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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  Dandelion Picture Free HD Image
  Format: PNG
  Resolution: 1280x1047
  Size: 225.4KB
  Downloads: 211
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  Dandelion Image Free Download PNG HQ
  Format: PNG
  Resolution: 500x512
  Size: 47.3KB
  Downloads: 191
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  Dandelion Picture Free Clipart HQ
  Format: PNG
  Resolution: 4275x1900
  Size: 461.9KB
  Downloads: 237
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  Dandelion HQ Image Free PNG
  Format: PNG
  Resolution: 2244x6605
  Size: 845.1KB
  Downloads: 227
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  Dandelion Free HD Image
  Format: PNG
  Resolution: 600x600
  Size: 48.5KB
  Downloads: 194
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  Dandelion Free HQ Image
  Format: PNG
  Resolution: 800x600
  Size: 388.7KB
  Downloads: 217
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  Yellow Dandelion Free Clipart HD
  Format: PNG
  Resolution: 2400x2400
  Size: 567.1KB
  Downloads: 197
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  Yellow Dandelion Free HQ Image
  Format: PNG
  Resolution: 509x600
  Size: 306.4KB
  Downloads: 185
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  Yellow Dandelion Download Free HQ Image
  Format: PNG
  Resolution: 894x894
  Size: 796.7KB
  Downloads: 201
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  Yellow Dandelion HD PNG Image High Quality
  Format: PNG
  Resolution: 800x800
  Size: 319.8KB
  Downloads: 183
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  Yellow Dandelion Image Download HD PNG
  Format: PNG
  Resolution: 500x481
  Size: 185.3KB
  Downloads: 218
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  Yellow Dandelion Photos Download HD PNG
  Format: PNG
  Resolution: 650x820
  Size: 128.8KB
  Downloads: 188
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  Yellow Dandelion Download Free Image
  Format: PNG
  Resolution: 512x512
  Size: 219.0KB
  Downloads: 194
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  Yellow Dandelion Image PNG Free Photo
  Format: PNG
  Resolution: 709x720
  Size: 597.3KB
  Downloads: 202
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  Yellow Dandelion Free PNG HQ
  Format: PNG
  Resolution: 624x629
  Size: 167.7KB
  Downloads: 200
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  Yellow Dandelion Free Clipart HQ
  Format: PNG
  Resolution: 936x853
  Size: 781.8KB
  Downloads: 200
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  Japanese Flowering Cherry Download Free Image
  Format: PNG
  Resolution: 675x514
  Size: 367.9KB
  Downloads: 484
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  Japanese Flowering Cherry HD Image Free PNG
  Format: PNG
  Resolution: 900x692
  Size: 887.9KB
  Downloads: 316
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  Japanese Flowering Cherry Download Free Clipart HD
  Format: PNG
  Resolution: 660x660
  Size: 288.9KB
  Downloads: 228
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  Japanese Flowering Cherry HD Free Photo PNG
  Format: PNG
  Resolution: 932x720
  Size: 218.0KB
  Downloads: 194

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