Q.15 The important character of the family Asteraceae is
(A). Inflorescence is a racemose head or capitulum
(B). Presence of cypsela fruit
(C). Presence of gynostegium
(D). Placentation is free central
Choose the correct answer from the options given below:

1. (A) and (B) only.
2. (A), (B) and (C) only.
3. (A), (B), (C) and (D).
4. (B), (C) and (D) only.

Here’s a SEO-friendly article tailored to your request, optimized for educational searches in botany and exam prep (e.g., NEET, CSIR NET). I’ve incorporated the correct answer with a clear explanation of all options, using your preferred scientific formatting style.

---

Asteraceae Family Characteristics: Important Features and MCQ Solution

The Asteraceae family, commonly known as the sunflower or composite family, is one of the largest angiosperm families with over 20,000 species. It’s a favorite in competitive exams like NEET and CSIR NET due to its distinctive reproductive structures. This article breaks down the important character of the family Asteraceae through a solved MCQ (Question 15), explaining each option with botanical accuracy.

Correct Answer: Option 1 – (A) and (B) Only

The hallmark features of Asteraceae are its unique capitulum inflorescence and cypsela fruit. These define the family’s composite nature, where what appears as a single flower is actually a cluster of many tiny florets.

Option-by-Option Explanation

• (A) Inflorescence is a racemose head or capitulum
  Correct. Asteraceae features a capitulum (head inflorescence), a condensed raceme where sessile florets are aggregated on a fleshy receptacle. Ray florets (ligulate) and disc florets (tubular) are subtended by involucre bracts. Example: Sunflower’s head mimics one flower but contains hundreds of florets.

• (B) Presence of cypsela fruit
  Correct. The fruit is a cypsela, a one-seeded, indehiscent achene with a persistent calyx (pappus) for wind dispersal. It’s superior-ovaried and lacks endosperm. Examples: Dandelion seeds (technically cypselas) with pappus “parachutes.”

• (C) Presence of gynostegium
  Incorrect. Gynostegium is a fusion of stamens and stigma forming a pollinial structure, unique to Asclepiadaceae (milkweed family, e.g., Calotropis). Absent in Asteraceae.

• (D) Placentation is free central
  Incorrect. Asteraceae shows basal placentation in a unilocular ovary with one pendulous ovule. Free central placentation (ovules on central axis) occurs in Caryophyllaceae or Primulaceae, not here.

Why Option 1 is the Best Choice

Options 2–4 include incorrect features (C and D), making them wrong. Standard botany texts like <i>Classification of Flowering Plants</i> by A. Cronquist confirm capitulum and cypsela as defining traits. This MCQ tests family-specific diagnostics.

Exam Tips for Asteraceae Questions

• Memorize: Capitulum + cypsela = Asteraceae signature.

• Differentiate: Gynostegium → Asclepiadaceae; free central → Solanaceae/Caryophyllaceae.

• Visual aid: Study sunflower (<i>Helianthus annuus</i>) diagrams for floret types.