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 Food. In this category "Leaf" we have 19 free PNG images with transparent background.

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  Euclidean Leaf,Vector Vector Leaf PNG Free Photo
  Format: PNG
  Resolution: 1000x1000
  Size: 18.4KB
  Downloads: 987
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  Leaf Leaves Computer Green File Border
  Format: PNG
  Resolution: 1134x1134
  Size: 946.2KB
  Downloads: 442
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  Green Mint Leaf Peppermint Free Download PNG HQ
  Format: PNG
  Resolution: 1183x1063
  Size: 210.1KB
  Downloads: 417
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  Leaf Falling Green Leaves Maple Free Photo PNG
  Format: PNG
  Resolution: 1864x1864
  Size: 485.7KB
  Downloads: 341
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  Leaf Green Cartoon Transparent Free Photo PNG
  Format: PNG
  Resolution: 8000x6540
  Size: 3.2MB
  Downloads: 339
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  Vegetable Basil Leaves Leaf Free Transparent Image HQ
  Format: PNG
  Resolution: 1181x1181
  Size: 732.4KB
  Downloads: 328
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  Fly Euclidean Material Vector Leaf HD Image Free PNG
  Format: PNG
  Resolution: 800x800
  Size: 99.2KB
  Downloads: 327
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  Leaf Silicone Tree Telephone 5S Watercolor Green
  Format: PNG
  Resolution: 3885x3861
  Size: 2.1MB
  Downloads: 318
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  Be Organics Leaf Natural Android Free Download PNG HQ
  Format: PNG
  Resolution: 346x883
  Size: 368.4KB
  Downloads: 312
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  Autumn Plant Leaf Maple Free PNG HQ
  Format: PNG
  Resolution: 3550x1799
  Size: 847.3KB
  Downloads: 281
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  Raster Twitter Of Nut Graphics Scotland Gaelic
  Format: PNG
  Resolution: 601x601
  Size: 143.7KB
  Downloads: 252
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  Beads Universe Vegetables Granger Potter Pickled Fictional
  Format: PNG
  Resolution: 620x660
  Size: 17.2KB
  Downloads: 251
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  Leaves,Apple Leaves Leaf Apple Free PNG HQ
  Format: PNG
  Resolution: 2950x2094
  Size: 3.4MB
  Downloads: 250
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  Arts Silhouette Venzel Ali Hz. Ilim Kapisi
  Format: PNG
  Resolution: 585x600
  Size: 144.1KB
  Downloads: 244
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  And Perfect Oil For Recipes Over Essential
  Format: PNG
  Resolution: 1000x750
  Size: 411.4KB
  Downloads: 229
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  Budgie Solus Mate Linux Circle Distribution
  Format: PNG
  Resolution: 1200x1200
  Size: 110.6KB
  Downloads: 227
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  Pattern Line Leaf Angle Symmetry Free HD Image
  Format: PNG
  Resolution: 1333x1600
  Size: 1.2MB
  Downloads: 227
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  Budgie Distribution Solus Mate Linux Free Download Image
  Format: PNG
  Resolution: 512x512
  Size: 31.9KB
  Downloads: 221
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  Plants Design Leaf Illustration Graphics Download HD PNG
  Format: PNG
  Resolution: 600x600
  Size: 29.9KB
  Downloads: 207

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