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 Image Download HD PNG PNG Image
    Yellow Dandelion Image Download HD PNG
    Format: PNG
    Resolution: 500x481
    Size: 185.3KB
    Downloads: 218
  • Colored Dandelion Download PNG Download Free PNG Image
    Colored Dandelion Download PNG Download Free
    Format: PNG
    Resolution: 564x836
    Size: 263.1KB
    Downloads: 218
  • Dandelion Free HQ Image PNG Image
    Dandelion Free HQ Image
    Format: PNG
    Resolution: 800x600
    Size: 388.7KB
    Downloads: 217
  • Green Energy Free PNG HQ PNG Image
    Green Energy Free PNG HQ
    Format: PNG
    Resolution: 576x218
    Size: 10.8KB
    Downloads: 216
  • Jasmine Garland Photos PNG File HD PNG Image
    Jasmine Garland Photos PNG File HD
    Format: PNG
    Resolution: 450x600
    Size: 119.5KB
    Downloads: 216
  • Soap Bubbles HD Free Clipart HD PNG Image
    Soap Bubbles HD Free Clipart HD
    Format: PNG
    Resolution: 1024x768
    Size: 157.2KB
    Downloads: 216
  • Growing Plant HD PNG Free Photo PNG Image
    Growing Plant HD PNG Free Photo
    Format: PNG
    Resolution: 420x205
    Size: 25.4KB
    Downloads: 215
  • Falling Leaf PNG Image High Quality PNG Image
    Falling Leaf PNG Image High Quality
    Format: PNG
    Resolution: 650x728
    Size: 93.8KB
    Downloads: 215
  • Gardening Picture PNG Download Free PNG Image
    Gardening Picture PNG Download Free
    Format: PNG
    Resolution: 550x424
    Size: 207.4KB
    Downloads: 215
  • Ground Image HD Image Free PNG PNG Image
    Ground Image HD Image Free PNG
    Format: PNG
    Resolution: 1170x400
    Size: 357.7KB
    Downloads: 214
  • Growing Plant Free HD Image PNG Image
    Growing Plant Free HD Image
    Format: PNG
    Resolution: 512x512
    Size: 7.2KB
    Downloads: 213
  • Icicles PNG Download Free PNG Image
    Icicles PNG Download Free
    Format: PNG
    Resolution: 4999x3115
    Size: 3.4MB
    Downloads: 213
  • Ice Cube Image Free Download PNG HQ PNG Image
    Ice Cube Image Free Download PNG HQ
    Format: PNG
    Resolution: 553x500
    Size: 175.3KB
    Downloads: 213
  • Ice Cube Free PNG HQ PNG Image
    Ice Cube Free PNG HQ
    Format: PNG
    Resolution: 525x284
    Size: 174.3KB
    Downloads: 212
  • Falling Leaf HD Free Download PNG HQ PNG Image
    Falling Leaf HD Free Download PNG HQ
    Format: PNG
    Resolution: 889x899
    Size: 128.8KB
    Downloads: 212
  • Falling Petals Free HQ Image PNG Image
    Falling Petals Free HQ Image
    Format: PNG
    Resolution: 894x894
    Size: 842.2KB
    Downloads: 212
  • Gardening PNG File HD PNG Image
    Gardening PNG File HD
    Format: PNG
    Resolution: 558x548
    Size: 74.6KB
    Downloads: 212
  • Half Moon Download PNG Image High Quality PNG Image
    Half Moon Download PNG Image High Quality
    Format: PNG
    Resolution: 450x450
    Size: 28.5KB
    Downloads: 211
  • Dandelion Picture Free HD Image PNG Image
    Dandelion Picture Free HD Image
    Format: PNG
    Resolution: 1280x1047
    Size: 225.4KB
    Downloads: 211
  • Green Energy Image Free Download Image PNG Image
    Green Energy Image Free Download Image
    Format: PNG
    Resolution: 559x565
    Size: 405.3KB
    Downloads: 211

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