The family containing mustard and its main characters are
Brassicaceae - Tetramerous flowers, six stamens, bicarpellary gynoecium, siliqua type fruit
Brassicaceae - Pentamerous flowers, many stamens, pentacarpellary gynoecium, capsule type fruit
Solanaceae - Pentamerous flowers, five stamens, bicarpellary gynoecium, berry type fruit
Poaceae - Trimerous flowers, three stamens, monocarpellary gynoecium, caryopsis type of fruit.
A.
Brassicaceae - Tetramerous flowers, six stamens, bicarpellary gynoecium, siliqua type fruit
Brassica or mustard belongs to family Brassicaceae. It is characterised by polypetalous 4 petals, polysepalous 4 sepals, six stamens (which are in tetradynamous condition i.e. 4 + 2. Gynoecium is bicarpellary, syncarpous unilocular with parietal placentation. Fruit is usually siliqua (dry dehiscent fruit formed by bicarpellary syncarpous gynoecium with replum) and rarely lomentum.
Solanaceae is commonly called potato family. It is characterised by bisexual flower, 5 sepals, 5 petals. Androceium is epipetalous and Gynoecium is bicarpellary obligately placed. Fruit is berry or capsule.
Poaceae or Gramineae is a large and nearly ubiquitous family of monocotyledonous flowering plants known as grasses. It is characterised by bracteate flower. It has usually 3 stamens, 3 carpels. Fruit is caryopsis or nut or berry.
