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.

  • Half Moon Image Download HD PNG PNG Image
    Half Moon Image Download HD PNG
    Format: PNG
    Resolution: 1500x1500
    Size: 836.2KB
    Downloads: 369
  • Green Leaf Picture Free PNG HQ PNG Image
    Green Leaf Picture Free PNG HQ
    Format: PNG
    Resolution: 800x600
    Size: 18.5KB
    Downloads: 360
  • Soap Bubbles Image Free HD Image PNG Image
    Soap Bubbles Image Free HD Image
    Format: PNG
    Resolution: 4248x3840
    Size: 3.3MB
    Downloads: 339
  • Falling Petals Image Free HQ Image PNG Image
    Falling Petals Image Free HQ Image
    Format: PNG
    Resolution: 650x492
    Size: 125.7KB
    Downloads: 338
  • Japanese Flowering Cherry Download Free Image PNG Image
    Japanese Flowering Cherry Download Free Image
    Format: PNG
    Resolution: 2714x2714
    Size: 2.4MB
    Downloads: 337
  • Jasmine Garland Image Free Clipart HQ PNG Image
    Jasmine Garland Image Free Clipart HQ
    Format: PNG
    Resolution: 500x500
    Size: 192.0KB
    Downloads: 324
  • Soap Bubbles Photos PNG Free Photo PNG Image
    Soap Bubbles Photos PNG Free Photo
    Format: PNG
    Resolution: 500x468
    Size: 54.2KB
    Downloads: 319
  • Soap Bubbles Free Download Image PNG Image
    Soap Bubbles Free Download Image
    Format: PNG
    Resolution: 1921x1893
    Size: 1.1MB
    Downloads: 318
  • Japanese Flowering Cherry HD Image Free PNG PNG Image
    Japanese Flowering Cherry HD Image Free PNG
    Format: PNG
    Resolution: 900x692
    Size: 887.9KB
    Downloads: 316
  • Green Leaf Free Clipart HQ PNG Image
    Green Leaf Free Clipart HQ
    Format: PNG
    Resolution: 800x1200
    Size: 1.1MB
    Downloads: 311
  • Japanese Flowering Cherry Picture PNG Download Free PNG Image
    Japanese Flowering Cherry Picture PNG Download Free
    Format: PNG
    Resolution: 950x897
    Size: 233.4KB
    Downloads: 310
  • Japanese Flowering Cherry Image HD Image Free PNG PNG Image
    Japanese Flowering Cherry Image HD Image Free PNG
    Format: PNG
    Resolution: 650x651
    Size: 337.7KB
    Downloads: 309
  • Gardening Free Download PNG HD PNG Image
    Gardening Free Download PNG HD
    Format: PNG
    Resolution: 1024x773
    Size: 1.2MB
    Downloads: 309
  • Ice Cube PNG Free Photo PNG Image
    Ice Cube PNG Free Photo
    Format: PNG
    Resolution: 550x367
    Size: 192.3KB
    Downloads: 305
  • Small Leaves Green Cartoon Download Free Image PNG Image
    Small Leaves Green Cartoon Download Free Image
    Format: PNG
    Resolution: 658x406
    Size: 42.9KB
    Downloads: 304
  • Half Moon Free Download Image PNG Image
    Half Moon Free Download Image
    Format: PNG
    Resolution: 1300x1300
    Size: 486.4KB
    Downloads: 302
  • Japanese Flowering Cherry Free PNG HQ PNG Image
    Japanese Flowering Cherry Free PNG HQ
    Format: PNG
    Resolution: 480x200
    Size: 100.9KB
    Downloads: 299
  • Green Leaf Photos HD Image Free PNG PNG Image
    Green Leaf Photos HD Image Free PNG
    Format: PNG
    Resolution: 852x480
    Size: 240.3KB
    Downloads: 298
  • Green Leaf Free Transparent Image HQ PNG Image
    Green Leaf Free Transparent Image HQ
    Format: PNG
    Resolution: 600x600
    Size: 21.4KB
    Downloads: 298
  • Dandelion Free Download PNG HQ PNG Image
    Dandelion Free Download PNG HQ
    Format: PNG
    Resolution: 600x600
    Size: 71.8KB
    Downloads: 292

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