A leaf is the associate organ of a tracheophyte and is that the principal lateral appendage of the stem. The leaves and stem along with type the shoot. Leaves are together said as foliage, as in 'autumn foliage'. A leaf is the associate organ of a tracheophyte and is that the principal lateral appendage of the stem. The leaves and stem along with type the shoot. Leaves are together said as foliage, as in 'autumn foliage'.
A leaf could be a skinny, dorsiventrally planar organ, sometimes borne on top of the ground and specialised for chemical change. In most leaves, the first chemical process tissue, the palisade mesophyll, is found on the side of the blade or plate of the leaf. However in some species, together with the mature foliage of Eucalyptus, palisade mesophyll is gift on each side and also the leaves are aforementioned to be bilaterally symmetric. Most leaves have a distinct side (ad axial) and lower surface (axial) that take issue in colour, hairiness, the number of stomata (pores that intake and output gases), the quantity and structure of epicuticular wax and different options.
Leaves will have many various shapes, sizes and textures. The broad, flat leaves with complicated venation of flowering plants are called megaphylls and also the species that bear them, the bulk, as broad-leafed or megaphyllous plants. Within the clubmosses, with totally different biological process origins, the leaves are straightforward (with solely one vein) and are called microphylls. Some leaves, like bulb scales, don't seem to be on top of the ground. In several aquatic species, the leaves are submerged in water. Succulent plants typically have thick juicy leaves, however, some leaves ar while not major chemical process operates and will be dead at maturity, as in some cataphylls and spines. What is more, many sorts of leaf-like structures found in tube-shaped structure plants don't seem to be completely homologous with them. Examples embody planar plant stems known as phylloclades and cladodes, and planar leaf stems known as phyllodes that take issue from leaves each in their structure and origin. Some structures of non-vascular plants look and performance very like leaves. Examples embody the phyllids of mosses and liverworts. Midvein (Primary vein) Secondary Leaf.

In this sub category you can download free PNG images: Leaves Nature. In this category "Leaves" we have 123 free PNG images with transparent background.

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  Fresh Leaves Green Free HQ Image
  Format: PNG
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  Size: 3.7MB
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  Images Ivy Hanging Download HQ
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  Ivy Hanging PNG File HD
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  Picture Ivy Hanging PNG Free Photo
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  Pic Ivy Hanging PNG Image High Quality
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  Resolution: 600x600
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  Ivy Hanging Free Transparent Image HQ
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  Ivy Hanging Download Free Image
  Format: PNG
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  Leaves Green Ivy Hanging Download HD
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  Leaves Green Ivy Hanging Free Download PNG HD
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  Leaves Green Ivy Hanging HD Image Free
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  Water Leaf Tree Free PNG HQ
  Format: PNG
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  Water Leaf Tree PNG Image High Quality
  Format: PNG
  Resolution: 500x507
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  Water Drop Leaf PNG File HD
  Format: PNG
  Resolution: 600x420
  Size: 137.0KB
  Downloads: 71
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  Water Drop Leaf Free Photo
  Format: PNG
  Resolution: 1600x1200
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  Water Drop Leaf Dew PNG File HD
  Format: PNG
  Resolution: 900x820
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  Autumn Leaves Image
  Format: PNG
  Resolution: 2690x1990
  Size: 3.6MB
  Downloads: 316
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  Water Drop Leaf Dew Download HD
  Format: PNG
  Resolution: 1181x1181
  Size: 387.7KB
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  Water Drop Leaf Dew Free Transparent Image HQ
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  Water Drop Leaf Dew Free Download Image
  Format: PNG
  Resolution: 1000x1000
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