The outermost whorl of a flower is called the calyx
The outermost whorl circle of a flower is called the calyx. By looking at the calyx, you can typically see if the flower is a male or female.
Sepals
outermost part of flower
sepal
Whorl is a short stalk where the important parts of a flower are attached. The outermost part attached on the whorl is the calyx that is made of sepals.
Modified leaf that protects a flower bud
Dermal tissue is the outer covering of a flower. The inner part of a flower is commonly called the stamen. Another part of a flower is called the petal.
the seaples protect a flower before it blooms
The sepals protect the flower when it's in bud by enclosing and shielding it. Sepals are the outermost protective structures of the flower, providing support and protection while the flower develops inside.
The Epidermis
Yes, it can as long as it is not the tangent line of the outermost circle. If it is tangent to any of the inner circles it will always cross the outer circles at two points--so it is their secant line--whereas the tangent of the outermost circle is secant to no circle because there are no more circles beyond that last one.
The sepals of a flower surround and protect the important parts such as the petals and reproductive organs. They are typically green and form the outermost layer of the flower before it blooms.