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.

  • Growing Plant HD PNG Free Photo PNG Image
    Growing Plant HD PNG Free Photo
    Format: PNG
    Resolution: 420x205
    Size: 25.4KB
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  • Growing Plant Photos PNG Download Free PNG Image
    Growing Plant Photos PNG Download Free
    Format: PNG
    Resolution: 650x979
    Size: 291.9KB
    Downloads: 238
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    Growing Plant Picture Free Transparent Image HD
    Format: PNG
    Resolution: 865x359
    Size: 195.4KB
    Downloads: 223
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    Growing Plant Picture Free Clipart HQ
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    Resolution: 1146x1675
    Size: 793.6KB
    Downloads: 239
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    Growing Plant HD Image Free PNG
    Format: PNG
    Resolution: 960x578
    Size: 233.3KB
    Downloads: 226
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    Growing Plant Free Clipart HQ
    Format: PNG
    Resolution: 1200x525
    Size: 229.5KB
    Downloads: 207
  • Half Moon Image Download HD PNG PNG Image
    Half Moon Image Download HD PNG
    Format: PNG
    Resolution: 650x500
    Size: 100.6KB
    Downloads: 272
  • Half Moon Image Download HD PNG PNG Image
    Half Moon Image Download HD PNG
    Format: PNG
    Resolution: 1500x1500
    Size: 836.2KB
    Downloads: 369
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    Half Moon Free PNG HQ
    Format: PNG
    Resolution: 700x700
    Size: 72.9KB
    Downloads: 222
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    Icicles PNG File HD
    Format: PNG
    Resolution: 900x476
    Size: 180.6KB
    Downloads: 190
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    Icicles Download PNG Image High Quality
    Format: PNG
    Resolution: 1200x848
    Size: 528.5KB
    Downloads: 196
  • Icicles Photos Download Free Image PNG Image
    Icicles Photos Download Free Image
    Format: PNG
    Resolution: 736x272
    Size: 225.4KB
    Downloads: 224
  • Icicles PNG Download Free PNG Image
    Icicles PNG Download Free
    Format: PNG
    Resolution: 4999x3115
    Size: 3.4MB
    Downloads: 213
  • Jasmine Garland Download Free Download Image PNG Image
    Jasmine Garland Download Free Download Image
    Format: PNG
    Resolution: 600x600
    Size: 185.4KB
    Downloads: 194
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    Jasmine Garland HD Download HD PNG
    Format: PNG
    Resolution: 600x600
    Size: 163.1KB
    Downloads: 195
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    Jasmine Garland Download HD PNG
    Format: PNG
    Resolution: 1121x1495
    Size: 675.8KB
    Downloads: 218
  • Jasmine Garland Image Free Clipart HQ PNG Image
    Jasmine Garland Image Free Clipart HQ
    Format: PNG
    Resolution: 500x500
    Size: 192.0KB
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  • Falling Leaf Image Free PNG HQ PNG Image
    Falling Leaf Image Free PNG HQ
    Format: PNG
    Resolution: 1024x1143
    Size: 468.2KB
    Downloads: 208
  • Falling Leaf HQ Image Free PNG PNG Image
    Falling Leaf HQ Image Free PNG
    Format: PNG
    Resolution: 545x472
    Size: 179.7KB
    Downloads: 193
  • Falling Petals Free Clipart HQ PNG Image
    Falling Petals Free Clipart HQ
    Format: PNG
    Resolution: 1920x1080
    Size: 543.3KB
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