The Christmas Flower

Reader Contribution by Lois Hoffman
Published on January 8, 2020
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Of all the symbols, sights and traditions of Christmas, perhaps the poinsettia is the one most taken for granted. It’s cheery red leaves (not petals, we’ll get to that in a minute) adds festive touches to homes, churches and businesses every holiday season, making it the most popular holiday plant.

False “Flowers”

Those bright red “flowers” on the poinsettia plant are actually leaves and not its flowers. The flowers are actually the yellow clustered buds in the center of the plant. The colored leafy parts are called bracts which are modified leaves that turn color in response to the plant’s forming flowers. Once the flowers are gone, the leaf bracts fall off. Eventually, even the green ones drop.

The poinsettia is a light sensitive plant. When you deprive the plant of light in its full leafing stage, the only chlorophyll used to turn the leaves green cannot be produced. As a result of this total darkness and lack of light, the only color that will be produced is red. This is called photoperiodism.

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