The back of a sunflower (Helianthus annuus). The stem is the long, narrow part and is referred to as a peduncle for composite flowers. The green, hairy structures that resemble leaves are called phyllaries. The yellow parts that are pictured behind the phyllaries are ray flowers.Galleries:SunflowersKeywords:asteraceae, back of sunflower, bract, helianthus annuus, peduncle, phyllaries, ray flowers, sunflowerPhoto Location: FCIT Photo Studio, Tampa, FLPhotographer: Dr. Roy WinkelmanDate of Photo: 09/12/2011Device Make: CanonDevice Model: Canon EOS 5D Mark IIOriginal Dimensions: 5211×3744Picture Orientation: LandscapeGPS Coordinates: 28°3'40.85"N 82°24'36.26"WPicture Number: 13754
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