Ovary position depends on where the calyx, corolla and stamens sit compared to the ovary. A superior ovary sits above all other parts (hypogynous flower, e.g. mustard). An inferior ovary sits below them because the thalamus grows over and fuses with it (epigynous flower, e.g. guava, cucumber). A half-inferior ovary sits in the middle, with other parts on the thalamus rim at the same level (perigynous flower, e.g. plum, rose, peach). Memory hook: "SUPer ovary is on TOP; INferior is IN a cup; HALF is in the MIDDLE."
Ovary position rises relative to the other whorls as you move from hypogynous (superior) to perigynous (half-inferior) to epigynous (inferior). Pink = ovary, brown = thalamus, green = other floral parts.
Your doubts, answered
Is a superior ovary hypogynous or epigynous?
A superior ovary belongs to a HYPOGYNOUS flower. Here the gynoecium (ovary) sits at the highest point of the thalamus, and the sepals, petals and stamens are attached below it. NCERT examples are mustard, china rose and brinjal. Do not confuse this with epigynous, which gives an INFERIOR ovary.
Which flowers have a half-inferior ovary?
A half-inferior ovary is found in PERIGYNOUS flowers. The ovary sits in the centre and the other floral parts are on the rim of the thalamus at almost the same level as the ovary. The NCERT examples you must remember are plum, rose and peach. This is a very common NEET match-the-column item.
Are ray florets of sunflower superior or inferior?
Ray florets of sunflower have an INFERIOR ovary. Sunflower belongs to family Asteraceae, where the thalamus grows up and fuses around the ovary, making the flower epigynous. NEET 2020 asked exactly this and the answer was inferior ovary. Do not mark superior.
What is the difference between superior and inferior ovary in one line?
In a superior ovary (hypogynous flower) the ovary is on TOP and other parts are below it. In an inferior ovary (epigynous flower) the ovary is at the BOTTOM, enclosed by the thalamus, and other parts arise above it. The half-inferior (perigynous) type is in between, with parts at the same level.
Is guava a superior or inferior ovary?
Guava has an INFERIOR ovary and is an epigynous flower, just like cucumber. In these flowers the margin of the thalamus grows upward, encloses the ovary completely and fuses with it, so the ovary sits below the other floral parts.
⚠️ The NEET trap ✗ Ray florets of sunflower have a superior ovary because the petals look like they sit above the ovary. ✓ Ray florets have an INFERIOR ovary. Sunflower is epigynous: the thalamus grows over and fuses around the ovary, so the ovary lies below the other parts. NEET 2020 answer = inferior ovary. 🧠 Sunflower head = epigynous = INFERIOR. Remember guava, cucumber and sunflower ray florets travel together.
Real NEET questions
NEET 2020
The ovary is half inferior in:
A · Sunflower
B · Plum ✓
C · Brinjal
D · Mustard
Solution: A half-inferior ovary occurs in perigynous flowers, where the gynoecium is central and other parts arise on the thalamus rim at almost the same level. NCERT examples are plum, rose and peach. Sunflower is epigynous (inferior), while brinjal and mustard are hypogynous (superior). So the answer is plum.
NEET 2020
Ray florets have:
A · Hypogynous ovary
B · Half inferior ovary
C · Inferior ovary ✓
D · Superior ovary
Solution: Ray florets of sunflower (Asteraceae) are epigynous. The thalamus margin grows up and fuses around the ovary, so the ovary lies below the other floral parts and is inferior. 'Hypogynous' would mean a superior ovary, so the correct answer is inferior ovary.
NEET 2024
Identify the type of flowers based on the position of calyx, corolla and androecium with respect to the ovary from figures (a) and (b).
A · (a) Hypogynous; (b) Epigynous
B · (a) Perigynous; (b) Epigynous
C · (a) Perigynous; (b) Hypogynous ✓
D · (a) Epigynous; (b) Perigynous
Solution: In figure (a) the other parts arise on the thalamus rim at about the same level as the gynoecium, with a half-inferior ovary, so it is perigynous. In figure (b) the gynoecium is at the highest position with other parts below it (superior ovary), so it is hypogynous. Answer: (a) Perigynous; (b) Hypogynous.
Solved Morphology of Flowering Plants NEET PYQs
Try the real previous-year questions from this chapter — each with the answer and a full solution.
What decides if an ovary is superior, inferior or half-inferior?
The position of the calyx, corolla and androecium with respect to the ovary on the thalamus. If these parts are below the ovary the ovary is superior; if above it, inferior; if at the same level, half-inferior.
Superior ovary belongs to which type of flower?
A hypogynous flower. The ovary is at the highest point and all other whorls are attached below it. Examples: mustard, china rose, brinjal.
Inferior ovary belongs to which type of flower?
An epigynous flower. The thalamus grows up and fuses around the ovary, so other parts sit above it. Examples: guava, cucumber, ray florets of sunflower.
Half-inferior ovary belongs to which type of flower?
A perigynous flower. The ovary is central and other parts are on the thalamus rim at the same level. Examples: plum, rose, peach.
How is this shown in the floral formula?
A line ABOVE the G (gynoecium symbol) means an inferior ovary (epigynous). A line BELOW the G means a superior ovary (hypogynous). This exact rule was tested in NEET 2025.
