Oval and eccentric starch grains are found in maize,

Explanation

**Step-by-Step Solution:**

1. **Understanding Starch:** Starch is a polysaccharide that serves as a reserve carbohydrate in plants. It is primarily stored in organelles called amyloplasts and chloroplasts.

2. **Structure of Starch Grains:** Each starch grain has a central point known as the hilum. Starch is deposited around this hilum, and the arrangement can be either concentric or eccentric.

3. **Starch Grain Arrangement in Different Plants:**
- **Concentric Arrangement:** In plants like maize and rice, starch grains are arranged in a concentric manner around the hilum.
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