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.

• 

  Pic Green Leafs HD Image Free
  Format: PNG
  Resolution: 1024x746
  Size: 381.0KB
  Downloads: 94
• 

  Grape Vine Leaf Art PNG Download Free
  Format: PNG
  Resolution: 512x160
  Size: 67.1KB
  Downloads: 93
• 

  Vine Leaf Grape Bunch Free Clipart HQ
  Format: PNG
  Resolution: 1559x771
  Size: 472.3KB
  Downloads: 93
• 

  Green Organic Leafs Download HD
  Format: PNG
  Resolution: 2531x2800
  Size: 5.9MB
  Downloads: 93
• 

  Green Leafs PNG Free Photo
  Format: PNG
  Resolution: 2572x1662
  Size: 2.7MB
  Downloads: 92
• 

  Fresh Green Leafs PNG Free Photo
  Format: PNG
  Resolution: 1087x988
  Size: 148.9KB
  Downloads: 91
• 

  Fresh Green Leafs PNG Free Photo
  Format: PNG
  Resolution: 512x384
  Size: 187.0KB
  Downloads: 90
• 

  Green Organic Leafs Download Free Image
  Format: PNG
  Resolution: 1700x1246
  Size: 2.0MB
  Downloads: 90
• 

  Grape Vine Leaf Art Free Clipart HD
  Format: PNG
  Resolution: 1920x1848
  Size: 353.3KB
  Downloads: 87
• 

  Green Organic Leafs Free Photo
  Format: PNG
  Resolution: 820x659
  Size: 498.8KB
  Downloads: 87
• 

  Vine Leaf Grape Bunch Free Clipart HQ
  Format: PNG
  Resolution: 500x488
  Size: 298.1KB
  Downloads: 86
• 

  Vine Leaf Grape Bunch Free Download PNG HD
  Format: PNG
  Resolution: 991x807
  Size: 1.1MB
  Downloads: 86
• 

  Vine Leaf Grape Free Transparent Image HD
  Format: PNG
  Resolution: 1600x1200
  Size: 906.8KB
  Downloads: 85
• 

  Green Leafs Free HQ Image
  Format: PNG
  Resolution: 600x568
  Size: 214.3KB
  Downloads: 85
• 

  Fresh Green Leafs Free Transparent Image HQ
  Format: PNG
  Resolution: 1369x1049
  Size: 1.4MB
  Downloads: 80
• 

  Fresh Green Leafs HQ Image Free
  Format: PNG
  Resolution: 1096x387
  Size: 83.8KB
  Downloads: 80
• 

  Vine Leaf Grape Free HD Image
  Format: PNG
  Resolution: 1257x875
  Size: 995.8KB
  Downloads: 80
• 

  Grape Vine Leaf Art Photos
  Format: PNG
  Resolution: 641x465
  Size: 154.6KB
  Downloads: 79
• 

  Green Leafs PNG Free Photo
  Format: PNG
  Resolution: 3376x3516
  Size: 3.5MB
  Downloads: 79
• 

  Vector Green Leafs HQ Image Free
  Format: PNG
  Resolution: 512x512
  Size: 124.1KB
  Downloads: 79

RELATED CATEGORIES

Leaf

Wood

Leaf

Lilac

Flower

Watermelon

Plant

Leaf

Wood

Plant