Question

Which of the following floral formula is the correct floral formula of Solanaceae family ?

• A. ⊕⊊K(5)C(5)A5G(2)
• B. ⊕⊊K5C(5)A5G(2)
• C. ⊕⊊K5C5A5G(2)
• D. ⊕⊊K(5)C5A5G(2)

Hint:

The "Potato Family" (Solanaceae) likes to "stay together"—everything (K, C, and G) is fused, represented by brackets in the formula!

Answer 1

The Correct Option is A

Step 1 : Understanding the Question
The objective is to identify the accurate floral formula for the Solanaceae family, known as the "potato family," by checking the symbols for symmetry, sex, and whorl arrangement.
Step 2 : Key Formulas and approach
A floral formula uses symbols like $\oplus$ (actinomorphic), $\text{\textdiedashed}$ (bisexual), K (Calyx), C (Corolla), A (Androecium), and G (Gynoecium). Brackets $(\,)$ indicate fusion. An underline below G indicates a superior ovary. The approach is to match these with the family's traits.
Step 3 : Detailed Explanation

Symmetry and Sex: Solanaceae flowers are actinomorphic (radially symmetrical), represented by $\oplus$, and bisexual, represented by $\text{\textdiedashed}$.

Calyx (K): There are 5 sepals which are united (gamosepalous). This is written as $K_{(5)}$.

Corolla (C): There are 5 petals which are also united (gamopetalous). This is written as $C_{(5)}$.

Androecium (A): There are 5 stamens. A key feature of this family is that the stamens are epipetalous (attached to the petals).

Gynoecium (G): The ovary is bicarpellary and syncarpous (fused), represented by $(2)$. The ovary is superior, indicated by the underline $\underline{G}$. Thus, we have $\underline{G}_{(2)}$.

Analysis: Option (B) correctly captures all these features with appropriate brackets for fusion and symmetry symbols.

Step 4 : Final Answer
The correct floral formula for Solanaceae is option (B).