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 Download Free Image PNG Image
    Yellow Dandelion Download Free Image
    Format: PNG
    Resolution: 512x512
    Size: 219.0KB
    Downloads: 194
  • Japanese Flowering Cherry HD Free Photo PNG PNG Image
    Japanese Flowering Cherry HD Free Photo PNG
    Format: PNG
    Resolution: 932x720
    Size: 218.0KB
    Downloads: 194
  • Falling Leaf HQ Image Free PNG PNG Image
    Falling Leaf HQ Image Free PNG
    Format: PNG
    Resolution: 545x472
    Size: 179.7KB
    Downloads: 193
  • Green Energy Free Clipart HQ PNG Image
    Green Energy Free Clipart HQ
    Format: PNG
    Resolution: 512x512
    Size: 11.1KB
    Downloads: 193
  • Green Energy HD Free Photo PNG PNG Image
    Green Energy HD Free Photo PNG
    Format: PNG
    Resolution: 874x525
    Size: 36.3KB
    Downloads: 193
  • Jasmine Garland Free Clipart HD PNG Image
    Jasmine Garland Free Clipart HD
    Format: PNG
    Resolution: 600x600
    Size: 141.9KB
    Downloads: 192
  • Gardening Free Transparent Image HQ PNG Image
    Gardening Free Transparent Image HQ
    Format: PNG
    Resolution: 512x512
    Size: 17.3KB
    Downloads: 192
  • Ground Free Photo PNG PNG Image
    Ground Free Photo PNG
    Format: PNG
    Resolution: 1164x596
    Size: 42.4KB
    Downloads: 192
  • Soap Bubbles HD Download HD PNG PNG Image
    Soap Bubbles HD Download HD PNG
    Format: PNG
    Resolution: 500x500
    Size: 78.5KB
    Downloads: 191
  • Green Energy HQ Image Free PNG PNG Image
    Green Energy HQ Image Free PNG
    Format: PNG
    Resolution: 3000x3000
    Size: 1.1MB
    Downloads: 191
  • Dandelion Image Free Download PNG HQ PNG Image
    Dandelion Image Free Download PNG HQ
    Format: PNG
    Resolution: 500x512
    Size: 47.3KB
    Downloads: 191
  • Icicles PNG File HD PNG Image
    Icicles PNG File HD
    Format: PNG
    Resolution: 900x476
    Size: 180.6KB
    Downloads: 190
  • Icicles Image Free Download Image PNG Image
    Icicles Image Free Download Image
    Format: PNG
    Resolution: 6126x2538
    Size: 2.2MB
    Downloads: 190
  • Jasmine Garland Free Download PNG HQ PNG Image
    Jasmine Garland Free Download PNG HQ
    Format: PNG
    Resolution: 480x800
    Size: 252.9KB
    Downloads: 190
  • Jasmine Garland HD Image Free PNG PNG Image
    Jasmine Garland HD Image Free PNG
    Format: PNG
    Resolution: 600x800
    Size: 241.1KB
    Downloads: 190
  • Green Energy Picture HD Image Free PNG PNG Image
    Green Energy Picture HD Image Free PNG
    Format: PNG
    Resolution: 2400x2400
    Size: 58.3KB
    Downloads: 189
  • Falling Petals Photos PNG Image High Quality PNG Image
    Falling Petals Photos PNG Image High Quality
    Format: PNG
    Resolution: 852x480
    Size: 100.3KB
    Downloads: 188
  • Yellow Dandelion Photos Download HD PNG PNG Image
    Yellow Dandelion Photos Download HD PNG
    Format: PNG
    Resolution: 650x820
    Size: 128.8KB
    Downloads: 188
  • Falling Petals HD Download HD PNG PNG Image
    Falling Petals HD Download HD PNG
    Format: PNG
    Resolution: 1920x1080
    Size: 523.4KB
    Downloads: 187
  • Gardening Image Free HD Image PNG Image
    Gardening Image Free HD Image
    Format: PNG
    Resolution: 432x480
    Size: 267.7KB
    Downloads: 187

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