Daisy flower, SEM

Daisy flower, SEM

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Credit: STEVE GSCHMEISSNER/SCIENCE PHOTO LIBRARY

Caption: Daisy flower. Coloured scanning electron micrograph (SEM) of a daisy flower with some florets removed. Daisy plants (family Asteraceae, formerly Compositae) have composite flowers comprising a central area of tubular disc florets (not seen) surrounded by larger ray florets (orange), which each have a single petal. During reproduction the disc florets are pollinated and form seeds known as cypselas (brown). The cypselas become detached from the daisy and are carried on the wind to new ground where they germinate. The small circular scars (right) show where each of the seeds was attached to the flower.

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Keywords: asteraceae, base, bases, botany, coloured, compositae, composite, cypsela, daisy, disc floret, florets, flower, flowering, horizontal, nature, part, parts, petal, petals, plant, plants, ray, removed, reproduction, reproductive, scanning electron micrograph, seed, seeds, sem, shed, structure, surface

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