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.

  • Gardening Free Transparent Image HQ PNG Image
    Gardening Free Transparent Image HQ
    Format: PNG
    Resolution: 512x512
    Size: 17.3KB
    Downloads: 192
  • Leaf Free Download PNG Image
    Leaf Free Download
    Format: PNG
    Resolution: 1376x1600
    Size: 2.3MB
    Downloads: 613
  • Ice Cube Free Download PNG HD PNG Image
    Ice Cube Free Download PNG HD
    Format: PNG
    Resolution: 1920x1080
    Size: 1.1MB
    Downloads: 280
  • Ice Cube Download Free Image PNG Image
    Ice Cube Download Free Image
    Format: PNG
    Resolution: 1073x360
    Size: 618.3KB
    Downloads: 241
  • Soap Bubbles HD Download HD PNG PNG Image
    Soap Bubbles HD Download HD PNG
    Format: PNG
    Resolution: 500x500
    Size: 78.5KB
    Downloads: 191
  • Falling Leaf PNG Image High Quality PNG Image
    Falling Leaf PNG Image High Quality
    Format: PNG
    Resolution: 650x728
    Size: 93.8KB
    Downloads: 215
  • Soap Bubbles Image Free HD Image PNG Image
    Soap Bubbles Image Free HD Image
    Format: PNG
    Resolution: 4248x3840
    Size: 3.3MB
    Downloads: 339
  • Green Leaf Image Free PNG HQ PNG Image
    Green Leaf Image Free PNG HQ
    Format: PNG
    Resolution: 948x624
    Size: 351.4KB
    Downloads: 248
  • Green Leaf Free Transparent Image HQ PNG Image
    Green Leaf Free Transparent Image HQ
    Format: PNG
    Resolution: 600x600
    Size: 21.4KB
    Downloads: 298
  • Green Energy Free HD Image PNG Image
    Green Energy Free HD Image
    Format: PNG
    Resolution: 875x611
    Size: 42.3KB
    Downloads: 186
  • Gardening Images Free Download PNG HQ PNG Image
    Gardening Images Free Download PNG HQ
    Format: PNG
    Resolution: 514x1024
    Size: 418.5KB
    Downloads: 186
  • Falling Leaf Image Free Clipart HD PNG Image
    Falling Leaf Image Free Clipart HD
    Format: PNG
    Resolution: 1920x1080
    Size: 1.4MB
    Downloads: 244
  • Ground Image Free HD Image PNG Image
    Ground Image Free HD Image
    Format: PNG
    Resolution: 5000x2235
    Size: 927.8KB
    Downloads: 202
  • Green Leaf Picture PNG Download Free PNG Image
    Green Leaf Picture PNG Download Free
    Format: PNG
    Resolution: 1280x439
    Size: 465.9KB
    Downloads: 280
  • Ground Image HD Image Free PNG PNG Image
    Ground Image HD Image Free PNG
    Format: PNG
    Resolution: 1170x400
    Size: 357.7KB
    Downloads: 214
  • Ice Cube Photos Free Download PNG HD PNG Image
    Ice Cube Photos Free Download PNG HD
    Format: PNG
    Resolution: 612x612
    Size: 289.2KB
    Downloads: 579
  • Ice Cube HD Free Download PNG HQ PNG Image
    Ice Cube HD Free Download PNG HQ
    Format: PNG
    Resolution: 749x720
    Size: 120.5KB
    Downloads: 239
  • Colored Dandelion Download HQ PNG PNG Image
    Colored Dandelion Download HQ PNG
    Format: PNG
    Resolution: 600x601
    Size: 381.1KB
    Downloads: 275
  • Ice Cube Picture Free Transparent Image HD PNG Image
    Ice Cube Picture Free Transparent Image HD
    Format: PNG
    Resolution: 952x1074
    Size: 146.8KB
    Downloads: 202
  • Growing Plant Free Download Image PNG Image
    Growing Plant Free Download Image
    Format: PNG
    Resolution: 512x512
    Size: 9.2KB
    Downloads: 194

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