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.

  • Green Leaf Free PNG HQ PNG Image
    Green Leaf Free PNG HQ
    Format: PNG
    Resolution: 800x600
    Size: 605.4KB
    Downloads: 531
  • Green Leaf Picture Free PNG HQ PNG Image
    Green Leaf Picture Free PNG HQ
    Format: PNG
    Resolution: 800x600
    Size: 18.5KB
    Downloads: 360
  • Green Leaf Image Free Photo PNG PNG Image
    Green Leaf Image Free Photo PNG
    Format: PNG
    Resolution: 636x720
    Size: 461.2KB
    Downloads: 405
  • Green Leaf Picture PNG Download Free PNG Image
    Green Leaf Picture PNG Download Free
    Format: PNG
    Resolution: 1280x439
    Size: 465.9KB
    Downloads: 280
  • Green Leaf Free Transparent Image HD PNG Image
    Green Leaf Free Transparent Image HD
    Format: PNG
    Resolution: 3500x2300
    Size: 3.5MB
    Downloads: 518
  • Green Leaf Free PNG HQ PNG Image
    Green Leaf Free PNG HQ
    Format: PNG
    Resolution: 456x285
    Size: 76.9KB
    Downloads: 274
  • Green Leaf Images Free Clipart HD PNG Image
    Green Leaf Images Free Clipart HD
    Format: PNG
    Resolution: 749x807
    Size: 383.7KB
    Downloads: 270
  • Green Leaf Free PNG HQ PNG Image
    Green Leaf Free PNG HQ
    Format: PNG
    Resolution: 2329x1957
    Size: 2.5MB
    Downloads: 229
  • Growing Plant Free Download Image PNG Image
    Growing Plant Free Download Image
    Format: PNG
    Resolution: 512x512
    Size: 16.1KB
    Downloads: 228
  • Growing Plant Free Download Image PNG Image
    Growing Plant Free Download Image
    Format: PNG
    Resolution: 512x512
    Size: 9.2KB
    Downloads: 194
  • Growing Plant Download Free Clipart HD PNG Image
    Growing Plant Download Free Clipart HD
    Format: PNG
    Resolution: 600x574
    Size: 128.5KB
    Downloads: 229
  • Growing Plant HD PNG Free Photo PNG Image
    Growing Plant HD PNG Free Photo
    Format: PNG
    Resolution: 420x205
    Size: 25.4KB
    Downloads: 215
  • Growing Plant Image Free Transparent Image HD PNG Image
    Growing Plant Image Free Transparent Image HD
    Format: PNG
    Resolution: 833x576
    Size: 146.1KB
    Downloads: 290
  • Growing Plant Free HQ Image PNG Image
    Growing Plant Free HQ Image
    Format: PNG
    Resolution: 603x993
    Size: 171.1KB
    Downloads: 201
  • Growing Plant Photos PNG Download Free PNG Image
    Growing Plant Photos PNG Download Free
    Format: PNG
    Resolution: 650x979
    Size: 291.9KB
    Downloads: 238
  • Growing Plant Free HD Image PNG Image
    Growing Plant Free HD Image
    Format: PNG
    Resolution: 512x512
    Size: 7.2KB
    Downloads: 213
  • Growing Plant Picture Free Transparent Image HD PNG Image
    Growing Plant Picture Free Transparent Image HD
    Format: PNG
    Resolution: 865x359
    Size: 195.4KB
    Downloads: 223
  • Growing Plant Image Free Download Image PNG Image
    Growing Plant Image Free Download Image
    Format: PNG
    Resolution: 1614x820
    Size: 393.7KB
    Downloads: 204
  • Growing Plant Picture Free Clipart HQ PNG Image
    Growing Plant Picture Free Clipart HQ
    Format: PNG
    Resolution: 1146x1675
    Size: 793.6KB
    Downloads: 239
  • Growing Plant HD Image Free PNG PNG Image
    Growing Plant HD Image Free PNG
    Format: PNG
    Resolution: 960x578
    Size: 233.3KB
    Downloads: 226

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