The standard petal of a papilionaceous corolla is also called

55 2016 Morphology of Flowering PlantsAestivation – vexillary Easy
The standard petal of a papilionaceous corolla is also called
A pappus.
B vexillum.
C corona.
D carina.

Explanation

Standard = vexillum; wings = alae; keel = carina.

Detailed Solution

Among five petals, the largest (standard) petal overlaps the two lateral wing petals, which overlap the two smallest anterior petals. This is vexillary or papilionaceous aestivation; the standard petal is the vexillum.

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