Glossary of plant morphology others may form a tight spiral, or whorl, around the flower stem. First, at the base, are those non-reproductive structures involved in protecting the flower when it is still a bud, the sepals, then are those parts that play a role in attracting pollinators and are typically coloured, the petals, which together with the sepals make up the perianth (perigon, perigonium). If the perianth is differentiated, the outer whorl of sepals forms the calyx, and the inner whorl of petals, the corolla. If the perianth is not differentiated into sepals and petals, they are collectively known as tepals. In some
Calyx-Krater by the artist called the Painter of the Berlin Hydria depicting an Amazonomachy sitting calmly on her horse. Beside her is a crouched Amazon who appears to be striking something behind the horse. To the right of that Amazon is another Greek soldier leaning away with an ax raised above his head. On the far right is an Amazon with an ax raised above her head apparently preparing to strike a Greek soldier around the side of the vase. Calyx-Krater by the artist called the Painter of the Berlin Hydria depicting an Amazonomachy The calyx-krater by the artist called the "Painter of the Berlin Hydria depicting an Amazonomachy" is an ancient Greek painted