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.

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  Growing Plant Image Free Download Image
  Format: PNG
  Resolution: 1614x820
  Size: 393.7KB
  Downloads: 204
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  Half Moon Picture Free Download Image
  Format: PNG
  Resolution: 512x512
  Size: 11.5KB
  Downloads: 204
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  Gardening Download Image Download HQ PNG
  Format: PNG
  Resolution: 512x512
  Size: 21.3KB
  Downloads: 204
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  Gardening HD Free Transparent Image HD
  Format: PNG
  Resolution: 512x512
  Size: 15.3KB
  Downloads: 204
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  Half Moon Photos Free Clipart HQ
  Format: PNG
  Resolution: 600x599
  Size: 65.2KB
  Downloads: 203
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  Jasmine Garland Free HD Image
  Format: PNG
  Resolution: 450x600
  Size: 168.4KB
  Downloads: 203
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  Icicles HD Image Free PNG
  Format: PNG
  Resolution: 1024x680
  Size: 1.2MB
  Downloads: 202
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  Soap Bubbles PNG Image High Quality
  Format: PNG
  Resolution: 919x720
  Size: 506.0KB
  Downloads: 202
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  Gardening Free HQ Image
  Format: PNG
  Resolution: 2400x1797
  Size: 178.7KB
  Downloads: 202
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  Green Energy Images Free Download Image
  Format: PNG
  Resolution: 558x557
  Size: 71.7KB
  Downloads: 202
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  Ground Image Free HD Image
  Format: PNG
  Resolution: 5000x2235
  Size: 927.8KB
  Downloads: 202
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  Ice Cube Picture Free Transparent Image HD
  Format: PNG
  Resolution: 952x1074
  Size: 146.8KB
  Downloads: 202
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  Colored Dandelion Free Download PNG HD
  Format: PNG
  Resolution: 650x391
  Size: 62.9KB
  Downloads: 202
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  Yellow Dandelion Image PNG Free Photo
  Format: PNG
  Resolution: 709x720
  Size: 597.3KB
  Downloads: 202
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  Growing Plant Free HQ Image
  Format: PNG
  Resolution: 603x993
  Size: 171.1KB
  Downloads: 201
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  Soap Bubbles Download Free Image
  Format: PNG
  Resolution: 435x800
  Size: 172.6KB
  Downloads: 201
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  Yellow Dandelion Download Free HQ Image
  Format: PNG
  Resolution: 894x894
  Size: 796.7KB
  Downloads: 201
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  Icicles Picture Download Free Image
  Format: PNG
  Resolution: 456x400
  Size: 158.9KB
  Downloads: 200
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  Gardening Free Transparent Image HD
  Format: PNG
  Resolution: 1794x1237
  Size: 356.2KB
  Downloads: 200
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  Green Energy Photos Download HQ PNG
  Format: PNG
  Resolution: 730x747
  Size: 49.1KB
  Downloads: 200

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