Question

in family papilionaceae ,5 petal form a unique association in which 3 different elements participate these are vexillum, alae &carina , what is the number of these elements​

Answer 1

Answer:

the no. of these elements:

1. there is one long posterior petal called standard petal or vexillum
2. there are two lateral petals calked wings or alae.
3. there are two anterior fused petals called as keel or Carina.

Answer 2

In family Papilionaceae, there are flowers with a special type of aestivation. Aestivation is the arrangement of petals (corolla) and sepals (calyx).

- One of the aestivations is "vexillary". In this type of arrangement there are five elements given as follows:

1. Standard or vexillum ----which is single, posterior and the largest.

2. Wings or alae---which are two in number and partially covered by standard.

3. Keel or carina----which are again two in number and these are smaller and united to form a boat shaped structure.

- In total, there are five elements in this kind of arrangement. This also called Papillionaceous aestivation.