Mean Anthoceropsida

Let's solve this.

The mean in this context refers to the average. So, Mean Anthoceropsida would refer to the average characteristics or measurements of plants belonging to the class Anthoceropsida. Anthoceropsida is a small group of bryophytes, commonly known as hornworts.

To provide a specific "mean," I would need data on particular characteristics (e.g., mean height, mean number of chloroplasts per cell, mean spore size) for a representative sample of hornworts. Without specific data, it's a general concept.