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.

  • Pic Grape Vine Leaf Art PNG Image
    Pic Grape Vine Leaf Art
    Format: PNG
    Resolution: 1000x960
    Size: 117.8KB
    Downloads: 78
  • Vine Leaf Grape Photos Free Transparent Image HQ PNG Image
    Vine Leaf Grape Photos Free Transparent Image HQ
    Format: PNG
    Resolution: 2363x3097
    Size: 1.5MB
    Downloads: 78
  • Grape Vine Leaf Art HQ Image Free PNG Image
    Grape Vine Leaf Art HQ Image Free
    Format: PNG
    Resolution: 977x750
    Size: 502.5KB
    Downloads: 77
  • 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
  • Vector Green Leafs Download HQ PNG Image
    Vector Green Leafs Download HQ
    Format: PNG
    Resolution: 1248x1248
    Size: 449.3KB
    Downloads: 76
  • 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 Free Transparent Image HD PNG Image
    Vector Green Leafs Free Transparent Image HD
    Format: PNG
    Resolution: 2600x1922
    Size: 3.0MB
    Downloads: 72
  • Fresh Green Leafs PNG Download Free PNG Image
    Fresh Green Leafs PNG Download Free
    Format: PNG
    Resolution: 600x327
    Size: 40.1KB
    Downloads: 71
  • Vine Leaf Grape Photos Bunch PNG Image
    Vine Leaf Grape Photos Bunch
    Format: PNG
    Resolution: 607x990
    Size: 244.7KB
    Downloads: 70
  • 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
  • Fresh Green Leafs Free Download Image PNG Image
    Fresh Green Leafs Free Download Image
    Format: PNG
    Resolution: 948x624
    Size: 351.4KB
    Downloads: 66
  • Photos Vector Green Leafs PNG Download Free PNG Image
    Photos Vector Green Leafs PNG Download Free
    Format: PNG
    Resolution: 1920x1636
    Size: 3.6MB
    Downloads: 65
  • Fresh Pic Green Leafs HQ Image Free PNG Image
    Fresh Pic Green Leafs HQ Image Free
    Format: PNG
    Resolution: 2600x2600
    Size: 311.1KB
    Downloads: 64
  • Vine Leaf Grape PNG Free Photo PNG Image
    Vine Leaf Grape PNG Free Photo
    Format: PNG
    Resolution: 850x752
    Size: 302.8KB
    Downloads: 64
  • Grape Vine Leaf Art Download Free Image PNG Image
    Grape Vine Leaf Art Download Free Image
    Format: PNG
    Resolution: 800x704
    Size: 59.7KB
    Downloads: 63
  • Green Organic Leafs Free Clipart HQ PNG Image
    Green Organic Leafs Free Clipart HQ
    Format: PNG
    Resolution: 670x600
    Size: 467.5KB
    Downloads: 63
  • Pic Vine Leaf Grape Free PNG HQ PNG Image
    Pic Vine Leaf Grape Free PNG HQ
    Format: PNG
    Resolution: 1024x1024
    Size: 264.3KB
    Downloads: 60
  • Fresh Green Leafs Free Transparent Image HD PNG Image
    Fresh Green Leafs Free Transparent Image HD
    Format: PNG
    Resolution: 1014x676
    Size: 435.6KB
    Downloads: 57
  • Pic Vector Green Leafs PNG Image High Quality PNG Image
    Pic Vector Green Leafs PNG Image High Quality
    Format: PNG
    Resolution: 2048x2048
    Size: 178.3KB
    Downloads: 55
  • Green Leafs Free HQ Image PNG Image
    Green Leafs Free HQ Image
    Format: PNG
    Resolution: 1600x1138
    Size: 1.6MB
    Downloads: 54

RELATED CATEGORIES

Leaf PNG Category

Leaf

Wood PNG Category

Wood

Leaf PNG Category

Leaf

Lilac PNG Category

Lilac

Flower PNG Category

Flower

Watermelon PNG Category

Watermelon

Plant PNG Category

Plant

Leaf PNG Category

Leaf

Wood PNG Category

Wood

Plant PNG Category

Plant