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.

  • Half Moon Free Clipart HD PNG Image
    Half Moon Free Clipart HD
    Format: PNG
    Resolution: 512x512
    Size: 19.1KB
    Downloads: 261
  • Dandelion HD PNG Free Photo PNG Image
    Dandelion HD PNG Free Photo
    Format: PNG
    Resolution: 800x800
    Size: 74.7KB
    Downloads: 253
  • Soap Bubbles PNG Image High Quality PNG Image
    Soap Bubbles PNG Image High Quality
    Format: PNG
    Resolution: 600x600
    Size: 205.4KB
    Downloads: 253
  • Falling Petals Image Free Download PNG HQ PNG Image
    Falling Petals Image Free Download PNG HQ
    Format: PNG
    Resolution: 1024x576
    Size: 299.3KB
    Downloads: 250
  • Green Leaf HD Download HQ PNG PNG Image
    Green Leaf HD Download HQ PNG
    Format: PNG
    Resolution: 960x403
    Size: 387.5KB
    Downloads: 250
  • Ground Free HQ Image PNG Image
    Ground Free HQ Image
    Format: PNG
    Resolution: 979x816
    Size: 666.4KB
    Downloads: 249
  • Green Leaf Image Free PNG HQ PNG Image
    Green Leaf Image Free PNG HQ
    Format: PNG
    Resolution: 948x624
    Size: 351.4KB
    Downloads: 248
  • Dandelion Free Download Image PNG Image
    Dandelion Free Download Image
    Format: PNG
    Resolution: 1955x2000
    Size: 444.4KB
    Downloads: 247
  • Dandelion Free Clipart HQ PNG Image
    Dandelion Free Clipart HQ
    Format: PNG
    Resolution: 500x500
    Size: 118.4KB
    Downloads: 245
  • Green Leaf Download Free Clipart HQ PNG Image
    Green Leaf Download Free Clipart HQ
    Format: PNG
    Resolution: 640x336
    Size: 257.8KB
    Downloads: 244
  • Falling Leaf Image Free Clipart HD PNG Image
    Falling Leaf Image Free Clipart HD
    Format: PNG
    Resolution: 1920x1080
    Size: 1.4MB
    Downloads: 244
  • Soap Bubbles Download Free Download PNG HD PNG Image
    Soap Bubbles Download Free Download PNG HD
    Format: PNG
    Resolution: 1257x641
    Size: 282.8KB
    Downloads: 243
  • Japanese Flowering Cherry PNG Download Free PNG Image
    Japanese Flowering Cherry PNG Download Free
    Format: PNG
    Resolution: 500x469
    Size: 214.5KB
    Downloads: 243
  • Japanese Flowering Cherry Image Free Clipart HD PNG Image
    Japanese Flowering Cherry Image Free Clipart HD
    Format: PNG
    Resolution: 682x700
    Size: 674.5KB
    Downloads: 242
  • Soap Bubbles PNG Free Photo PNG Image
    Soap Bubbles PNG Free Photo
    Format: PNG
    Resolution: 600x332
    Size: 42.8KB
    Downloads: 241
  • Ice Cube Download Free Image PNG Image
    Ice Cube Download Free Image
    Format: PNG
    Resolution: 1073x360
    Size: 618.3KB
    Downloads: 241
  • 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
  • Growing Plant Picture Free Clipart HQ PNG Image
    Growing Plant Picture Free Clipart HQ
    Format: PNG
    Resolution: 1146x1675
    Size: 793.6KB
    Downloads: 239
  • Ground Picture HD Image Free PNG PNG Image
    Ground Picture HD Image Free PNG
    Format: PNG
    Resolution: 1600x1060
    Size: 1.4MB
    Downloads: 238
  • Icicles Image Free Download PNG HQ PNG Image
    Icicles Image Free Download PNG HQ
    Format: PNG
    Resolution: 4055x6000
    Size: 2.8MB
    Downloads: 238

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