Which is not true about the series Heteromerae in Bentham and Hooker's system?

Options

A. Always bicarpellary condition
B. Ovary usually superior
C. Stamens are as many as corolla lobe
D. It includes three cohorts

Answer

To determine which statement is not true about the series Heteromerae in Bentham and Hooker's system, we can follow these steps:

### Step 1: Understand the Bentham and Hooker's System
Bentham and Hooker's system of classification is a taxonomic framework used to categorize plants based on their characteristics. It is important to know that the series Heteromerae is a part of this system.

**Hint:** Research the Bentham and Hooker classification system to understand its significance in plant taxonomy.

### Step 2: Define the Series Heteromerae
The series Heteromerae consists of plants that have superior ovaries and are characterized by having more than two corollas. This series is considered an artificial group, meaning it is based on certain similarities rather than natural relationships.

**Hint:** Look into the characteristics of the Heteromerae series to identify key features.

### Step 3: Analyze the Characteristics of Heteromerae
Key characteristics of the Heteromerae series include:
- Presence of superior ovaries.
- More than two corollas.
- Specific arrangements of stamens.

**Hint:** Make a list of characteristics that define the Heteromerae series to compare with the options given in the question.

### Step 4: Evaluate the Options
The question asks which statement is not true. One of the options states that there is always a bicarpillary condition, which implies that there are always two carpels. However, the Heteromerae series is defined by having more than two corollas, which suggests that the bicarpillary condition is not a characteristic of this series.

**Hint:** Compare each option against the established characteristics of the Heteromerae series to find the incorrect statement.

### Step 5: Conclude the Answer
Based on the analysis, the statement "always bicarpillary condition" is not true for the series Heteromerae, as this series allows for more than two corollas and does not restrict to a bicarpillary condition.

**Final Answer:** The statement that is not true about the series Heteromerae in Bentham and Hooker's system is "always bicarpillary condition."

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