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.

  • Falling Leaf Download Free Image PNG Image
    Falling Leaf Download Free Image
    Format: PNG
    Resolution: 590x300
    Size: 283.9KB
    Downloads: 207
  • Falling Leaf Free Photo PNG PNG Image
    Falling Leaf Free Photo PNG
    Format: PNG
    Resolution: 1920x1080
    Size: 686.5KB
    Downloads: 224
  • Colored Dandelion Free HD Image PNG Image
    Colored Dandelion Free HD Image
    Format: PNG
    Resolution: 794x1005
    Size: 326.3KB
    Downloads: 207
  • Falling Petals Free Download PNG HD PNG Image
    Falling Petals Free Download PNG HD
    Format: PNG
    Resolution: 730x1095
    Size: 190.1KB
    Downloads: 210
  • Falling Petals Free HQ Image PNG Image
    Falling Petals Free HQ Image
    Format: PNG
    Resolution: 894x894
    Size: 842.2KB
    Downloads: 212
  • 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
  • Colored Dandelion Image HQ Image Free PNG PNG Image
    Colored Dandelion Image HQ Image Free PNG
    Format: PNG
    Resolution: 600x600
    Size: 112.7KB
    Downloads: 184
  • Dandelion Free Photo PNG PNG Image
    Dandelion Free Photo PNG
    Format: PNG
    Resolution: 1200x900
    Size: 495.3KB
    Downloads: 199
  • 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
  • Dandelion Download Download Free Image PNG Image
    Dandelion Download Download Free Image
    Format: PNG
    Resolution: 960x720
    Size: 634.7KB
    Downloads: 195
  • Soap Bubbles Photos PNG Free Photo PNG Image
    Soap Bubbles Photos PNG Free Photo
    Format: PNG
    Resolution: 500x468
    Size: 54.2KB
    Downloads: 319
  • Dandelion Picture Free HD Image PNG Image
    Dandelion Picture Free HD Image
    Format: PNG
    Resolution: 1280x1047
    Size: 225.4KB
    Downloads: 211
  • Soap Bubbles Picture Free HQ Image PNG Image
    Soap Bubbles Picture Free HQ Image
    Format: PNG
    Resolution: 640x627
    Size: 174.3KB
    Downloads: 209
  • Soap Bubbles Download Free Image PNG Image
    Soap Bubbles Download Free Image
    Format: PNG
    Resolution: 435x800
    Size: 172.6KB
    Downloads: 201
  • Soap Bubbles Images Free Transparent Image HD PNG Image
    Soap Bubbles Images Free Transparent Image HD
    Format: PNG
    Resolution: 600x600
    Size: 292.5KB
    Downloads: 207
  • Soap Bubbles PNG Image High Quality PNG Image
    Soap Bubbles PNG Image High Quality
    Format: PNG
    Resolution: 919x720
    Size: 506.0KB
    Downloads: 202
  • Gardening Download Image Download HQ PNG PNG Image
    Gardening Download Image Download HQ PNG
    Format: PNG
    Resolution: 512x512
    Size: 21.3KB
    Downloads: 204
  • Gardening Download Free Transparent Image HQ PNG Image
    Gardening Download Free Transparent Image HQ
    Format: PNG
    Resolution: 1694x1424
    Size: 443.0KB
    Downloads: 219
  • Gardening HD Free Transparent Image HD PNG Image
    Gardening HD Free Transparent Image HD
    Format: PNG
    Resolution: 2000x2000
    Size: 169.1KB
    Downloads: 220
  • Dandelion Free HQ Image PNG Image
    Dandelion Free HQ Image
    Format: PNG
    Resolution: 800x600
    Size: 388.7KB
    Downloads: 217

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