Perianth of a flower
The perianth is the outer envelope enclosing a flower and
is made up of either:
- an outer calyx and inner corolla;
- a calyx or corolla; or
- calyx and corolla combined and undifferentiated from
The corolla of a flower is divided up into petals
whereas the calyx (which usually encloses the corolla at its base) is
made up or sepals. If the calyx and corolla are combined into one
undifferentiated unit, then the individual parts are referred to as tepals.
showing perianth made up of calyx and corolla. Petals are fused into a
flower. Calyx and corolla are undifferentiated from one another, hence
use to term tepal instead of sepal or petal.