General:
* Arrangement: This is a common term for flowers arranged for decoration.
* Display: This emphasizes the visual aspect of the flowers.
* Bouquet: This suggests a more formal arrangement of flowers.
More descriptive:
* Centerpiece: If the flowers are in the middle of the table.
* Floral centerpiece: This clarifies the type of centerpiece.
* Cluster: If the flowers are grouped together in a less formal way.
* Sprinkling: If the flowers are scattered on the table in a casual way.
You could also use a more poetic option like a bloom of flowers or a symphony of colors.
Ultimately, the best option depends on the specific situation and the desired effect.