The centre of a flower of Helleborus orientalis, the Lenten Rose. The picture shows four concentric tissue layers of different types and function. The

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The centre of a flower of Helleborus orientalis, the Lenten Rose. The picture shows four concentric tissue layers of different types and function. The outermost layer comprises petals, here with reddish markings. Next is a layer of nectaries (lime green tubes), with a ring of anthers (pale cream, stalked) towards the centre of the flower. At the centre are five styles (red, green tips), bearing the terminal female stigmatic surface. These structures serve to ensure seed production. Petals are a visual attractant to insects; nectaries offer insects a food reward. When the anthers mature, they produce pollen (visible here to right) which adheres to the visiting insect, and so is carried to the stigmas of the next flower encountered, resulting in fertilisation. The Lenten rose is a popular hardy perennial garden plant flowering in late winter and early spring in the UK

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Size: 3468px × 5212px
Photo credit: © DR JEREMY BURGESS/SCIENCE PHOTO LIBRARY / Alamy / Afripics
License: Licensed
Model Released: No

Keywords: anther, flower, garden, hardy, helleborus, lenten, nectary, orientalis, perennial, petal, plant, rose, stigma, structure, style