plant-flower-tropical-03

plant-flower-tropical-03 - the style, which has a forked...

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Flower structure (tropical) 3 Aspelia Composite flowers (Compositae). The ‘flowers’ in plants such as daisies, marigolds and sunflowers, consist, in fact, of a dense group of many flowers called an inflorescence . What at first appears to be a petal in the ‘flower’ head is actually a tiny, but complete flower often called a floret. Aspelia latifolia* In the inner florets of the Aspelia inflorescence there are five sepals joined to form a tube. Similarly the five petals (yellow/orange) are also joined together to form a tube at the base but with free tips. Five anthers are joined together and grouped round
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Unformatted text preview: the style, which has a forked stigma. There is a single ovule in the ovary. In some compositae, including Aspelia , the outer florets with conspicuous petals have no reproductive organs and are said to be sterile florets. Only the inner florets carry the reproductive organs. Aspelia- inner floret stigma style 5 anthers fused round style petal tube joined sepals Aspelia latifolia inflorescence Sterile outer floret joined sepals 5 petals joined together D.G. Mackean inner florets petals of outer florets * Aspelia latifolia is an African plant...
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This note was uploaded on 11/29/2011 for the course BIO 218 taught by Professor Young during the Fall '11 term at BYU.

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