Morphology of Flowering Plants · Question 88

Consider the following four statements (i), (ii), (iii) and (iv) and select the right option for two correct statements. Statements : (i) In vexillary aestivation, the large posterior petal is called standard, two lateral ones are wings and two small anterior petals are termed keel. (ii) The floral formula for Liliaceae is [figure] (iii) In pea flower the stamens are monadelphous. (iv) The floral formula for Solanaceae is [figure] The correct statements are

1. (i) and (iii)
2. (i) and (ii)
3. (ii) and (iii)
4. (iii) and (iv)

Answer

(2) (i) and (ii)

Solution

(i) Correct: as per NCERT, in vexillary (papilionaceous) aestivation there are five petals; the largest (standard) overlaps the two lateral petals (wings), which in turn overlap the two smallest anterior petals (keel).

(ii) Correct: as per NCERT, the floral formula of Liliaceae is ⊕, bisexual, P(3+3) A3+3 G(3).

(iii) Incorrect: in pea (Fabaceae) the ten stamens are diadelphous, A(9)+1, not monadelphous.

(iv) Incorrect: as per NCERT, the floral formula of Solanaceae is ⊕, bisexual, K(5) C(5) A5 G(2) (stamens epipetalous), not K(3) C(3) A(4) G(2).

∴ The correct statements are (i) and (ii).

Answer: (2)