Flowers - Research Article from Macmillan Science Library: Plant Sciences

This encyclopedia article consists of approximately 8 pages of information about Flowers.
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Definition and Flower Parts

Despite the enormous diversity in the number, size, and shape of floral organs within the angiosperms, they all are built of four basic organ types (sepals, petals, stamens, and carpels) whose relative positions are invariant. The flower is an assemblage of sterile and fertile (reproductive) parts borne on a shoot or axis called the receptacle. The sterile parts include the sepals (collectively called the calyx) and the petals (collectively called the corolla). The sepals and petals together constitute the perianth. In a typical flower the sepals are green, and they enclose and protect the young flower before it opens. The petals, whose function is to attract pollinators, exhibit an assortment of colors, shapes, and sizes. In flowers in which the sepals and petals are indistinguishable from each other, such as tulips (Liliaceae), the perianth parts are called tepals.

The reproductive parts can be divided into...

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This section contains 2,358 words
(approx. 8 pages at 300 words per page)
Buy the Flowers Encyclopedia Article
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Macmillan Science Library: Plant Sciences
Flowers from Macmillan Science Library: Plant Sciences. Copyright © 2001-2006 by Macmillan Reference USA, an imprint of the Gale Group. All rights reserved.
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