Question

what is the name of the stalk which holds a flower up ?​

Answer 1

Explanation:

filament is called the stock which holds of the flower

Answer 2

Answer:

peduncle: the stalk of a flower.

more information.

receptacle: the part of a flower stalk where the parts of the flower are attached.

sepal: the outer parts of the flower (often green and leaf-like) that enclose a developing bud.

petal: the parts of a flower that are often conspicuously colored.