In vexillary aestivation (eg, papilionaceous plants), the large posterior petal is called standard, two lateral ones are wings and two small anterior petals are termed keel. General floral formula for family-Liliaceae is Br⊕2P3+3 A3+3G(3) In pea flower, the stamens are diadelphous, ie, anthers remain free, while filaments unite to form two separate bundles. The general floral formula for family-Solanaceae is 