Red poinsettia inflorescence closeup

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A closeup of a poinsettia flower cluster from directly above it. Many people confuse the bracts (red leaves) with the petals of flowers; they're quite different.   This macro shot shows a number of bracts (colored leaves associated with a flower) surrounding the flowers (green, red, and yellow structures) and extending out of the frame.  The flowers themselves are called cyanthia; the green tissue surrounding each flower is an involucre, a cluster of bracts (leaves) fused into a cup-shaped structure that contains multiple male flowers and one female flower within it.  Emerging from the involucre you can see red filaments supporting yellow anthers on the male flowers;  a single female flower will emerge from the center of each flower later.  The bright yellow, liquid-filled structures attached to the involucre are nectar glands filled with sweet nectar to attract pollinators; on less-developed flowers they look like little light-green lips.
A closeup of a poinsettia flower cluster from directly above it. Many people confuse the bracts (red leaves) with the petals of flowers; they're quite different. This macro shot shows a number of bracts (colored leaves associated with a flower) surrounding the flowers (green, red, and yellow structures) and extending out of the frame. The flowers themselves are called cyanthia; the green tissue surrounding each flower is an involucre, a cluster of bracts (leaves) fused into a cup-shaped...
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Poinsettias
Keywords:
  • 60mm efs
  • California
  • Euphorbia pulcherrima
  • OCC
  • Poinsettia
  • anther
  • botany
  • bract
  • closeup
  • cyanthia
  • cyanthium
  • flower
  • green
  • horticulture
  • involucre
  • involucrum
  • macro
  • nectar
  • nectar gland
  • plant
  • red
  • yellow