Having spikes or flowers arranged in a spike-like cluster.
The word 'spicated' is used in botany to describe the way flowers are arranged. It's a technical word used by scientists.
Examples:
The plant has spicated flowers.
The spicated flowers look very pretty.
The spicated arrangement of the flowers is unique.
I've never seen such spicated flowers before!
In the garden, there are spicated flowers of all colors.
The spicated flowers make the garden look like a rainbow.