English: Schema depicting the floral structure of Asteraceae using Leucanthemum vulgare agg.
a – disc floret; b – ray floret
1 – style with stigmas
2 – anthers fused to form a tube
3 – corolla (petals), in the case of the ray floret three petals are joined to form a strap (in other species, e.g. 5 petals can form a ligule)
4 – reduced calyx; 4’ – in many other species (like Carduus acanthoides shown here), it forms a pappus
5 – inferior ovary fused of two carpels containing one abaxial ovule (basal placentation)
The floral diagrams are in the style of Ronse De Craene (2010), colored.
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