KAREN'S GALLERY (est. 2005)

keel is a flap of skin; calcar (that pale line) is a spur of cartilage that supports the interfemoral membrane

http://en.wikipedia.org/wiki/Calcar

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Photo info

  • Title: keel is a flap of skin; calcar (that pale line) is a spur of cartilage that supports the interfemoral membrane
  • Description: http://en.wikipedia.org/wiki/Calcar
  • File name: keel and calcar b.jpg

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Smooth Aster (Symphyotrichum laeve var. laeve)