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.

  • Gardening Images Free Download PNG HQ PNG Image
    Gardening Images Free Download PNG HQ
    Format: PNG
    Resolution: 514x1024
    Size: 418.5KB
    Downloads: 186
  • Green Energy Free HD Image PNG Image
    Green Energy Free HD Image
    Format: PNG
    Resolution: 875x611
    Size: 42.3KB
    Downloads: 186
  • Yellow Dandelion Free HQ Image PNG Image
    Yellow Dandelion Free HQ Image
    Format: PNG
    Resolution: 509x600
    Size: 306.4KB
    Downloads: 185
  • Ice Cube Free Download PNG HD PNG Image
    Ice Cube Free Download PNG HD
    Format: PNG
    Resolution: 623x431
    Size: 402.0KB
    Downloads: 184
  • 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
  • Icicles Free HQ Image PNG Image
    Icicles Free HQ Image
    Format: PNG
    Resolution: 2068x5138
    Size: 1.9MB
    Downloads: 183
  • Gardening HQ Image Free PNG PNG Image
    Gardening HQ Image Free PNG
    Format: PNG
    Resolution: 516x523
    Size: 97.9KB
    Downloads: 183
  • Yellow Dandelion HD PNG Image High Quality PNG Image
    Yellow Dandelion HD PNG Image High Quality
    Format: PNG
    Resolution: 800x800
    Size: 319.8KB
    Downloads: 183
  • Ice Cube Picture Free Download Image PNG Image
    Ice Cube Picture Free Download Image
    Format: PNG
    Resolution: 600x600
    Size: 122.6KB
    Downloads: 181
  • Green Energy Picture Free Transparent Image HQ PNG Image
    Green Energy Picture Free Transparent Image HQ
    Format: PNG
    Resolution: 400x400
    Size: 11.4KB
    Downloads: 179
  • Green Energy Free HD Image PNG Image
    Green Energy Free HD Image
    Format: PNG
    Resolution: 512x512
    Size: 22.9KB
    Downloads: 176
  • Ice Cube Free HQ Image PNG Image
    Ice Cube Free HQ Image
    Format: PNG
    Resolution: 1000x800
    Size: 268.1KB
    Downloads: 176
  • Ice Cube Download Free Download PNG HQ PNG Image
    Ice Cube Download Free Download PNG HQ
    Format: PNG
    Resolution: 600x600
    Size: 134.0KB
    Downloads: 169
  • Green Leafs Free HD Image PNG Image
    Green Leafs Free HD Image
    Format: PNG
    Resolution: 1885x2257
    Size: 82.5KB
    Downloads: 100
  • Vine Leaf Grape Free Transparent Image HD PNG Image
    Vine Leaf Grape Free Transparent Image HD
    Format: PNG
    Resolution: 590x346
    Size: 90.7KB
    Downloads: 98
  • Green Organic Leafs Photos Free Download PNG HQ PNG Image
    Green Organic Leafs Photos Free Download PNG HQ
    Format: PNG
    Resolution: 2201x2812
    Size: 5.3MB
    Downloads: 98
  • Fresh Green Leafs Photos PNG Free Photo PNG Image
    Fresh Green Leafs Photos PNG Free Photo
    Format: PNG
    Resolution: 2177x1988
    Size: 99.6KB
    Downloads: 97
  • Vine Leaf Grape Free Clipart HD PNG Image
    Vine Leaf Grape Free Clipart HD
    Format: PNG
    Resolution: 1321x1787
    Size: 575.0KB
    Downloads: 97
  • Grape Vine Leaf Art Free Download Image PNG Image
    Grape Vine Leaf Art Free Download Image
    Format: PNG
    Resolution: 665x750
    Size: 89.6KB
    Downloads: 96
  • Vine Leaf Grape Bunch PNG Free Photo PNG Image
    Vine Leaf Grape Bunch PNG Free Photo
    Format: PNG
    Resolution: 960x449
    Size: 314.1KB
    Downloads: 94

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