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.

  • 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
  • Falling Petals Download HD PNG PNG Image
    Falling Petals Download HD PNG
    Format: PNG
    Resolution: 852x480
    Size: 75.8KB
    Downloads: 238
  • Dandelion Picture Free Clipart HQ PNG Image
    Dandelion Picture Free Clipart HQ
    Format: PNG
    Resolution: 4275x1900
    Size: 461.9KB
    Downloads: 237
  • Soap Bubbles Download Image HD Image Free PNG PNG Image
    Soap Bubbles Download Image HD Image Free PNG
    Format: PNG
    Resolution: 534x712
    Size: 213.0KB
    Downloads: 237
  • Falling Petals Free Clipart HQ PNG Image
    Falling Petals Free Clipart HQ
    Format: PNG
    Resolution: 1920x1080
    Size: 543.3KB
    Downloads: 236
  • Dandelion Photos Download Free Image PNG Image
    Dandelion Photos Download Free Image
    Format: PNG
    Resolution: 450x333
    Size: 84.0KB
    Downloads: 234
  • Bin Associate Symbol Recycling Recycle Waste Electronic PNG Image
    Bin Associate Symbol Recycling Recycle Waste Electronic
    Format: PNG
    Resolution: 800x800
    Size: 60.2KB
    Downloads: 234
  • Colored Dandelion HD Image Free PNG PNG Image
    Colored Dandelion HD Image Free PNG
    Format: PNG
    Resolution: 1181x1181
    Size: 284.7KB
    Downloads: 234
  • Colored Dandelion Photos PNG Download Free PNG Image
    Colored Dandelion Photos PNG Download Free
    Format: PNG
    Resolution: 650x1011
    Size: 449.2KB
    Downloads: 234
  • Soap Bubbles Image Free Download Image PNG Image
    Soap Bubbles Image Free Download Image
    Format: PNG
    Resolution: 500x500
    Size: 99.2KB
    Downloads: 232
  • Colored Dandelion Image Download HD PNG PNG Image
    Colored Dandelion Image Download HD PNG
    Format: PNG
    Resolution: 792x612
    Size: 12.5KB
    Downloads: 230
  • Colored Dandelion Free HD Image PNG Image
    Colored Dandelion Free HD Image
    Format: PNG
    Resolution: 800x1000
    Size: 538.1KB
    Downloads: 230
  • Ground Free PNG HQ PNG Image
    Ground Free PNG HQ
    Format: PNG
    Resolution: 600x258
    Size: 146.1KB
    Downloads: 230
  • Green Leaf Free PNG HQ PNG Image
    Green Leaf Free PNG HQ
    Format: PNG
    Resolution: 2329x1957
    Size: 2.5MB
    Downloads: 229
  • Growing Plant Download Free Clipart HD PNG Image
    Growing Plant Download Free Clipart HD
    Format: PNG
    Resolution: 600x574
    Size: 128.5KB
    Downloads: 229
  • Growing Plant Free Download Image PNG Image
    Growing Plant Free Download Image
    Format: PNG
    Resolution: 512x512
    Size: 16.1KB
    Downloads: 228
  • Green Energy Free HQ Image PNG Image
    Green Energy Free HQ Image
    Format: PNG
    Resolution: 988x471
    Size: 39.7KB
    Downloads: 228
  • Japanese Flowering Cherry Download Free Clipart HD PNG Image
    Japanese Flowering Cherry Download Free Clipart HD
    Format: PNG
    Resolution: 660x660
    Size: 288.9KB
    Downloads: 228
  • Half Moon PNG Download Free PNG Image
    Half Moon PNG Download Free
    Format: PNG
    Resolution: 980x978
    Size: 39.6KB
    Downloads: 227

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