In monadelphous stamens, the filaments of all stamens are united forming a single bundle but the anthers are free, e.g., cotton, lady's finger. Diadelphous stamens have filaments united forming two bundles and anthers are free eg. gram, pea, bean. Vexillary aestivation has papilionaceous corolla which has a large posterior petal is called-standard, two lateral ones are wings and two small anterior petals are termed keel. The floral formula for Liliaceae is P(3+3) or 3+3,A3+3,G(3). Solanaceae floral formula is K(5){C(5)A5}G(2)