The flower head of the flower is a structure that is formed by a mass of plant cells, which is made up of a hollow structure called a calyx. The calyx contains the sepals and petals, which are the outermost parts of the flower. The sepals and petals are joined together by a stalk called the petaloid tube. The petaloid tube connects the nyt mini crossword sepals and petals to each other, and it is where the pollen is transferred from one flower to another. The petaloid tube also contains hairs called stamens, which are responsible for fertilizing the flower.