What is weed with square stem?

Weed with a square stem typically refers to plants in the mint family (Lamiaceae), such as catnip or mint itself. These plants are characterized by their distinctive square-shaped stems, which can be easily identified by their cross-section. The square stem is a unique trait of this family and helps differentiate them from other plants. Additionally, many of these species have aromatic leaves and are often used in culinary or medicinal applications.