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.

  • Soap Bubbles Image Free HD Image PNG Image
    Soap Bubbles Image Free HD Image
    Format: PNG
    Resolution: 4248x3840
    Size: 3.3MB
    Downloads: 339
  • Half Moon Free Clipart HD PNG Image
    Half Moon Free Clipart HD
    Format: PNG
    Resolution: 512x512
    Size: 19.1KB
    Downloads: 261
  • Soap Bubbles HD Download HD PNG PNG Image
    Soap Bubbles HD Download HD PNG
    Format: PNG
    Resolution: 500x500
    Size: 78.5KB
    Downloads: 191
  • Soap Bubbles Picture Free PNG HQ PNG Image
    Soap Bubbles Picture Free PNG HQ
    Format: PNG
    Resolution: 827x1024
    Size: 199.2KB
    Downloads: 206
  • 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 Free Transparent Image HD PNG Image
    Soap Bubbles Free Transparent Image HD
    Format: PNG
    Resolution: 484x350
    Size: 134.5KB
    Downloads: 492
  • Jasmine Garland Free HD Image PNG Image
    Jasmine Garland Free HD Image
    Format: PNG
    Resolution: 450x600
    Size: 168.4KB
    Downloads: 203
  • Leaf Transparent Image PNG Image
    Leaf Transparent Image
    Format: PNG
    Resolution: 1000x983
    Size: 1.4MB
    Downloads: 656
  • 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
  • Icicles Picture Download Free Image PNG Image
    Icicles Picture Download Free Image
    Format: PNG
    Resolution: 456x400
    Size: 158.9KB
    Downloads: 200
  • Icicles Free Transparent Image HQ PNG Image
    Icicles Free Transparent Image HQ
    Format: PNG
    Resolution: 2193x1200
    Size: 3.3MB
    Downloads: 226
  • Leaf Free Download PNG Image
    Leaf Free Download
    Format: PNG
    Resolution: 1376x1600
    Size: 2.3MB
    Downloads: 613
  • Gardening Photos PNG File HD PNG Image
    Gardening Photos PNG File HD
    Format: PNG
    Resolution: 729x512
    Size: 152.9KB
    Downloads: 227
  • Green Energy Free HQ Image PNG Image
    Green Energy Free HQ Image
    Format: PNG
    Resolution: 988x471
    Size: 39.7KB
    Downloads: 228
  • Jasmine Garland Image Free Clipart HQ PNG Image
    Jasmine Garland Image Free Clipart HQ
    Format: PNG
    Resolution: 455x717
    Size: 126.5KB
    Downloads: 276
  • Falling Leaf PNG Image High Quality PNG Image
    Falling Leaf PNG Image High Quality
    Format: PNG
    Resolution: 650x728
    Size: 93.8KB
    Downloads: 215
  • Jasmine Garland Picture Download HQ PNG PNG Image
    Jasmine Garland Picture Download HQ PNG
    Format: PNG
    Resolution: 600x600
    Size: 183.3KB
    Downloads: 209
  • 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
  • Icicles Free Download PNG HQ PNG Image
    Icicles Free Download PNG HQ
    Format: PNG
    Resolution: 6999x2258
    Size: 4.0MB
    Downloads: 220

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