Question:
A student was given a bisexual, actinomorphic pentamerous, gamosepalous and gamopetalous with 5 stamens in epipetalous condition and bicarpellary syncarpous superior ovary and asked to state the floral formula. Which one of the following is the correct floral formula for the given flower?
A student was given a bisexual, actinomorphic pentamerous, gamosepalous and gamopetalous with 5 stamens in epipetalous condition and bicarpellary syncarpous superior ovary and asked to state the floral formula. Which one of the following is the correct floral formula for the given flower?
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Parentheses () = United/fused parts.
Arc over symbols $\overbrace{\text{C A}}$ = Adhesion between different whorls (like epipetalous).
Underline $\underline{\text{G}}$ = Superior ovary (floral parts attached below it).
Arc over symbols $\overbrace{\text{C A}}$ = Adhesion between different whorls (like epipetalous).
Underline $\underline{\text{G}}$ = Superior ovary (floral parts attached below it).
Updated On: Apr 26, 2026
- $\oplus$ $\text{Bisexual}$ $K_{(5)} C_{(5)} A_{5} \underline{G}_{(2)}$
- $\oplus$ $\text{Bisexual}$ $K_c \overbrace{C A} G...$
- $\oplus$ $\text{Bisexual}$ $K_{(5)} C_{(5)} A_{5} \overline{G}_{(2)}$
- $\oplus$ $\text{Bisexual}$ $K_{(5)} \overbrace{C_{(5)} A_{5}} \underline{G}_{(2)}$
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Verified By Collegedunia
The Correct Option is D
Solution and Explanation
Step 1: Understanding the Concept: A floral formula uses specific symbols to concisely represent the morphological features, numbers, and arrangements of floral parts in a plant.
Step 2: Key Formula or Approach: Translate each given descriptive morphological term directly into its corresponding standard botanical symbol.
Step 3: Detailed Explanation: Let's break down the given description:
- Actinomorphic: Represented by the symbol $\oplus$.
- Bisexual: Represented by the combined male/female symbol.
- Pentamerous, gamosepalous: Calyx ($K$) has 5 sepals, and they are united. Represented as $K_{(5)}$.
- Gamopetalous: Corolla ($C$) has 5 petals (due to pentamerous condition), united. Represented as $C_{(5)}$.
- 5 stamens in epipetalous condition: Androecium ($A$) has 5 free stamens ($A_{5}$). Epipetalous means stamens are attached to petals, indicated by an arc connecting $C$ and $A$. Thus, $\overbrace{C_{(5)} A_{5}}$.
- Bicarpellary syncarpous superior ovary: Gynoecium ($G$) has 2 carpels, united (syncarpous), and superior (line below G). Represented as $\underline{G}_{(2)}$.
Combining all these parts, the correct floral formula is $\oplus \text{Bisexual } K_{(5)} \overbrace{C_{(5)} A_{5}} \underline{G}_{(2)}$.
This formula is characteristic of the family Solanaceae.
Step 4: Final Answer: The correctly assembled formula is found in option (4).
Step 2: Key Formula or Approach: Translate each given descriptive morphological term directly into its corresponding standard botanical symbol.
Step 3: Detailed Explanation: Let's break down the given description:
- Actinomorphic: Represented by the symbol $\oplus$.
- Bisexual: Represented by the combined male/female symbol.
- Pentamerous, gamosepalous: Calyx ($K$) has 5 sepals, and they are united. Represented as $K_{(5)}$.
- Gamopetalous: Corolla ($C$) has 5 petals (due to pentamerous condition), united. Represented as $C_{(5)}$.
- 5 stamens in epipetalous condition: Androecium ($A$) has 5 free stamens ($A_{5}$). Epipetalous means stamens are attached to petals, indicated by an arc connecting $C$ and $A$. Thus, $\overbrace{C_{(5)} A_{5}}$.
- Bicarpellary syncarpous superior ovary: Gynoecium ($G$) has 2 carpels, united (syncarpous), and superior (line below G). Represented as $\underline{G}_{(2)}$.
Combining all these parts, the correct floral formula is $\oplus \text{Bisexual } K_{(5)} \overbrace{C_{(5)} A_{5}} \underline{G}_{(2)}$.
This formula is characteristic of the family Solanaceae.
Step 4: Final Answer: The correctly assembled formula is found in option (4).
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