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 Image Free Transparent Image HD PNG Image
    Growing Plant Image Free Transparent Image HD
    Format: PNG
    Resolution: 833x576
    Size: 146.1KB
    Downloads: 290
  • Falling Leaf Photos Download HD PNG PNG Image
    Falling Leaf Photos Download HD PNG
    Format: PNG
    Resolution: 852x480
    Size: 138.5KB
    Downloads: 286
  • Soap Bubbles HD Image Free PNG PNG Image
    Soap Bubbles HD Image Free PNG
    Format: PNG
    Resolution: 1400x1611
    Size: 644.2KB
    Downloads: 285
  • Falling Petals Download HQ Image Free PNG PNG Image
    Falling Petals Download HQ Image Free PNG
    Format: PNG
    Resolution: 1920x1080
    Size: 1.0MB
    Downloads: 282
  • Green Leaf Picture PNG Download Free PNG Image
    Green Leaf Picture PNG Download Free
    Format: PNG
    Resolution: 1280x439
    Size: 465.9KB
    Downloads: 280
  • Ice Cube Free Download PNG HD PNG Image
    Ice Cube Free Download PNG HD
    Format: PNG
    Resolution: 1920x1080
    Size: 1.1MB
    Downloads: 280
  • Falling Petals Free Download PNG HQ PNG Image
    Falling Petals Free Download PNG HQ
    Format: PNG
    Resolution: 894x894
    Size: 986.3KB
    Downloads: 280
  • Ground Free Download PNG HQ PNG Image
    Ground Free Download PNG HQ
    Format: PNG
    Resolution: 1098x727
    Size: 1.0MB
    Downloads: 278
  • Jasmine Garland Image Free Clipart HQ PNG Image
    Jasmine Garland Image Free Clipart HQ
    Format: PNG
    Resolution: 455x717
    Size: 126.5KB
    Downloads: 276
  • Colored Dandelion Download HQ PNG PNG Image
    Colored Dandelion Download HQ PNG
    Format: PNG
    Resolution: 600x601
    Size: 381.1KB
    Downloads: 275
  • Green Leaf Free PNG HQ PNG Image
    Green Leaf Free PNG HQ
    Format: PNG
    Resolution: 456x285
    Size: 76.9KB
    Downloads: 274
  • Ground Free Transparent Image HQ PNG Image
    Ground Free Transparent Image HQ
    Format: PNG
    Resolution: 600x600
    Size: 248.3KB
    Downloads: 272
  • Half Moon Image Download HD PNG PNG Image
    Half Moon Image Download HD PNG
    Format: PNG
    Resolution: 650x500
    Size: 100.6KB
    Downloads: 272
  • Green Leaf Images Free Clipart HD PNG Image
    Green Leaf Images Free Clipart HD
    Format: PNG
    Resolution: 749x807
    Size: 383.7KB
    Downloads: 270
  • Japanese Flowering Cherry Images Download Free Image PNG Image
    Japanese Flowering Cherry Images Download Free Image
    Format: PNG
    Resolution: 1600x800
    Size: 300.3KB
    Downloads: 269
  • Falling Leaf PNG Download Free PNG Image
    Falling Leaf PNG Download Free
    Format: PNG
    Resolution: 1600x1600
    Size: 458.8KB
    Downloads: 268
  • Gardening Image Free Clipart HD PNG Image
    Gardening Image Free Clipart HD
    Format: PNG
    Resolution: 412x280
    Size: 124.6KB
    Downloads: 267
  • Soap Bubbles Free Transparent Image HD PNG Image
    Soap Bubbles Free Transparent Image HD
    Format: PNG
    Resolution: 725x768
    Size: 84.9KB
    Downloads: 267
  • Half Moon Download HD PNG PNG Image
    Half Moon Download HD PNG
    Format: PNG
    Resolution: 3431x3845
    Size: 308.9KB
    Downloads: 262
  • Half Moon Free Transparent Image HQ PNG Image
    Half Moon Free Transparent Image HQ
    Format: PNG
    Resolution: 668x720
    Size: 137.3KB
    Downloads: 261

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