plant-flower-02-buttercup-stitchwort - style, each...

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Flower structure 2 - Buttercup and Stitchwort Variations In many flowers, petals or sepals are joined for part of or all of the way along their length, forming tubular structures as in the foxglove and deadnettle families. In flowers like the buttercup all the petals are the same size and are not joined. In many others, which have joined or free petals, some petals differ in size and shape from others, as in the pea family and deadnettles. The examples which follow will illustrate these variations. Buttercup ( Ranunculus bulbosus ). There are five sepals, five petals, not joined up with nectaries at their base, but curled back in the bulbous buttercup: five petals, with nectaries at their base, not joined up, about sixty stamens, thirty or forty carpels separate from each other, with a short
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Unformatted text preview: style, each containing a single ovule. petal © D.G. Mackean carpel filament nectary stamen (male part) female part Parts of the buttercup flower style and stigma honey guides anther Greater stitchwort ( Stellaria holostea ) Five sepals, not joined. Petals white with a deep cleft in each. An outer ring of five long stamens and an inner ring of five short stamens. The female part consists of three carpels joined together to make a single ovary, with many ovules, and bearing three styles. anther petal filament stamen stigma style ovary ovule receptacle Half flower of stitchwort (Stellaria holostea) sepal...
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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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