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.

  • Growing Plant Free HD Image PNG Image
    Growing Plant Free HD Image
    Format: PNG
    Resolution: 2000x1502
    Size: 917.5KB
    Downloads: 210
  • Falling Petals Free Download PNG HD PNG Image
    Falling Petals Free Download PNG HD
    Format: PNG
    Resolution: 730x1095
    Size: 190.1KB
    Downloads: 210
  • Ice Cube HQ Image Free PNG PNG Image
    Ice Cube HQ Image Free PNG
    Format: PNG
    Resolution: 2000x1050
    Size: 720.2KB
    Downloads: 210
  • Twitter Computer Icons Free PNG HQ PNG Image
    Twitter Computer Icons Free PNG HQ
    Format: PNG
    Resolution: 1024x1024
    Size: 40.8KB
    Downloads: 210
  • Jasmine Garland Picture Download HQ PNG PNG Image
    Jasmine Garland Picture Download HQ PNG
    Format: PNG
    Resolution: 600x600
    Size: 183.3KB
    Downloads: 209
  • Soap Bubbles Picture Free HQ Image PNG Image
    Soap Bubbles Picture Free HQ Image
    Format: PNG
    Resolution: 640x627
    Size: 174.3KB
    Downloads: 209
  • Half Moon HD Free Transparent Image HD PNG Image
    Half Moon HD Free Transparent Image HD
    Format: PNG
    Resolution: 980x980
    Size: 59.2KB
    Downloads: 208
  • Falling Leaf Image Free PNG HQ PNG Image
    Falling Leaf Image Free PNG HQ
    Format: PNG
    Resolution: 1024x1143
    Size: 468.2KB
    Downloads: 208
  • Green Energy HD Free Download PNG HQ PNG Image
    Green Energy HD Free Download PNG HQ
    Format: PNG
    Resolution: 960x407
    Size: 93.0KB
    Downloads: 208
  • Ground Picture Download HQ PNG PNG Image
    Ground Picture Download HQ PNG
    Format: PNG
    Resolution: 1024x452
    Size: 327.2KB
    Downloads: 208
  • Growing Plant Free Clipart HQ PNG Image
    Growing Plant Free Clipart HQ
    Format: PNG
    Resolution: 1200x525
    Size: 229.5KB
    Downloads: 207
  • Falling Leaf Download HQ Image Free PNG PNG Image
    Falling Leaf Download HQ Image Free PNG
    Format: PNG
    Resolution: 472x349
    Size: 159.4KB
    Downloads: 207
  • Falling Leaf Download Free Image PNG Image
    Falling Leaf Download Free Image
    Format: PNG
    Resolution: 590x300
    Size: 283.9KB
    Downloads: 207
  • Soap Bubbles Images Free Transparent Image HD PNG Image
    Soap Bubbles Images Free Transparent Image HD
    Format: PNG
    Resolution: 600x600
    Size: 292.5KB
    Downloads: 207
  • Ground Download Free Transparent Image HQ PNG Image
    Ground Download Free Transparent Image HQ
    Format: PNG
    Resolution: 1024x619
    Size: 509.7KB
    Downloads: 207
  • Colored Dandelion Free HD Image PNG Image
    Colored Dandelion Free HD Image
    Format: PNG
    Resolution: 794x1005
    Size: 326.3KB
    Downloads: 207
  • Japanese Flowering Cherry Picture Free HD Image PNG Image
    Japanese Flowering Cherry Picture Free HD Image
    Format: PNG
    Resolution: 528x677
    Size: 30.1KB
    Downloads: 207
  • Falling Petals Picture Download HQ PNG PNG Image
    Falling Petals Picture Download HQ PNG
    Format: PNG
    Resolution: 1920x1080
    Size: 560.2KB
    Downloads: 206
  • Soap Bubbles Picture Free PNG HQ PNG Image
    Soap Bubbles Picture Free PNG HQ
    Format: PNG
    Resolution: 827x1024
    Size: 199.2KB
    Downloads: 206
  • Colored Dandelion HD PNG Download Free PNG Image
    Colored Dandelion HD PNG Download Free
    Format: PNG
    Resolution: 564x789
    Size: 331.5KB
    Downloads: 205

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