Q.Write floral formula for a flower which, is bisexual; actinomorphic; pentamerous sepal, petal, stamens free with ovary, syncarpous, superior, trilocular with axile placentation.

Building the floral formula requires converting each stated feature into its correct symbol. A bisexual flower is shown with a combined male-and-female symbol, and an actinomorphic flower with the symbol for radial symmetry. Pentamerous sepals and petals that are free from one another are written as K5 and C5, without any bracket, since a bracket is reserved for parts that are united. A syncarpous, trilocular, superior ovary is written using G with a number showing the fused carpels, and a line placed below the G to indicate that the ovary is superior.

• Symmetry and sex: actinomorphic, bisexual …

A floral formula is simply a compact symbolic summary of a flower's structure, built up whorl by whorl from the description given.

• Symmetry and sex: since the flower can be divided into two equal radial halves, it is actinomorphic, shown with the symbol for radial symmetry; since it possesses both stamens and carpels, it is bisexual, shown with the combined symbol for a bisexual flower.
• Calyx: five sepals are present, and since nothing indicates they are fused, they are free, written as K5 with no enclosing bracket, which is reserved for union.
• Corolla: similarly, five free petals are written as C5.
• Androecium: the stamens are described as free, so they are written simply as A5. …

Method: Fill In a Five-Slot Template, One Whorl at a Time

Rather than trying to compose a floral formula from memory, use it as a fill-in-the-blank template with a fixed set of slots, and process the given description one clause at a time.

The slots, always in the same order, are symmetry, sex, calyx, corolla, androecium, gynoecium.

Go through the description clause by clause and fill each slot. "Bisexual" fills the sex slot with the combined symbol showing both androecium and gynoecium present. "Actinomorphic" fills the symmetry slot with the radial-symmetry symbol. "Pentamerous sepal, petal" fills the calyx slot with K5 and the corolla slot with C5, and since nothing says fused, default to free, so no bracket. "Stamens free" fills the androecium slot with A5, again no bracket since explicitly free. "Ovary syncarpous, superior, trilocular" fills the gynoecium slot with G, and since syncarpous means the carpels are fused, bracket it, and trilocular, three chambers from three fused carpels, gives the number 3 inside, producing G(3); superior means draw the line under the G symbol, since a line above would mean inferior instead. "Axile placentation" is a cross-check only, axile placentati …