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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  Japanese Flowering Cherry Image Free Clipart HD
  Format: PNG
  Resolution: 682x700
  Size: 674.5KB
  Downloads: 242
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  Japanese Flowering Cherry PNG Download Free
  Format: PNG
  Resolution: 500x469
  Size: 214.5KB
  Downloads: 243
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  Japanese Flowering Cherry Free PNG HQ
  Format: PNG
  Resolution: 480x200
  Size: 100.9KB
  Downloads: 299
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  Japanese Flowering Cherry Picture Free HD Image
  Format: PNG
  Resolution: 528x677
  Size: 30.1KB
  Downloads: 207
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  Japanese Flowering Cherry Image HD Image Free PNG
  Format: PNG
  Resolution: 650x651
  Size: 337.7KB
  Downloads: 309
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  Japanese Flowering Cherry Picture PNG Download Free
  Format: PNG
  Resolution: 950x897
  Size: 233.4KB
  Downloads: 310
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  Japanese Flowering Cherry Download Free Image
  Format: PNG
  Resolution: 2714x2714
  Size: 2.4MB
  Downloads: 337
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  Japanese Flowering Cherry HQ Image Free PNG
  Format: PNG
  Resolution: 894x894
  Size: 793.7KB
  Downloads: 196
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  Japanese Flowering Cherry Images Download Free Image
  Format: PNG
  Resolution: 1600x800
  Size: 300.3KB
  Downloads: 269
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  Small Leaves Green Cartoon Download Free Image
  Format: PNG
  Resolution: 658x406
  Size: 42.9KB
  Downloads: 304
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  Twitter Computer Icons Free PNG HQ
  Format: PNG
  Resolution: 1024x1024
  Size: 40.8KB
  Downloads: 210
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  Bin Associate Symbol Recycling Recycle Waste Electronic
  Format: PNG
  Resolution: 800x800
  Size: 60.2KB
  Downloads: 234
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  Evergreen Poster Leaf Fortnite Shrub PNG Free Photo
  Format: PNG
  Resolution: 1024x1024
  Size: 436.2KB
  Downloads: 227
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  Grape Vine Leaf Art Download Free Image
  Format: PNG
  Resolution: 800x704
  Size: 59.7KB
  Downloads: 63
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  Grape Vine Leaf Art Free Download Image
  Format: PNG
  Resolution: 665x750
  Size: 89.6KB
  Downloads: 96
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  Grape Vine Leaf Art Free Clipart HD
  Format: PNG
  Resolution: 1920x1848
  Size: 353.3KB
  Downloads: 87
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  Grape Vine Leaf Art Photos
  Format: PNG
  Resolution: 641x465
  Size: 154.6KB
  Downloads: 79
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  Pic Grape Vine Leaf Art
  Format: PNG
  Resolution: 1000x960
  Size: 117.8KB
  Downloads: 78
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  Grape Vine Leaf Art PNG Download Free
  Format: PNG
  Resolution: 512x160
  Size: 67.1KB
  Downloads: 93
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  Grape Vine Leaf Art PNG File HD
  Format: PNG
  Resolution: 708x750
  Size: 198.2KB
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