
    Resolution: 2000x1140
    Size: 895.5KB
    Downloads: 77
  • Vine Leaf Grape Free HD Image PNG Image
    Vine Leaf Grape Free HD Image
    Format: PNG
    Resolution: 1257x875
    Size: 995.8KB
    Downloads: 80
  • Green Leafs Free HD Image PNG Image
    Green Leafs Free HD Image
    Format: PNG
    Resolution: 1885x2257
    Size: 82.5KB
    Downloads: 100
  • Green Leafs PNG Download Free PNG Image
    Green Leafs PNG Download Free
    Format: PNG
    Resolution: 512x384
    Size: 66.9KB
    Downloads: 51
  • Photos Green Leafs Free Transparent Image HQ PNG Image
    Photos Green Leafs Free Transparent Image HQ
    Format: PNG
    Resolution: 1600x1200
    Size: 593.1KB
    Downloads: 49
  • Green Leafs PNG Free Photo PNG Image
    Green Leafs PNG Free Photo
    Format: PNG
    Resolution: 3376x3516
    Size: 3.5MB
    Downloads: 79
  • Green Leafs PNG Free Photo PNG Image
    Green Leafs PNG Free Photo
    Format: PNG
    Resolution: 2572x1662
    Size: 2.7MB
    Downloads: 92
  • Green Organic Leafs Free Photo PNG Image
    Green Organic Leafs Free Photo
    Format: PNG
    Resolution: 820x659
    Size: 498.8KB
    Downloads: 87
  • Green Organic Leafs Free Clipart HQ PNG Image
    Green Organic Leafs Free Clipart HQ
    Format: PNG
    Resolution: 670x600
    Size: 467.5KB
    Downloads: 63
  • Green Organic Leafs Free Transparent Image HQ PNG Image
    Green Organic Leafs Free Transparent Image HQ
    Format: PNG
    Resolution: 3528x2225
    Size: 5.5MB
    Downloads: 74
  • Vector Green Leafs Download HQ PNG Image
    Vector Green Leafs Download HQ
    Format: PNG
    Resolution: 1248x1248
    Size: 449.3KB
    Downloads: 76
  • Vector Green Leafs Free Transparent Image HD PNG Image
    Vector Green Leafs Free Transparent Image HD
    Format: PNG
    Resolution: 2600x1922
    Size: 3.0MB
    Downloads: 72
  • Vector Green Leafs HQ Image Free PNG Image
    Vector Green Leafs HQ Image Free
    Format: PNG
    Resolution: 512x512
    Size: 124.1KB
    Downloads: 79
  • Leaf Transparent Background PNG Image
    Leaf Transparent Background
    Format: PNG
    Resolution: 1885x2257
    Size: 181.6KB
    Downloads: 908
  • Green Leaf PNG Free Photo PNG Image
    Green Leaf PNG Free Photo
    Format: PNG
    Resolution: 975x1084
    Size: 322.1KB
    Downloads: 587
  • Green Leaf HD Download HQ PNG PNG Image
    Green Leaf HD Download HQ PNG
    Format: PNG
    Resolution: 960x403
    Size: 387.5KB
    Downloads: 250
  • Green Leaf Photos HD Image Free PNG PNG Image
    Green Leaf Photos HD Image Free PNG
    Format: PNG
    Resolution: 852x480
    Size: 240.3KB
    Downloads: 298
  • Green Leaf Free PNG HQ PNG Image
    Green Leaf Free PNG HQ
    Format: PNG
    Resolution: 800x600
    Size: 605.4KB
    Downloads: 531
  • Green Leaf Picture Free PNG HQ PNG Image
    Green Leaf Picture Free PNG HQ
    Format: PNG
    Resolution: 800x600
    Size: 18.5KB
    Downloads: 360
  • Green Leaf Image Free Photo PNG PNG Image
    Green Leaf Image Free Photo PNG
    Format: PNG
    Resolution: 636x720
    Size: 461.2KB
    Downloads: 405

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