Term

Description/Example

(A)

Valvate

(i)

Sepals or petals overlap

one another but not in any

particular direction, as in

Cassia

Sepals or petals overlap

one another but not in any

particular direction, as in

Cassia

(B)

Twisted

(ii)

The largest petal overlaps the

two lateral petals, which in

turn overlap the two smallest

anterior petals, as in pea.

The largest petal overlaps the

two lateral petals, which in

turn overlap the two smallest

anterior petals, as in pea.

(C)

Imbricate

(iii)

Sepals or petals in a whorl

just touch one another at the

margin, as in Calotropis

Sepals or petals in a whorl

just touch one another at the

margin, as in Calotropis

(D)

Vexillary

(iv)

One margin of the appendage

overlaps that of the next, as in

China rose

One margin of the appendage

overlaps that of the next, as in

China rose