Helianthus is a genus of plant life comprising approximately 70 species. besides for three species in south the united states, all helianthus species are local to north America and vital the us. The not unusual names "sunflower" and "common sunflower" usually confer with the popular annual species helianthus annuus, whose spherical flower heads in combination with the ligules appear like the solar. this and different species, appreciably Jerusalem artichoke (h. Tuberous), are cultivated in temperate regions and some tropical regions as food plants for people, livestock, and poultry, and as decorative vegetation. the species h. Annuus normally grows over the summer and into early fall, with the height boom season being mid-summer.
Perennial sunflower species aren't as not unusual in lawn use because of their tendency to spread hastily and become aggressive. The whorled sunflower, helianthus verticillatus, become listed as an endangered species in 2014 while the U. S. Fish, and flora and fauna provider issued a final rule protecting it beneath the endangered species act. The number one threats are industrial forestry and pine plantations in Alabama, Georgia, and Tennessee. They grow to 1. 8 m (6 ft) and are mainly observed in woodlands, adjacent to creeks and moist, prairie-like areas. sunflowers originate within the Americas. They have been first domesticated in what is now Mexico and the southern u. S. A. domestic sunflower seeds were found in Mexico, dating to 2100 BCE. Local American human beings grew sunflowers as a crop from Mexico to southern Canada. within the 16th century the primary crop breeds have been brought from the USA to Europe via explorers.

In this sub category you can download free PNG images: Sunflower Nature. In this category "Sunflower" we have 11 free PNG images with transparent background.

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  Sunflower
  Format: PNG
  Resolution: 900x824
  Size: 740.1KB
  Downloads: 440
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  Sunflower Transparent Background
  Format: PNG
  Resolution: 1241x1547
  Size: 870.1KB
  Downloads: 575
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  Sunflower Free Download
  Format: PNG
  Resolution: 902x1611
  Size: 1.0MB
  Downloads: 529
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  Sunflower Hd
  Format: PNG
  Resolution: 1096x1096
  Size: 2.0MB
  Downloads: 493
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  Sunflower File
  Format: PNG
  Resolution: 500x500
  Size: 301.8KB
  Downloads: 566
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  Sunflower Photo
  Format: PNG
  Resolution: 537x600
  Size: 246.7KB
  Downloads: 649
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  Sunflower Clipart
  Format: PNG
  Resolution: 2285x1795
  Size: 2.8MB
  Downloads: 470
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  Sunflower Transparent
  Format: PNG
  Resolution: 599x614
  Size: 363.9KB
  Downloads: 415
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  Sunflower Transparent Image
  Format: PNG
  Resolution: 1560x1561
  Size: 2.2MB
  Downloads: 601
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  Sunflower Photos
  Format: PNG
  Resolution: 400x400
  Size: 60.2KB
  Downloads: 463
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  Sunflower Image
  Format: PNG
  Resolution: 1350x1314
  Size: 2.3MB
  Downloads: 413

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