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.

  • Yellow Dandelion Free PNG HQ PNG Image
    Yellow Dandelion Free PNG HQ
    Format: PNG
    Resolution: 624x629
    Size: 167.7KB
    Downloads: 200
  • Yellow Dandelion Free Clipart HQ PNG Image
    Yellow Dandelion Free Clipart HQ
    Format: PNG
    Resolution: 936x853
    Size: 781.8KB
    Downloads: 200
  • Ground PNG Image High Quality PNG Image
    Ground PNG Image High Quality
    Format: PNG
    Resolution: 1063x203
    Size: 72.7KB
    Downloads: 199
  • Dandelion Image PNG Download Free PNG Image
    Dandelion Image PNG Download Free
    Format: PNG
    Resolution: 600x600
    Size: 89.5KB
    Downloads: 199
  • Dandelion Free Photo PNG PNG Image
    Dandelion Free Photo PNG
    Format: PNG
    Resolution: 1200x900
    Size: 495.3KB
    Downloads: 199
  • Soap Bubbles Image Free PNG HQ PNG Image
    Soap Bubbles Image Free PNG HQ
    Format: PNG
    Resolution: 735x720
    Size: 127.5KB
    Downloads: 198
  • Green Energy Download Image PNG Free Photo PNG Image
    Green Energy Download Image PNG Free Photo
    Format: PNG
    Resolution: 440x720
    Size: 58.0KB
    Downloads: 198
  • Green Energy Download Free Clipart HQ PNG Image
    Green Energy Download Free Clipart HQ
    Format: PNG
    Resolution: 500x500
    Size: 86.1KB
    Downloads: 198
  • Ground HD PNG Image High Quality PNG Image
    Ground HD PNG Image High Quality
    Format: PNG
    Resolution: 1024x210
    Size: 29.0KB
    Downloads: 198
  • Ice Cube Image HD Image Free PNG PNG Image
    Ice Cube Image HD Image Free PNG
    Format: PNG
    Resolution: 500x347
    Size: 232.5KB
    Downloads: 197
  • Yellow Dandelion Free Clipart HD PNG Image
    Yellow Dandelion Free Clipart HD
    Format: PNG
    Resolution: 2400x2400
    Size: 567.1KB
    Downloads: 197
  • Icicles Download PNG Image High Quality PNG Image
    Icicles Download PNG Image High Quality
    Format: PNG
    Resolution: 1200x848
    Size: 528.5KB
    Downloads: 196
  • Gardening Image Free Download PNG HQ PNG Image
    Gardening Image Free Download PNG HQ
    Format: PNG
    Resolution: 460x346
    Size: 183.8KB
    Downloads: 196
  • Japanese Flowering Cherry HQ Image Free PNG PNG Image
    Japanese Flowering Cherry HQ Image Free PNG
    Format: PNG
    Resolution: 894x894
    Size: 793.7KB
    Downloads: 196
  • Jasmine Garland HD Download HD PNG PNG Image
    Jasmine Garland HD Download HD PNG
    Format: PNG
    Resolution: 600x600
    Size: 163.1KB
    Downloads: 195
  • Dandelion Download Download Free Image PNG Image
    Dandelion Download Download Free Image
    Format: PNG
    Resolution: 960x720
    Size: 634.7KB
    Downloads: 195
  • Growing Plant Free Download Image PNG Image
    Growing Plant Free Download Image
    Format: PNG
    Resolution: 512x512
    Size: 9.2KB
    Downloads: 194
  • Jasmine Garland Download Free Download Image PNG Image
    Jasmine Garland Download Free Download Image
    Format: PNG
    Resolution: 600x600
    Size: 185.4KB
    Downloads: 194
  • Green Energy Image Free HQ Image PNG Image
    Green Energy Image Free HQ Image
    Format: PNG
    Resolution: 512x512
    Size: 15.4KB
    Downloads: 194
  • Dandelion Free HD Image PNG Image
    Dandelion Free HD Image
    Format: PNG
    Resolution: 600x600
    Size: 48.5KB
    Downloads: 194

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