Describe two main groups of inflorescence.

Explanation

### Step-by-Step Solution

1. **Definition of Inflorescence**: Inflorescence refers to the arrangement of flowers on a floral axis. It is an important aspect of plant morphology that helps in understanding how flowers are organized in a plant.

2. **Main Groups of Inflorescence**: Inflorescence is primarily divided into two main groups:
- **Racemose Inflorescence**: In this type, the main axis continues to grow indefinitely. The flowers are arranged laterally along the axis, which allows for the development of new flowers over time. This type of inflorescence can include structures such as racemes, spikes, and panicles.
- **Cymose Inflorescence**: In contrast, the main axis in cymose inflorescence terminates in a flower. This means that the growth of the main axis stops when a flower is formed at its tip. The flowers in this arrangement are typically arranged in a way that the older flowers are at the base and the newer flowers are at the top. Examples include cymes and umbels.

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